Easyflex VectorFlex CSST User manual

CSST GAS LINE SYSTEM
BY EASYFLEX®
DESIGN & INSTALLATION GUIDE
JANUARY 2020
888 577 8999 | vectorex.com

TABLE OF CONTENTS
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1. Introduction
1.1 General User Warnings
1.2 Limitations of the Guidelines
1.3 Standards, Listings, and Codes
2. System Description & Components
2.1 System Description
2.2 System Components
VectorFlex™ Worksheet
3. System Configuration
3.1 Introduction
3.2 Determining System Layout
3.3 Sizing Procedures and Examples
3.3.1 Low Pressure Systems
3.3.2 Hybrid Systems
3.3.3 Elevated Pressure System
3.3.4 Summation Method
4. Installation
4.1 General Installation Practices
4.2 Fitting Assembly
4.3 Routing
4.3.1 Vertical Runs
4.3.2 Horizontal Runs
4.3.3 Installation Clearance Holes
4.3.4 Concealed Fittings
4.3.5 Modifications to Existing Systems
4.3.6 Outdoor
4.3.7 Fire Rated Construction
4.3.8 Routing Through Masonry Material
4.3.9 Installation Within a Chase
4.4 Protection
4.4.1 Strike Plates
4.4.2 Steel Conduit
4.5 Meter
4.6 Appliance Connection
4.6.1 Movable Appliance
4.6.2 Direct Connection
4.6.3 Gas Convenience Outlet
4.6.4 Special Applications
4.7 Manifolds
4.8 Pressure Regulator
4.8.1 Installation Requirements
4.8.2 Regulator Capacity Tables
4.8.3 Outdoor Mounting Options
4.8.4 Performance
4.8.5 Regulator Outlet Pressure Adjustment
4.8.6 Over-Pressurization Protection
4.9 Underground Installations
4.10 Electrical Bonding of VectorFlex™ CSST
5. Inspection, Repair, and Replacement
5.1 VectorFlex™ CSST Installation Checklist
5.2 Installation Checklist Description
5.3 Repair of Damaged VectorFlex™ CSST
5.3.1 Determine Damage
5.3.2 Method of Repair
6. Pressure/Leakage Testing
7. Sizing Tables and Pressure Drop Charts
8. Definitions
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GENERAL USER WARNINGS
1. INTRODUCTION
1.1 GENERAL USER WARNINGS
An Easyflex® VectorFlex™ CSST (Corrugated Stainless Steel Tubing) Gas Line System must be installed by a
qualified installer who has successfully completed the required VectorFlex™ training program. The installer must comply
with all qualifications and requirements to install gas-piping as required by the local authority having jurisdiction. Improper
installation or operation of a VectorFlex™ Gas Line System may result in fire, explosion or asphyxiation.
This guide provides the installer with general guidance when designing and installing a VectorFlex™ Gas Line System.
This guideline and the instructions contained within must be used in conjunction with all applicable building standards
and codes. Where the local code and the instructions in this guide differ, follow the standards and guidelines approved by
the local authority having jurisdiction. Special attention must be given to the correct design, installation, and testing and
application of the gas line system. All installed systems must pass installation inspections by the local building official or
inspector prior to being put into service. Only tubing and fitting components manufactured by Easyflex® or its related and
authorized subsidiaries are to be used in the installation. Use of other manufacturers tubing and or fitting components in
the system are prohibited and may result in poor system performance and serious bodily injury or property damage. Where
repairs, retrofits or additions to existing systems are needed, system components should be joined using standard pipe
nipples and fittings at the interface.
This guide and Easyflex® cannot take into account all situations, applications or locations in which VectorFlex™ CSST will
be installed. Installers should also use guidance provided by the National Fuel Gas Code, ANSI Z223.1/NFPA-54, National
Standard of Canada, Natural Gas and Propane Installation Code, CSA-B149.1, the Uniform Plumbing Code, the International
Code Series, the Federal Manufactured Home Construction and Safety Standards, 24 CFR Part 3280, the Manufactured
Housing Construction and Safety Standards, ICC/ANSI 2.0 or the Standard on Manufactured Housing, NFPA 501.
Easyflex® and its related manufacturers and subsidiaries shall have no responsibility for any misinterpretation of the
information contained in this guide. Nor shall Easyflex® and its related manufacturers and subsidiaries be held liable for
any improper installation or repair work that deviated from procedures recommended in this guide. Any Warranties or
assurances are voided in the case of failure to comply with the instructions contained within this guide.
All accessory components, such as valves and regulators, are to be installed per the instructions provided by that
component’s manufacturer and consistent with the operational parameters and design restrictions of a VectorFlex™ Gas
Line System and its related manufacturers and subsidiaries are not to be held liable nor are warranty claims valid if the use of
accessories in the system diminishes performance or causes personal harm, injury, or damage to property.
A VectorFlex™ Gas Line System has advantages over rigid steel or copper pipe gas line systems due to its flexibility. In
contrast to rigid steel or copper pipe, VectorFlex™ CSST does not require joints between pipe sections or elbows. In most
installations, the tubing can be run as a continuous length and bent around obstacles and framing. Without these joints and
angles, you can save considerable labor effort and time. This design also reduces the occurrences of leaks because of the
few fittings and joints needed. The flexibility of VectorFlex™ CSST enables more installation options because an installer can
avoid existing obstacles and run the tubing in locations inaccessible to rigid pipe. It eliminates the labor intensive measuring,
cutting, threading and soldering of joint assemblies and lengths of pipe. The tubing and fitting assemblies are designed
with the ability to flex and move with ground vibrations transferred through the framing and walls they are attached to.
VectorFlex™ CSST’s flexibility is caused by its unique corrugated design and thin wall thickness. Corrugated stainless steel
combines the strength and corrosion resistance of stainless steel with the flexibility of rubber or plastic pipe by virtue of the
corrugations or ribs in the tubing. The thin wall also reduces weight without giving up the strength to contain pressurized
and fast flowing gas. CSST has been in use for delivering gas for more than 40 years in many countries around the world.

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GENERAL USER WARNINGS
The thin wall of a VectorFlex™ CSST leaves it at risk for punctures from nails, screws, staples or tacks. Precautions must be
taken on the job site to prevent the tubing from being abused during construction and installation.
• Do not dent, puncture or strike the tubing.
• Do not excessively bend, twist or stretch the tubing.
• Avoid sharp bends whenever possible.
• Gradual, rounded bends can improve flow characteristics.
• If the uncoated tubing comes in contact with chlorides (bleach) or acids (mortar and brick cleaners), rinse with water
and dry the section of tubing. Proper care must be taken to protect the tubing using strike protection and protective
placement as described in this guide during installation.
Properly bonding and grounding the VectorFlex™ Gas Line System may reduce the risk of damage and fire from a lightning
strike. Lightning is a highly destructive force. Even a nearby lightning strike that does not directly strike a structure can
cause systems in the structure to become electrically energized. Differences in potential between systems may cause the
charge to arc between systems. Such arcing can cause damage to the CSST. Bonding and grounding should reduce the
risk of arcing and related damage. Any area with a history of thunderstorms producing lighting is at risk for damage to CSST
systems. The installer should confirm that the tubing is grounded or bonded before putting the system in service.
All builders, property managers or home owners should consult a lightning safety consultant to determine whether
installation of a lightning protection system would be required to achieve sufficient protection for all building components
from lightning. Lightning protection systems are beyond the scope of this manual and installation guidelines, but are
covered by National Fire Protection Association, NFPA 780, the Standard for the Installation of Lightning Protection Systems,
and other standards. The installer should confirm with the local gas supply utility company that a suitable dielectric union
is installed at the service entry of the structure between underground metallic piping and the gas pipes going into the
building as required by code. Section 250.104b of the National Electric Code (NEC) states that “bonding all piping and
metal air ducts within the premises will provide additional safety.”
Easyflex® recommends that all continuous metallic systems be bonded and grounded. Other metallic systems may also
cause arcing and damage the CSST. Other metallic systems include, but are not limited to metallic chimney liners, metallic
appliance vents, metallic ducting and piping, electrical cables, and structural steel. The builder, property manager or home
owner should confirm that each continuous metallic system in a structure has been bonded and grounded by an electrical
professional in accordance with local building codes.
The yellow-coated jacket of the VectorFlex™ CSST protects it from damage and wear due to environment, weather, contact
with chemicals and general abrasive contact. The jacket’s flame and smoke rating is determined by testing and compliance
with ASTM E84, Surface Burning Characteristics of Building Materials. The ratings do not exceed 25 for flame spread
and are not greater than 50 for smoke density. Please confirm the local codes allowance for flame and smoke ratings of
nonmetallic materials and in the case of an installation that requires higher ratings or additional protection, please consult
the local building code and or officials.
Care should be taken when installing any type of fuel gas piping (including CSST, iron, or copper) to maintain as much
separation as reasonably possible from other electrically conductive systems in the building. Fuel gas piping, including
CSST, should not be installed within a chase or enclosure that houses a metallic chimney liner or appliance vent that
protrudes through the roof. In the event such an installation is necessary and conforms to local building codes, the metallic
chimney liner or vent must be bonded and grounded by a qualified electrical professional, and a separation distance, as
specifically permitted by the applicable local building code between the CSST and the metallic chimney liner or vent, is
required. Physical contact between CSST and the metallic chimney liner and/or vent is prohibited. If this physical separation
cannot be specifically identified in the local building code and achieved or any local building code requirements cannot be
met along the entire length, then rerouting of the CSST is required unless such installation is specifically permitted by the
local building inspector.

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LIMITATIONS OF THE GUIDELINES | STANDARDS, LISTINGS, & CODES
1.2 LIMITATIONS OF THE GUIDELINES
This guide is intended to aid the installer in the design, installation and testing of fuel gas piping systems using Corrugated
Stainless Steel Tubing (CSST) for residential, commercial and industrial buildings. It would be impossible for this guideline
to anticipate and cover every possible variation in building configurations, construction styles, appliance loads and code
restrictions. For applications that go beyond the scope of this guideline, the installer should exercise sound engineering
principles and practices and contact Easyflex® for engineering assistance.
The instructions within this guide are recommended practice for general applications. These practices must be reviewed
for compliance with all applicable local fuel gas and building codes. In the event that there is a conflict between this Guide
and local code, the local code will take precedence. Using components from other flexible gas piping systems other than
those specified as part of the VectorFlex™ system is prohibited and may result in poor system performance and serious
bodily injury or property damage.
1.3 STANDARDS, LISTINGS, & CODES
A VectorFlex™ Gas Line System complies with the following standards, listings and model codes.
Standards
• ANSI LC1/CSA 6.26 - Fuel Gas Piping Systems Using Corrugated Stainless Steel Tubing (CSST)
• ANSI LC1/CSA 6.26 - 25 PSI Operating Pressure Rating
Listings
• CSA – CSA International - Certificate No. 238420
Code Compliance
• BOCA – National Mechanical Code
• ICC – International Mechanical Code
• National Standard of Canada – National Gas & Propane Installation Code, CAN/CSA-B149.1
• NFPA 54 – National Fuel Gas Code
• NFPA 58 – Standard for the Storage and Handling of Liquified Petroleum Gases
• SBCCI – Standard Gas Code
• UMC – Uniform Mechanical Code
• UPC – Uniform Plumbing Code
• UMC – Uniform Mechanical Code
This guide was created with the best efforts to be in accordance with all regional model codes in effect at its printing.
However Easyflex® cannot guarantee that the local administrative authority will accept the most recent version of these
codes, or that they will not use the right to deny acceptance of the product. It is the ultimate responsibility of the installer
to determine acceptance of any building component including gas piping before it is installed. Easyflex® assumes
no responsibility for labor or material costs for installations made without prior determination of local code authority
acceptance.

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2. SYSTEM DESCRIPTION & COMPONENTS
2.1 SYSTEM DESCRIPTION
VectorFlex™ CSST has been tested in accordance with the American National Standard for Fuel Gas Systems Using
Corrugated Stainless Steel Tubing, ANSI LC1-2005 and CSA 6.26-2006, “Fuel Gas Piping Systems Using Corrugated Stainless
Steel Tubing (CSST).” These standards list performance requirements for certification of CSST systems for use with all
recognized fuel gases, including Natural Gas and Propane.
• System uses corrugated stainless steel tubing (CSST) made of type 304 TIG welded stainless steel.
• The tubing is annealed to increase flexibility and remove any impurities in the steel.
• A polyethylene coating prevents damage from chemicals and solvents and ads protection for the product for
underground and outdoor use.
• The polyethylene coating is fused with flame retardant material making it ASTM E84 Compliant. As a fire rated material, it
meets the requirements for flame spread and smoke density. This allows the jacket to remain intact throughout a building,
thus maximizing the protection provided by the jacket.
• VectorFlex™ CSST is connected using U.S. Patented, Easyflex® QuickFlare™ mechanical brass fittings designed
specifically for a VectorFlex™ Gas Line System. QuickFlare™ fittings are pre-calibrated from the factory and are ready to
use without the need for special tools or equipment. Its simple 3-step installation process of CUT, PUSH, TIGHTEN makes
it easy to use within a VectorFlex™ Gas Line System.
• Easyflex® QuickFlare™ fittings have standard NPT threads and may be used in combination with all approved fuel gas
pipe nipples, valves, regulators, manifolds and accessory fittings.
• System components such as manifolds, tees and stub-outs assembled to fit with threaded ends of Easyflex® QuickFlare™
fittings, and approved by national and or local authorities for use in gas distribution systems are allowed.
• The self-flaring fitting creates a one step, reusable, metal on metal seal.
• Fittings can be removed, inspected and re-used on other sections of pipe.
• Strike protection is available as steel plates and flexible sleeves, approved for use in gas line installation.
• The system can be used with different variations on code accepted manifold or parallel installations.
• Manual ball valves can be directly connected to system fittings for acceptable shut-off valve installations.
• Regulators which supplied by Easyflex®can be used with the system.
Installation Benefits
The flexible nature of the VectorFlex™ CSST allows it to be run in locations and using methods, rigid pipe cannot. It may
be run to take advantage of its flexibility and bend around obstacles without the need for joints and fittings. Long runs can
be installed as a continuous length of pipe with no need for unions or couplings. The tubing can be inserted and “snaked”
through walls, crawl spaces, above ceilings and below floors, as one continuous run of tubing. Corrugated Stainless Steel
Tubing is pulled through the structure similar in fashion to electrical wiring. The tubing may be installed in a parallel fashion
from a central distribution manifold rather than a series layout commonly used for rigid pipe systems.
SYSTEM DESCRIPTION

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2.2 SYSTEM COMPONENTS
2.2.1 CORRUGATED STAINLESS STEEL TUBING
Material Stainless Steel 304, Polyethylene Jacket
Tubing 3/8” 1/2” 3/4” 1” 1¼” 1½” 2”
Model Number* NGL-038-
YW-050
NGL-012-
YW-050
NGL-034-
YW-050
NGL-100-
YW-050
N GL-114 -
YW-050
NG L-112-
YW-050
NGL-200-
YW-050
EHD 13 18 23 31 37 47 62
Inside Diameter (ID),
Inches
0.508 0.563 0.862 1.059 1.280 1.642 2.146
(12.9 mm) (14.3 mm) (21.9 mm) (26.9 mm) (35.5 mm) (41.7 mm) (54.5 mm)
Outside Diameter (OD),
Inches
0.638 0.720 1.024 1.276 1.496 1.906 2.409
(16.2mm) (18.3mm) (26.0mm) (32.4mm) (38.0mm) (48.4mm) (61.2mm)
OD with Coating,
Inches
0.685 0.768 1.071 1.331 1.551 1.969 2.472
(17.4 mm) (19.5 mm) (27. 2 m m) (33.8 mm) (39.4 mm) (50.0 mm) (62.8 mm)
# of Corrugations/100” 61 64 58 51 49 41 39
Tube Thickness 0.0095
(0.24 mm)
0.0095
(0.24 mm)
0.0095
(0.24 mm)
0.0095
(0.24 mm)
0.0095
(0.24 mm)
0.011
(0.28mm)
0.011
(0.28mm
LDPE Thickness 0.024
(0.61 mm)
0.024
(0.61 mm)
0.024
(0.61 mm)
0.028
(0.71 mm)
0.028
(0.71 mm)
0.032
(0.81 mm)
0.032
(0.81 mm)
SYSTEM COMPONENTS
* 50 ft roll listed. 100 and 250 ft rolls also available.

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Table 2: Bending Radius
Part #
Nominal
Internal
Diameter
Minimum
Bending
Radius
Minimum
Tightening
Torque
Maximum # of
Re-assemblies per
Fitting
NGL-038-YW-XXX/NGL-038-BK-XXX 3/8” 3” 40 lbs-ft 3
NGL-012-YW-XXX/NGL-012-BK-XXX 1/2” 3” 60 lbs-ft 3
NGL-034-YW-XXX/NGL-034-BK-XXX 3/4” 3” 80 lbs-ft 3
NGL-100-YW-XXX/NGL-100-BK-XXX 1” 5” 100 lbs-ft 3
NGL-114-YW-XXX/NGL-114-BK-XXX 1¼” 5” 140 lbs-f t 3
NGL-112-YW-XXX/NGL-112-BK-XXX 1½” 5” 180 lbs-ft 3
NGL-200-YW-XXX/NGL-200-BK-XXX 2” 6” 320 lbs-ft 3
Part # Description
NGLF-038-ST 3/8” CSST x 3/8” Straight Male, NPT
NGLF-038-ST-012 3/8” CSST x 1/2” Straight Male, NPT
NGLF-012-ST 1/2” CSST x 1/2” Straight Male, NPT
NGLF-012-ST-038 1/2” CSST x 3/8” Straight Male, NPT
NGLF-034-ST 3/4” CSST x 3/4” Straight Male, NPT
NGLF-034-ST-012 3/4” CSST x 1/2” Straight Male, NPT
NGLF-100-ST 1” CSST x 1” Straight Male, NPT
NGLF-100-ST-034 1” CSST x 3/4” Straight Male, NPT
N GL F-114 - S T 1¼” CSST x 1¼” Straight Male, NPT
NG L F-112-ST 1½” CSST x 1½” Straight Male, NPT
NGLF-200-ST 2” CSST x 2” Straight Male, NPT
SYSTEM COMPONENTS
Straight Male Fitting
2.2.2 FITTINGS

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SYSTEM COMPONENTS
Part # Description
NGLF-038-SF 3/8” CSST x 3/8” Straight Female, NPT
NGLF-038-SF-012 3/8” CSST x 1/2” Straight Female, NPT
NGLF-012-SF 1/2” CSST x 1/2” Straight Female, NPT
NGLF-012-SF-038 1/2” CSST x 3/8” Straight Female, NPT
NGLF-034-SF 3/4” CSST x 3/4” Straight Female, NPT
NGLF-034-SF-012 3/4” CSST x 1/2” Straight Female, NPT
NGLF-100-SF 1” CSST x 1” Straight Female, NPT
NGLF-100-SF-034 1” CSST x 3/4” Straight Female, NPT
NGLF-114-SF 1½” CSST x 1½” Straight Female, NPT
NGLF-112-SF 3/4” (CSST) x 1/2” FIP, Straight Fitting
NGLF-200-SF 2” CSST x 2” Straight Female, NPT
Part # Description
NGLF-038-CP 3/8” Coupling
NGLF-012-CP 1/2” Coupling
NGLF-034-CP 3/4" Coupling
NGLF-100-CP 1” Coupling
NGLF-114-CP 1-1/4” Coupling
NGLF-112-CP 1-1/2” Coupling
NGLF-200-CP 2” Coupling
Part # Description
NGLF-038-T 3/8” Tee
NGLF-012-T 1/2” Tee
NGLF-034-T 3/4” Tee
NGLF-100-T 1” Tee
N GL F-114 -T 1-1/4” Tee
NG L F-112-T 1-1/2” Tee
NGLF-200-T 2” Tee
Straight Female Fitting
Coupling
Tee

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SYSTEM COMPONENTS
Part # Description
NGLF-012-RT-038 1/2” R x 1/2” R x 3/8” T, Reducing Tee
NGLF-034-RT-012038 3/4” R x 1/2” R x 3/8” T, Reducing Run & Tee
NGLF-034-RT-012 3/4” R x 3/4” R x 1/2” T, Reducing Tee
NGLF-100-RT-034012 1” R x 3/4” R x 1/2” T, Reducing Run & Tee
NGLF-100-RT-034 1” R x 1” R x 3/4” T, Reducing Tee
NGLF-114-RT-100012 1¼” R x 1” R x 1/2” T, Reducing Run and Tee
NGLF-114-RT-100034 1¼” R x 1” R x 3/4” T, Reducing Run and Tee
NGLF-114-RT-100 1¼” R x 1¼” R x 1” T, Reducing Tee
NGLF-112-RT-114012 1½” R x 1¼” R x 1/2” T, Reducing Run and Tee
NG L F-112- R T-114 034 1½” R x 1¼” R x 3/4” T, Reducing Run and Tee
NG L F-112- R T-114100 1½” R x 1¼” R x 1” T, Reducing Run and Tee
NG L F-112- R T-114 1½” R x 1½” R x 1¼” T, Reducing Tee
NGLF-200-RT-112012 2” R x 1½” R x 1/2” T, Reducing Run and Tee
NGLF-200-RT-112034 2” R x 1½” R x 3/4” T, Reducing Run and Tee
NGLF-200-RT-112100 2” R x 1½” R x 1” T, Reducing Run and Tee
NG LF -20 0 - RT-112114 2” R x 1½” R x 1¼” T, Reducing Run and Tee
NG LF -20 0 - RT-112 2” R x 2” R x 1½” T, Reducing Tee
Reducing Tee
Part # Description
NGLF-012-FT 1/2" Female Tee
NGLF-034-FT 3/4" Female Tee
NGLF-100-FT 1" Female Tee
N GL F-114 - F T 1 1/2" Female Tee
N GLF -112- F T 1 1/2" Female Tee
NGLF-200-FT 2" Female Tee
Female Tee
Part # Description
NGLF-012-RFT-038 1/2” CSST x 3/8” NPT Female Tee
NGLF-034-RFT-012 3/4” CSST x 1/2” NPT Female Tee
NGLF-100-RFT-034 1” CSST x 3/4” NPT Female Tee
Reducing Female Tee

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SYSTEM COMPONENTS
Part # Description
NGLF-038-FG 3/8” Flange Fitting, 3/8” Nut
NGLF-012-FG 1/2” Flange Fitting, 1/2” Nut
NGLF-034-FG 3/4” Flange Fitting, 3/4” Nut
NGLF-100-FG 1” Flange Fitting, 1” Nut
NGLF-114-FG 1¼” Flange Fitting, 1¼” Nut
NGLF-FG-112 1½” Flange Fitting, 1½” Nut
NGLF-FG-200 2” Flange Fitting, 2” Nut
Flange Fitting
Part # Description
NGLF -038-TM 3/8” Termination Fitting
NGLF--012-TM 1/2” Termination Fitting
NGLF--034-TM 3/4” Termination Fitting
NGLF--100-TM 1” Termination Fitting
N GL F- -114 -T M 1¼” Termination Fitting
N GL F- -112-T M 1½” Termination Fitting
NGLF -200-TM 2” Termination Fitting
Termination Fitting

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SYSTEM COMPONENTS
Part # Description
NGLF-012-APSO-012S 1/2” x 1/2” Appliance Stub Out-Short
NGLF-012-APSO-012L 1/2” x 1/2” Appliance Stub Out-Long
NGLF-012-APSO-034S 1/2” x 3/4” Appliance Stub Out Short
NGLF-012-APSO-034L 1/2” x 3/4” Appliance Stub Out Long
NGLF-034-APSO-034S 3/4” x 3/4” Appliance Stub Out Short
NGLF-034-APSO-034L 3/4” x 3/4” Appliance Stub Out Long
Appliance Stub Out
Part # Description
NGLF-012-SOO-06 1/2” x 6”, Straight Stub Out
NGLF-012-SOO-12 1/2” x 12”, Straight Stub Out
NGLF-034-SOO-06 3/4” x 6”, Straight Stub Out
NGLF-034-SOO-12 3/4” x 12”, Straight Stub Out
NGLF-100-SOO-06 1” x 6”, Straight Stub Out
NGLF-100-SOO-12 1” x 12”, Straight Stub Out
NGLF-114-SOO-06 1 1/4” x 6”, Straight Stub Out
NGLF-114-SOO-12 1 1/4” x 12”, Straight Stub Out
NGLF-112-SOO-06 1 1/2” x 6”, Straight Stub Out
NGLF-112-SOO-12 1 1/2” x 12”, Straight Stub Out
NGLF-200-SOO-06 2” x 6”, Straight Stub Out
NGLF-200-SOO-12 1/2” x 12”, Straight Stub Out
Straight Stub Out
Part # Description
NGLF-MULSOO 1/2” & 3/4” x 3/4”, Multi Outlet Stub Out
NGLF- ANGSO 1/2” x 4.5” L x 72.5°, Angle Stub Out
NGLF-DSO-12 1/2” x 3” L, Deck Stub Out
Multi Outlet/Angle/Deck Stub Out

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SYSTEM COMPONENTS
Part # Description
NGLF-MFD-01 1/2”F In, 1/2”F Out, Port 1/2”F - 3 Ports
NGLF-MFD-02 1/2”F In, 1/2”F Out, Port 1/2”F - 4 Ports
NGLF-MFD-03 3/4”F In, 1/2”F Out, Port 1/2”F - 4 Ports
NGLF-MFD-04 3/4”F In, 1/2”F Out, Port 1/2”-3/4”F - 5 Ports
NGLF-MFD-05 3/4”F In, 3/4”F Out, Port 1/2”F - 4 Ports
NGLF-MFD-06 3/4”F In, 3/4”F Out, Port 1/2”F - 5 Ports
NGLF-MFD-07 1”F In, 3/4”F Out, Port 1/2”-3/4”F - 5 Ports
NGLF-MFD-08 1”F In, 1”F Out, Port 1/2”F - 4 Ports
NGLF-MFD-09 1¼”F In, 1”F Out, Port 1/2”F - 5 Ports
NGLF-MFD-10 1¼”F In, 1¼”F Out, Port 1/2”F - 4 Ports
NGLF-MFD-11 1”F In, 1¼”F Out, Port 3/4”F - 4 Ports
NGLF-MFD-12 1”F In, 1”F Out, Port 3/4”F - 4 Ports
NGLF-MFD-13 1¼”F In, 1”F Out, Port 3/4”F - 4 Ports
NGLF-MFD-14 1½”F In, 1½”F Out, Port 3/4”F - 5 Ports
NGLF-MFD-15 2”F In, 1½”F Out, Port 1”F - 4 Ports
NGLF-MFD-16 2”F In, 1½”F Out, Port 1”F - 6 Ports
NGLF-MFD-17 2”F In, 1½”F Out, Port 1”F - 4 Ports
NGLF-MFD-18 2”F In, 2”F Out, Port 1”F - 6 Ports
Manifold
Part # Description
GLP-038-SC-050 3/4” Steel Conduit for 3/8” CSST, 50 ft
GLP-012-SC-050 1” Steel Conduit for 1/2” CSST, 50 ft
GLP-034-SC-025 1 1/4” Steel Conduit for 3/4” CSST, 25 ft
GLP-100-SC- 025 1 1/2” Steel Conduit for 1” CSST, 25 ft
G LP-114 - SC - 025 1 3/4” Steel Conduit for 1 1/4” CSST, 25 ft
GL P-112-S C- 02 5 2 1/4” Steel Conduit for 1 1/2” CSST, 25 ft
GLP-200-SC-025 3” Steel Conduit for 2” CSST, 25 ft
Steel Conduit
Part # Description
GLP-038-SC 3/4” x 1ft, Steel Conduit for 3/8” CSST
GLP-012-SC 1” x 1ft, Steel Conduit for 1/2” CSST
GLP-034-SC 1 1/4” x 1ft, Steel Conduit for 3/4” CSST
GLP-100-SC 1 1/2” x 1ft, Steel Conduit for 1” CSST
G LP-114 - SC 1 3/4” x 1ft, Steel Conduit for 1 1/4” CSST
GL P-112-SC 2 1/4” x 1ft, Steel Conduit for 1 1/2” CSST
GLP-200-SC 3” x 1 ft, Steel conduit for 2” CSST

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SYSTEM COMPONENTS
Part # Description
NGLF-STKP-32 Quarter Striker Plate, 3” x 2”
NGLF -STKP-37 Half Striker Plate, 3” x 7”
NGLF -STKP-384 Half Striker Plate, 8.4” Double
NGLF -STKP-38 Three Quarter Striker Plate, 3” x 8”
NGLF -STKP-312 Full Striker Plate, 3” x 12”
NGLF -STKP-BC Full Drop Striker Plate, (1/2”, 3/4” CSST)
NGLF -STKP-DE Full Drop Striker Plate Lg. (1”, 1 ¼” CSST)
NGLF -STKP-EX Extra Large Striker Plate 6” x17”
Striker Plate
Part # Description
GLV-012 1/2” Ball Valve
GLV-034 3/4” Ball Valve
GLV-100 1” Ball Valve
GLV-114 1 1/4” Ball Valve
GLV-012A 1/2” Angle Valve
GLV-034A 3/4” Angle Valve
Ball Valve
Part # Description
GLR-325-3L 8” w.c. NG, Regulator, 1/2” NPT
GLR-325-5AL 8” w.c. NG, Regulator, 1/2” NPT
GLR-325-5AL3 8” w.c. NG, Regulator, 3/4” NPT
GLR-3257L 8” w.c. NG, Regulator, 1-1/4” NPT
GLR-325-3L48D 8” w.c. NG, Regulator, 1-1/4” NPT with OPD
GLR-325-5AL600D 8” w.c. NG, Regulator, 1/2” NPT with OPD
GLR-325-3LP 11” w.c. LP, Regulator, 1/2” NPT
GLR-325-5ALP 11” w.c. LP, Regulator, 3/4” NPT
NG Regulator
Part # Description
NGLF-BC-S Fits 3/8”, 1/2”, and 3/4” (Small)
NGLF-BC-L Fits 1”, 1 1/4”, 1 1/2” and 2” (Large)
Bonding Clamp

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VECTORFLEX™ SIZING WORKSHEET
Project:
VectorFlex™ Gas Line System Worksheet
Phone: Address: Date:
Description:
System Description:
Name of Run
Supply
Pressure
(lbs or in)
Length of
Run (ft)
Load of Run
(CFH)
Pressure
Drop (lbs
or in)
Tube
Diameter (in
or mm)
Delivery
Pressure (lbs
or in)
Notes
1
2
3
4
5
6
7
8
9
10
11
12
Sizing Worksheet

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SYSTEM INTRODUCTION & LAYOUT
3. SYSTEM CONFIGURATION
3.1 INTRODUCTION
This instructions and information found in the sections are intended to help in the design and sizing of a VectorFlex™ Gas
Line System.
System Requirements
• Determine the local piping restrictions prior to installing the flexible gas piping. Confirm that the local administrative
authority has accepted the use of flexible gas piping. Corrugated Stainless Steel Tubing has been accepted by all major
code bodies, but local or state adoption of these codes often lags behind. Check with the local administrative authority
or an authorized Easyflex® distributor for approval in your area.
• Determine metered (supply) pressure. A gauge can be used to measure the supply pressure or the utility will provide a
supply pressure rating.
• Determine appliance demand. Every appliance will have a manufacturer’s nameplate containing BTUH or CFH
requirements as well as minimum and maximum operating pressures.
• Create a drawing or sketch of the layout of the system, which includes locations of: meter, regulator(s), valves,
appliances, lengths or runs and the number and types of fittings.
• Refer to building plans or prepare a sketch showing the location of each appliance. When preparing this sketch
keep in mind the safest, easiest, and shortest distance locations to run the piping. Label the pipe segments and the
corresponding lengths.
Reference Data for Proper System Sizing
• Determine the total capacity needed for all appliances. The capacity tables within this guide or other approved CSST
tables should be used to determine pipe sizing needed to meet BTUH input load requirements. Refer to Section 7.0 for
gases with a specific gravity other than 0.60.
3.2 DETERMINING SYSTEM LAYOUT
[Table 3.1] Reference Data for Proper System Sizing
Pressure Conversion Factors Fuel Gas Information
1/4 psi = 6.921” WC = (Approx. 7” WC) Natural Gas Propane
1/2 psi = 13.842” WC = (Approx. 14” WC) BTU Per Cubic Foot 1,000 2516
1 psi = 27.684” WC = (Approx. 28” WC) Specific Gravity 0.6 1.52
2 psi = 55.368” WC = (Approx. 56” WC) Pressure Drop is expressed as Cubic Feet per Hour (CFH). To find CFH for
natural gas, divide BTU load by 1000. To find CFH for propane, divide BTU
load by 2516.
3 psi = 138.42” WC = (140” WC)

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SYSTEM L AYOUT
1. Series Systems
A series layout is the most common arrangement utilized for rigid pipe systems for low pressure. These usually consist
of a main run with tees branching off to each appliance. In a traditional series system, the service pressure downstream
of the meter is typically less than 1/2 PSI.
2. Parallel Systems
In a parallel system a main run from the meter supplies a central distribution manifold. The appliances are supplied by
individual runs from the manifold. The manifold is best located close to the greatest load.
3. Dual Pressure Systems
Elevated pressure systems (2 psi for residential and up to 5 psi for commercial installations) may be piped with one or
more house line regulators (house-to-inches) followed by a manifold and run to each of the appliances. A Dual Pressure
system incorporates two operating pressures downstream from the meter. The first pressure, set by the service
regulator at the meter, is usually 2 PSI but can be higher or lower depending on code restrictions and gas company
policy. This part of the system is sized separately and ends at the pounds-to-inches regulator inlet. The second pressure,
at the outlet of the pounds-to-inches regulator, is under 1/2 PSI; usually 8” WC for natural gas and 11” WC for propane
regulators. A parallel system requires a higher total footage of smaller diameter tubing and fewer fittings compared to a
series layout.
4. Multiple Manifold Systems
For those installations in which the energy load demand is large or the appliances are installed throughout the structure
with long distances from the meter, a multiple manifold system may be used. Separate manifolds are placed in practical
locations near high load appliances. Elevated pressure loads can be managed by regulators placed upstream of the
manifold locations. Elevated pressure systems are a safe, efficient method of providing for larger BTUH load demands
while maintaining smaller pipe diameters.
5. Elevated Pressure System
In a complete elevated pressure system, corrugated stainless steel tubing is used to deliver pressures in excess of
1/2 PSI to a pounds-to-inches regulator positioned directly in front of each appliance. This is an alternate method of
installation used to minimize pipe size on systems with high loads and/or long runs. Regulators shall be sized per the
largest single appliance.
Allowable Pressure Drop
Model codes are intended to help ensure that there is sufficient gas volume and pressure supplied to the appliance for
proper operation by designating pipe sizing guidelines. The Easyflex® tables below show low-pressure guidelines intended
for use at a system pressure of 1/2 PSI or less, which includes the range of utility pressures and equipment requirements
that are most often found in the field. To determine which table to use determine the system’s allowable pressure drop.
The appropriate pressure drop can be calculated by subtracting the appliance inlet pressure (typically 5” WC for NG, 10.5”
WC for LPG) from the gas source pressure (gas meter for NG, secondary regulator for LPG). Use the Easyflex® capacity
table labeled with the right allowable pressure drop and gas type. Increasing the available pressure drop will increase the
available BTUHs, thus decreasing pipe sizes. In system planning it is best to allow for a larger pressure drop to ensure good
supply and reduce mistakes in calculating.
The Summation Method of pipe sizing calculates the real pressure loss through each section of pipe. The sum of all the
losses is subtracted from the starting supply pressure to determine the inlet pressure to each appliance. The appliance inlet
pressure must be within the manufacturer’s listed range for proper operation. Pressures less than the typical minimums
may still allow the appliance to function, but always check the appliance manufacturer’s installation information and
specifications for the right pressure rating and be sure this complies with local codes for operation. Some new, higher
performance appliances require an inlet pressure greater than the typical minimums. Check the appliance manufacturers’
input rating before sizing.

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SYSTEM L AYOUT
Sizing Methods
Capacity Tables from this Guide or local code approved tables must be used when sizing a VectorFlex™ Gas Line System.
The sizing tables used in this guide include losses for four 90-degree bends, and two end fittings. Tubing runs with larger
numbers of bends and or fittings should be increased by a length of tubing created from the following equation. L =1.3 x N:
where “L” is additional length of tubing, and “N” is the number of additional fittings, or 90 degree bends. Easyflex’s Longest
Run tables and Total or Summation tables are produced from the same fluid flow equations. They will provide the same
results taking into account any rounding of distance or capacity. The testing was performed on actual VectorFlex™ CSST
and QuickFlare™ fittings, while tables in the code reflect the most restrictive CSST.
Longest Run Method
A modified version of the most common method (longest run) is presented here. This method may be used for any pressure
as listed in the appropriate Capacity Table. To size each length of pipe, determine the total gas load for all appliances
connected by that section and the maximum distance over which that particular section delivers gas. The maximum
distance includes overall length from the meter to the furthest appliance serviced by that run.
For sizing dual-pressure systems, the piping from the meter to the pounds-to-inches regulator is sized separately from the
piping downstream of the regulator outlet. This procedure is shown in Examples 4 & 5. Sizing for a Hybrid System (one that
includes both rigid pipe and CSST) is accomplished by using the longest run method to determine the appropriate pipe
size for a given load and run length. Each segment of the piping system uses the appropriate sizing table for that particular
piping material. This procedure is shown in Examples 6 and 7.
Simulation Method
An alternative sizing method is the Summation Method, which considers the sum or total of the pressure losses through
each section of piping. This procedure is for the designer whose requirements are not satisfied by the previously described
methods. The summation method can be used for system pressures and pressure drops other than indicated in the sizing
tables for longest run. This method allows full use of the maximum flow capacity of the CSST. A designer can minimize
piping size (or maximize flow capacity) with greater accuracy in more complicated arrangements.
QuickFlare™ fittings transition from CSST to pipe thread (NPT) and may be run in conjunction with all other approved fuel
gas piping (steel pipe, copper tubing, etc.). When adding appliances to an existing system the installer must verify whether
the existing system, upstream of the lines to be added, can support the additional load. A retrofitted line can adversely
affect all the other appliances in the system. Proper planning of the additions to the system and or additional appliances
serviced is required. The system components must be re-calculated to determine correct pipe size for the new line and
any other changes needed to provide correct flow. When the existing system will not support the additional load several
installation options are available. A new trunk line or lines can be run, replacing the under-sized system upstream of the
retrofitted appliances. A dedicated trunk line can be run from the gas source to the new appliance. The system pressure
may be elevated, which will increasing the allowable pressure drop, after which the existing trunk lines may provide higher
flow capacity to handle the existing and new appliances. If the piping is visible or the existing run lengths are known,
the entire system can be resized using either Longest Run or Summation methods. The system shall be resized with an
appropriate sizing table based on the pressure drop that the system supports. When the piping is not visible or accessible
for measurement, approximated lengths should be rounded up for calculations.

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SIZING PROCEDURES AND EXAMPLES
3.3 SIZING PROCEDURES AND EXAMPLES
3.3.1 LOW PRESSURE SYSTEMS
EXAMPLE 1: LOW PRESSURE SYSTEM, SERIES ARRANGEMENT
The figure below shows a typical single-family home installation with 5 appliances. The piping is arranged in series with a
main run branching to the appliances.
Parameters:
• Series system
• Natural gas
• Supply pressure: 1/4 psi (7” WC)
• Pressure drop: 0.5” WC
• Longest Run Method
i. Size Run “A”
• Run “A” is sized using the longest run from the meter that includes Section A and the total gas load of all appliances.
• The total load of all appliances: 40 +30 + 25 + 35 + 80 = 210 CFH.
• The run length to the Furnace (furthest appliance): 15 + 10 + 35 + 5 + 15 = 80 ft.
• Using Table 7A-1, locate 80 ft at the top row “Length of Tubing Run” and follow down to a capacity greater than or equal
to 210 CFH.
• 269 CFH is the closest value possible greater than 210 CFH. Follow that row to the left and locate the size of tubing.
• The correct size is 1 1/4” CSST.
ii. Size Run “B”
• Run “B” is sized by the load of the supplied appliance (Water Heater) and its run length from the meter.
• The load of the Water Heater is 40 CFH.
• The run length to the Water Heater: 15 + 5 = 20 ft.
• Refer to Table 7A-1 again by locating 20 ft length at the top row and follow down to a capacity greater than or equal to
40 CFH.
• 44 CFH is closest possible value greater than 40 CFH. Follow that row to the left and locate the size of tubing.
• The correct size is 3/8” CSST.
iii. Size Run “C”
• Run “C” sized using the longest run from meter that includes Section C and total gas load of all supplied appliances.
• The total load of all appliances: 30 + 25 + 35 + 80 = 170 CFH.
• The run length to the Furnace (furthest appliance): 15 + 10 + 35 + 5 + 15 = 80 ft.
• Refer to Table 7A-1. For a length of 80 ft, find a value greater than or equal to 170 CFH.
• 172 CFH is closest possible value. Follow that row to the left and locate the size of tubing.
• The correct size is 1” CSST.
iv. Size Run “D”
• Run “D” is sized by the load of the supplied appliance (Dryer) and its run length from the meter.
• The load of the Dryer is 30 CFH.
• The run length to the Dryer: 15 + 10+ 5 = 30 ft.
• Refer to Table 7A-1. For a length of 30 ft, find a value greater than or equal to 30 CFH.34 CFH is closest possible value.
Follow that row to the left and locate the size of tubing.
• The correct size is 3/8” CSST.

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SIZING PROCEDURES AND EXAMPLES
v. Size Run “E”
• Run “E” is sized using the longest run from the meter that includes Section E and the total gas load of all supplied
appliances.
• The total load of all appliances: 25 + 35 + 80 = 140 CFH.
• The run length to the Furnace (furthest appliance): 15 + 10 + 35 + 5 + 15 = 80 ft.
• Refer to Table 7A-1. For a length of 80 ft, find a value greater than or equal to 140 CFH.
• 172 CFH is closest possible value. Follow that row to the left and locate the size of tubing.
• The correct size is 1” CSST.
vi. Size Run “F”
• Run “D” is sized by the load of the supplied appliance (Oven) and its run length from the meter.
• The load of the Oven is 25 CFH.
• The run length to the Oven: 15 + 10+ 35 + 5 = 65 ft.
• Refer to Table 7A-1. For a length of 70 ft (next greater provided), find a value greater than or equal to 25 CFH.
• 42 CFH is closest possible value. Follow that row to the left and locate the size of tubing.
• The correct size is 1/2” CSST.
[Fig 3.1]
Meter
Water
Heater
Dryer
Oven Range
Furnace
A=15’
C=10’
E=35’
G=5’ I=15’
B=5’
D=5’
F=5’ H=5’
40k BTU
30k BTU
25k BTU 35k BTU
80k BTU
Example 1:Low Pressure System
Section Section Length Run Length Demand Tubing Size
A15’ 80’ 210 CFH = 210,000 BTUH 1¼”
B5’ 20’ 40 CFH = 40,000 BTUH 3/8”
C10’ 80’ 170 CFH = 170,000 BTUH 1”
D5’ 30’ 30 CFH = 30,000 BTUH 3/8”
E35’ 80’ 140 CFH = 140,000 BTUH 1”
F5’ 65’ 25 CFH = 25,000 BTUH 1/2”
G5’ 80’ 115 CFH = 115,000 BTUH 1”
H5’ 70’ 35 CFH = 35,000 BTUH 1/2”
I15’ 80’ 80 CFH = 80,000 BTUH 3/4”
[Table 3.2]