Viega MegaPress 304 User manual

Pocket GuideViega MegaPress® Stainless Systems

2PG-MP 724701 0919 MegaPress Stainless Systems
White dot on a Viega MegaPress 304 FKM 󶈵tting indicates Smart Connect technology with an FKM sealing element. A green dot on a Viega MegaPress 316 󶈵tting indicates Smart Connect technology with an EPDM sealing element. For a current list of applications, please visit www.viega.us/applications.
Viega. Connected in quality.Building on TraditionFounded 120 years ago, Viega is a privately owned, international group of companies. In the United States, Canada, Mexico, and Latin America, Viega specializes in plumbing, heating, and pipe joining technologies. The values of Viega’s founder, Franz-Anselm Viegener, are just as present today as they were when he started the company in 1899. Courage, passion, and innovative spirit are still the basics of Viega’s foundation.©2019, Viega®, MegaPress®, Smart Connect®, and XL® are registered trademarks of Viega GmbH & Co. KG. Viega: Connected in quality® is a trademark of Viega Holding GmbH & Co. KG. RIDGID® is a registered trademark of RIDGID, Inc.At Viega, safety is priority.Safe, certain, and secure, Viega 󶈵ttings are designed for peace of mind
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1. In MegaPress stainless 󶈵ttings, the 420 stainless steel grip ring’s teeth cut into the pipe and lock the 󶈵tting securely in place.
MegaPress 304 FKM ½" to 2" formerly MegaPress Stainless 304.MegaPress 304 FKM
2½" to 4" formerly MegaPress Stainless 304 XL.
MegaPress 316 ½" to 2" formerly MegaPress Stainless 316. MegaPress 316 2
½" to 4" formerly MegaPress Stainless 316 XL.
2. For ½" to 2" 󶈵ttings, a 304 stainless steel separator ring protects the sealing element from damage by creating a positive physical separation during installation. For 2½" to 4" 󶈵ttings, a PBT (Polybutylene Terephthalate) separator ring protects the sealing element.
3. The FKM sealing element in MegaPress 304 FKM 󶈵ttings and the EPDM sealing element in MegaPress 316 󶈵ttings ensure water-tight or air-tight connections.
In all MegaPress stainless 󶈵ttings, Viega’s unique, patented Smart Connect technology helps installers ensure that they have pressed all connections.

3PG-MP 724701 0919 MegaPress Stainless SystemsTable of ContentsIntroduction _____________________________________________________4MegaPress Stainless Systems _________________________________ 4System Data ____________________________________________________ 6Viega MegaPress 304 FKM Fitting Systems ______________________6Viega MegaPress 316 Fitting Systems ___________________________ 7Tech Data _______________________________________________________8Viega MegaPress 304 FKM 3-Piece Ball Valve, Model 4175.8 _______ 8Viega MegaPress 316 3-Piece Ball Valve, Model 5175.8 ___________9Product Instructions ____________________________________________10Viega MegaPress Stainless ½" to 2" Fittings _____________________10Viega MegaPress Stainless 2½" to 4" Fittings ____________________11Technical Information ___________________________________________12Approved Applications _______________________________________12Sealing Element Description __________________________________14Minimum Clearance Between Two Viega Press Connections _______15Viega MegaPress Stainless Steel Pipe Marking Guide _____________16No-Stop Couplings __________________________________________17Welding ___________________________________________________17General Installation Notes ____________________________________18De󶈶ection __________________________________________________19Tool Clearances ____________________________________________20Pressing with Ring and Actuator in Tight Quarters ________________22Dimensional Documentation ____________________________________23MegaPress Stainless ½" to 2" _________________________________23MegaPress Stainless 2
½" to 4" ________________________________29
Frequently Asked Questions_____________________________________35Limited Warranty _______________________________________________36Viega Metal Systems for Industrial Applications __________________36Viega Marine Applications ____________________________________38Viega products are designed to be installed by licensed and trained plumbing and mechanical professionals who are familiar with Viega products and their installation. Installation by non-professionals may void Viega LLC’s warranty.This document is subject to updates. For the most current Viega technical literature please visit www.viega.us.DANGER!Read and understand all instructions for installing Viega MegaPress stainless 󶈵ttings. Failure to follow all instructions may result in extensive property damage, serious injury, or death.

4PG-MP 724701 0919 MegaPress Stainless SystemsIntroductionMegaPress Stainless SystemsViega MegaPress stainless systems can help reduce installation time up to 90 percent compared to traditional methods of pipe joining. Soldering and welding can be messy and time consuming, and connections are not always reliable. With Viega press technology, installers can make consistent, secure press connections in a matter of seconds, without 󶈶ame or heavy equipment. The 󶈵ttings require no soldering or welding and are installed with electro-hydraulic press tools (battery-powered or corded press tools).Viega MegaPress stainless 󶈵ttings can be customized for a wide variety of applications in industrial, commercial, or residential projects.Fire Protection You Can Count OnWith FM and UL certi󶈵cation for MegaPress
½" to 2" sizes , with 2½" to 4"
sizes soon to be added to the listing, Viega is introducing the latest press system for the 󶈵re protection market. Viega MegaPress 304 FKM and 316 󶈵ttings can be used in prefabricated assemblies, producing a straight, clean installation.Backed by a written, limited warranty and approved for NFPA 13, 13D, and 13R 󶈵re sprinkler systems, MegaPress stainless can be installed in industrial applications or commercial projects like hotels and dorms. With Viega’s patented cold-press technology, installations in attics and tight corners are safer than with traditional joining methods. Installers don’t need to carry heavy equipment or bother with metal shavings or cutting oils.

Introduction5PG-MP 724701 0919 MegaPress Stainless Systems
Locating unpressed connections is an important step in the pressure testing process. Viega MegaPress stainless includes Smart Connect technology, providing quick and easy identi󶈵cation of unpressed connections during a pressure test.
Smart Connect technology is an integral part of the design of the 󶈵tting, providing a path for liquids and/or gases from inside the system past the sealing element of an unpressed connection. When pressed according to our Product Instructions, the 󶈶uid path is altered, creating a leak-proof, reliable connection. 3Viega MegaPress
stainless connections
are fast, flameless,
and reliable.
Unpressed connections are located by pressurizing the system with air or water. When testing with water the proper pressure range is 15 to 85 psi. Pressure testing with air can be dangerous at high pressures. When testing with compressed air the proper pressure range is ½ to 45 psi. Following a successful Smart Connect test, the system may be pressure tested up to 600 psi maximum for water and 200 psi maximum for air if required by local code requirements.
1Identify an unpressed
connection during
pressure testing
when water flows past the
sealing element.
2Upon identification,
use the press tool
to press the fitting,
making a secure, leak-
proof connection.
Smart Connect Technology – Security Under Pressure

6PG-MP 724701 0919 MegaPress Stainless SystemsSystem DataViega MegaPress 304 FKM 󶈵ttings are designed to be used with o󶈴-the-shelf Schedule 10 to Schedule 40 stainless steel pipe to form a complete press system that is ideal for industrial applications. A Viega MegaPress 304 FKM system can stand up to harsh environments while transporting process water, diesel fuel, lube oil, ammonia, low pressure steam, or any number of other essential 󶈶uids or gases.
Viega MegaPress 304 FKM 󶈵ttings in sizes from ½" to 4" are o󶈴ered in con󶈵gurations including: elbows, couplings, reducers, tees, reducing tees, threaded adapters, unions, caps, and 󶈶anges.
Components ■Alloy: 304 stainless steel ■FKM sealing element ■420 stainless steel grip ring ■304 stainless steel separator ring for ½" to 2" 󶈵ttings ■PBT separator ring for 2½" to 4" 󶈵ttingsOperating Parameters ■Operating Pressure: 200 psi maximum ■Test Pressure: 600 psi maximum ■Operating Temperatures: 14°F to 284°F (with temperature spikes up to 356°F)Listings and Certi󶈵cates ■ABS type approval ■ASME B31.1, B31.3, B31.9 ■BV (Bureau Veritas) ■CRN 13492.5 A/B/C ■DNV-GL ■FM Class 1920 ■IAPMO PS-117 ■ICC-ES LC1002 ■Lloyds Register ■NFPA 13, 13D, 13R ■UL/ANSI 213 ■ ULC/ANSI ORD-C213The use of the system for applications other than those listed or outside of these parameters must be approved by the Viega Technical Services Department.Compliant with: ■ASME B31 ■ASTM A312 ■ASTM A554
■IAPMO Uniform Mechanical Code (UMC)
■ICC International Mechanical Code (IMC) ■ICC International Residential Code (IRC)
■National Building Code of Canada (NBCC)
■National Plumbing Code of Canada (NPCC)
Approved Applications ■Process water (non-potable) ■Low pressure steam ■Industrial gases ■Compressed air (no oil) ■Lube oil ■Caustic solutions ■Acid solutions ■VacuumFor more speci󶈵c information on applications for MegaPress 304 FKM, contact Viega Technical Services at 1-800-976-9819.
Viega MegaPress 304 FKM systems are approved for underground use. When installed underground, Viega MegaPress 304 FKM should have proper corrosion protection in accordance with local and national codes.
Recommended Tools ■Standard size press tool (minimum hydraulic ram output of 7200 lbs.)
■#56013 MegaPress jaw/ring kit ( ½" to 2")
■#26200 MegaPress XL PressBooster with 2½" press ring ■#26201 MegaPress XL 3" and 4" press ring kitViega MegaPress 304 FKM Fitting Systems

System Data7PG-MP 724701 0919 MegaPress Stainless SystemsIt is the responsibility of the installer or any other parties to adhere to all applicable local rules and regulations governing the nature of the installation.Viega MegaPress 316 󶈵ttings are designed to be used with standard IPS ASTM A312 Schedule 10 to Schedule 40 stainless steel pipe and are ideal for industrial applications. A Viega MegaPress 316 system can stand up to harsh environments while transporting process water, potable water, ammonia, low pressure steam, or any number of other essential 󶈶uids or gases.
Viega MegaPress 316 󶈵ttings in sizes from ½” to 4” are o󶈴ered in con󶈵gurations including: elbows, couplings, reducers, tees, reducing tees, threaded adapters, unions, caps, and 󶈶anges.
Components ■Alloy: 316 stainless steel ■EPDM sealing element ■420 stainless steel grip ring ■304 stainless steel separator ring for ½" to 2" 󶈵ttings ■PBT separator ring for 2½" to 4" 󶈵ttingsOperating Parameters ■Operating Pressure: 200 psi maximum ■Test Pressure: 600 psi maximum ■Operating Temperature: 0°F to 250°FListings and Certi󶈵cates ■ABS type approval ■ASME B31.1, B31.3, B31.9 ■BV (Bureau Veritas) ■CRN 13492.5 A/B/C ■DNV-GL ■FM Class 1920 ■IAPMO PS-117 ■ICC-ES LC1002 ■Lloyds Register ■NFPA 13, 13D, 13R ■NSF/ANSI 61 ■NSF/ANSI 372 ■UL/ANSI 213 ■ ULC/ANSI ORD-C213Compliant with:
■ASME B31 ■ASTM A312 ■ASTM A554 ■IAPMO California Plumbing Code (CPC)
■IAPMO National Standard Plumbing Code (NSPC)
■IAPMO Uniform Mechanical Code (UMC) ■IAPMO Uniform Plumbing Code (UPC) ■ICC International Mechanical Code (IMC) ■ICC International Plumbing Code (IPC) ■ICC International Residential Code (IRC)
■National Building Code of Canada (NBCC)
■National Plumbing Code of Canada (NPCC
Approved Applications: ■Process water (non-potable) ■Low pressure steam ■Industrial gases ■Potable water ■Caustic solutions ■Acid solutions ■VacuumFor more speci󶈵c information on applications for MegaPress 316, contact Viega Technical Services at 1-800-976-9819.
Viega MegaPress 316 systems are approved for underground use. When installed underground, Viega MegaPress 316 should have proper corrosion protection in accordance with local and national codes.
Recommended Tools ■Standard size press tool (minimum hydraulic ram output of 7200 lbs.)
■#56013 MegaPress jaw/ring kit ( ½" to 2")
■#26200 MegaPress XL PressBooster with 2½" press ring ■#26201 MegaPress XL 3" and 4" press ring kitViega MegaPress 316 Fitting Systems

8PG-MP 724701 0919 MegaPress Stainless SystemsTech DataThe MegaPress 304 FKM 3-piece stainless steel ball valve is equipped with a full port, 316 stainless steel 3-piece body, and 304 stainless steel press ends. The ball valve features an FKM sealing element, a 420 stainless grip ring, a 304 stainless separator ring, PTFE stem seals, a locking metal handle, and Viega’s Smart Connect technology for easy identi󶈵cation of unpressed connections during pressure testing.Viega MegaPress 304 FKM 3-Piece Ball Valve, Model 4175.8Features ■316 stainless steel ball ■Blowout-proof 316 stainless steel stem ■304 stainless steel locking handle ■Adjustable packing nut ■Reinforced PTFE seats ■Smart Connect technology ■ISO 5211 mounting padRatings ■Max Operating Pressure: 250 CWP ■Operating Temperatures: 14°F to 284°F (with temperature spikes up to 356°F)Approvals ■Conforms to MSS SP-110 ■ASME B31 ■IAPMO Z1157Viega MegaPress 304 FKM 3-Piece Stainless Steel Ball Valve - Model 4175.8Part No.Size (in)A (in)L (in)L1 (in)H (in)H1 (in)186500½1.722.805.882.851.0486505¾1.913.065.882.931.168651012.193.547.543.331.40865151¼2.504.317.543.571.57865201½2.924.797.543.891.838652523.095.077.543.891.83Valve Size (in)Valve Body Bolt & Nut SizeBolt Torque +/- 5Valve Stem Nut SizeStem Nutft/lbs(Nm)ft/lbs(Nm)½M8 x 55M87.5(10)AF 16 mm7.510¾M8 x 65M815(20)AF 18 mm11151M10 x 75M1015(20)AF 21 mm11151¼M10 x 90M1022.5(30)AF 22 mm18.5251½M10 x 100M1022.5(30)AF 24 mm18.5252M10 x 100M1022.5(30)AF 24 mm18.525""""
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Tech Data9PG-MP 724701 0919 MegaPress Stainless SystemsThe MegaPress 316 3-piece stainless steel ball valve is equipped with a full port, 316 stainless steel 3-piece body, and stainless steel press ends. The ball valve features an EPDM sealing element, a 420 stainless grip ring, a 304 stainless separator ring, PTFE stem seals, a locking metal handle, and Viega’s Smart Connect® technology for easy identi󶈵cation of unpressed connections during pressure testing.Viega MegaPress 316 3-Piece Ball Valve, Model 5175.8Features ■316 stainless steel ball ■Blowout-proof 316 stainless steel stem ■304 stainless steel locking handle ■Adjustable packing nut ■Reinforced PTFE seats ■Smart Connect technology ■ISO 5211 mounting padRatings ■Max Operating Pressure: 250 CWP ■Operating Temperatures: 0°F to 250°FApprovals ■Conforms to MSS SP-110 ■ASME B31 ■IAPMO Z1157 ■NSF 61-372Viega MegaPress 316 3-Piece Stainless Steel Ball Valve - Model 5175.8Part No.Size (in)A (in)L (in)L1 (in)H (in)H1 (in)186530½1.722.805.882.851.0486535¾1.913.065.882.931.168654012.193.547.543.331.40865451¼2.504.317.543.571.57865501½2.924.797.543.891.838655523.095.077.543.891.83Valve Size (in)Valve Body Bolt & Nut SizeBolt Torque +/- 5Valve Stem Nut SizeStem Nutft/lbs(Nm)ft/lbs(Nm)½M8 x 55M87.5(10)AF 16 mm7.510¾M8 x 65M815(20)AF 18 mm11151M10 x 75M1015(20)AF 21 mm11151¼M10 x 90M1022.5(30)AF 22 mm18.5251½M10 x 100M1022.5(30)AF 24 mm18.5252M10 x 100M1022.5(30)AF 24 mm18.525""""----))))
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10PG-MP 724701 0919 MegaPress Stainless SystemsProduct InstructionsViega MegaPress Stainless ½" to 2" Fittingsd
78a8b8c56613241 Cut piping at right angles using displacement-type cutter. 2 Keep end of piping a minimum of 4" away from the contact area of the vise to prevent possible damage to the piping.3 Deburr inside and outside of the pipe and prep to proper insertion depth using a preparation tool or fine-grit sandpaper.4 Check seal and grip ring for correct fit. Do not use oils or lubricants.5 Illustration demonstrates proper fit of grip ring, separation ring, and sealing element.6 Mark proper insertion depth. Improper insertion depth may result in an improper seal. The depth marking must be visible on the completed assembly.
Minimum Insertion Depth for MegaPress Stainless
Pipe Size½"¾"1"1¼"1½"2"Insertion Depth11
/
16"13
/
16"1⅜"113
/
16"1⅞"2"7 Refer to chart on page 15 for minimum distance between fittings. To ensure a correct press, a minimum distance between press fittings must be maintained. Failure to provide this distance may result in an improper seal. 8a Viega MegaPress stainless ½" to 1" fitting connections must be performed with MegaPress jaws.WARNING!Keep extremities and foreign objects away from press tool during pressing operation to prevent injury or incomplete press.9a9b9c108b Open the MegaPress jaw and place at right angles on the fitting. Visually check insertion depth using mark on piping.8c
Start pressing process and hold the trigger until the jaw has engaged the fitting.
9a MegaPress stainless 1¼" to 2" fitting connections must be performed with MegaPress rings and V2 Actuator.9b Open MegaPress ring and place at right angles on the fitting. MegaPress ring must be engaged on the fitting bead. Check insertion depth.9c
Place V2 Actuator onto MegaPress ring and start pressing process. Hold the trigger until the Actuator has engaged the MegaPress ring.
10 Remove MegaPress jaw from fitting or release V2 Actuator from MegaPress ring and then remove MegaPress ring from the fitting. Remove control label to indicate press has been completed.

Product Instructions11PG-MP 724701 0919 MegaPress Stainless SystemsViega MegaPress Stainless 2½" to 4" Fittings1243678910x2-3
1151 Cut piping at right angles using displacement-type cutter.2
Keep end of piping a minimum of 4" away from the contact area of the vise to prevent damage to the piping in the press area.
3 Deburr inside and outside of piping and prep to proper insertion depth using a preparation tool or fine-grit sandpaper.4 Illustration demonstrates proper fit of grip ring, separation ring, and sealing element.5 Mark the proper insertion depth on the outside of the pipe (see table below). Improper insertion depth may result in an improper seal. The depth marking should be visible on the completed assembly.
Minimum Insertion Depth for MegaPress Stainless
Pipe Size2½"3"4"Insertion Depth113
/
16"25
/
16"3⅛"6 While turning slightly, slide press fitting onto the pipe to the marked insertion depth. End of pipe must contact stop.WARNING!Keep extremities and foreign objects away from press tool during pressing operation to prevent injury or incomplete press.8 Open MegaPress ring and place at right angles on the fitting. MegaPress ring must be engaged on the fitting bead. Check insertion depth.9 Remove the retaining bolt of the press machine. Slide the PressBooster in via the press jaw fixture.10
Place PressBooster/Z3 Actuator onto MegaPress XL rings and start pressing process. Hold the trigger until the Actuator has engaged the MegaPress ring.
11 The PressBooster requires two presses of the trigger to execute a complete press. A third press may be needed to initiate a release cycle to reset the rollers back to the original position. 7 Viega MegaPress stainless 2½" to 4" fitting connections must be made using MegaPress XL rings and a PressBooster/Z3 Actuator.

12PG-MP 724701 0919 MegaPress Stainless SystemsTechnical InformationTypes of ServiceSystem Operating ConditionsMegaPress 304 FKMMegaPress 316CommentsPressureTemperatureFKMEPDM
Fluids/Water
Hot and Cold Potable Water200 psi32˚F to 250˚F√Rainwater/Gray Water200 psiAmbient√Fire SprinklerNFPA 13, 13D, 13R 175 psi Ambient√Chilled Water Ethylene Glycol / Propylene Glycol200 psi0˚F to 250˚F√√Hydronic Heating Ethylene Glycol / Propylene Glycol200 psi0˚F to 250˚F√√Cooling WaterUp to 50% Ethylene Glycol or Propylene Glycol Solution200 psi0˚F to 250˚F√√Deionized Water200 psiMax 230˚F√Low Pressure SteamMax 15 psiMax 250˚F√√Isopropyl Alcohol200 psiAmbient√√ Latex Paint200 psi32˚F to 250˚F√Methyl Ethyl Ketone200 psiMax 100˚F√Nitric Acid200 psiAmbient√√Phosphoric Acid200 psiAmbient√Paraffin Wax200 psiMax 100˚F√Fuel, Oil, and LubricantHeating Fuel Oil125 psiMax 100˚F√Diesel Fuel125 psiMax 100˚F√EthanolPure Grain Alcohol200 psiAmbient√Kerosene125 psiMax 68˚F√Lube OilPetroleum Based200 psiMax 150˚F√Mineral Oil200 psiAmbient√
Approved Applications

Technical Information13PG-MP 724701 0919 MegaPress Stainless SystemsTypes of ServiceSystem Operating ConditionsMegaPress 304 FKMMegaPress 316CommentsPressureTemperatureFKMEPDM
GasesCompressed Air Less than 25mg/m
3
Oil Content200 psiMax 140˚F√√Compressed AirMore than 25mg/m
3
Oil Content200 psiMax 140˚F√Oxygen - O2 (nonmedical)Keep Oil and Fat Free/Non-Liquid O2140 psiMax 140˚F√√Nitrogen - N2200 psiMax 140˚F√√AmmoniaAnhydrous200 psiMax 120˚F√Acetylene20 psiAmbient√√ArgonWelding Use200 psiMax 140˚F√√Hydrogen - H2125 psiMax 140˚F√Vacuum29.2" of HgMax 160˚F√√
It is recommended that all systems be clearly labeled with the fluid or gas being conveyed. For further information please consult Viega Technical Services.All Viega systems must be used with the manufacturer’s recommended sealing element. Contact your local Viega representative or Viega Technical Services for application temperature, pressure, and concentration limits.

Technical Information14PG-MP 724701 0919 MegaPress Stainless SystemsSealing Element DescriptionFKM Sealing ElementMegaPress 304 FKM press 󶈵ttings are manufactured with an FKM sealing element installed at the factory. FKM is well known for its excellent resistance to petroleum products and solvents as well as exceptional high-temperature performance, which make it ideal for seals and gaskets in solar, district heating, low pressure steam, and compressed air systems.De󶈵nition: FKMFluoroelastomer, dull black in colorMaximum Pressure: 200 psiOperating Temperature: 14°F to 284°F (with temperature spikes up to 356°F)The FKM sealing element is a special-purpose elastomer typically installed where higher temperatures are required. It possesses excellent resistance to aging, ozone, sunlight, weathering, environmental in󶈶uences, and oils and petroleum-based additives.EPDM Sealing ElementMegaPress 316 press 󶈵ttings are manufactured with an EPDM sealing element installed at the factory. The EPDM sealing element is used mainly for potable water, hydronic heating, low pressure steam, 󶈵re sprinkler, and compressed air installations.De󶈵nition: EPDMEthylene-Propylene-Diene-Monomer, gloss black in colorMaximum Pressure: 200 psiOperating Temperature: 0°F to 250°FThe EPDM sealing element is a synthetically manufactured and peroxidically cross-linked, general-purpose elastomer with a wide range of applications. It is resistant to aging, ozone, sunlight, weathering, environmental in󶈶uences, chemicals, and most alkaline solutions.The EPDM sealing element is used mainly in the applications of hydronic heating, chilled water, and 󶈵re sprinkler installations. It is not resistant to hydrocarbon solvent solutions, oils, chlorinated hydrocarbons, turpentine, and gasoline.

Technical Information15PG-MP 724701 0919 MegaPress Stainless SystemsMinimum Clearance Between Two Viega Press ConnectionsViega MegaPress StainlessTubing Diameter (in)Minimum Clearance (in)Minimum Clearance (mm)½¼5¾¼51¼51¼½101½½102½102½½103½104½10minimum
distance

Technical Information16PG-MP 724701 0919 MegaPress Stainless SystemsViega MegaPress Stainless Steel Pipe Marking GuideGuide to the ANSI A13.1 Standard for the Identi󶈵cation of Pipes
Usage Material PropertiesType of Application(typical)Color SchemeHazardous Materials ■Flammable or Explosive ■Chemically Active or Toxic ■Radioactive ■Extreme Temperature/Pressure ■Process Piping ■High-Pressure Steam ■Acids/CorrosivesYELLOW ON BLACKLow Hazard Materials (Liquid) ■Liquid ■Liquid Admixture ■Cooling Water ■Grey Water ■Chilled WaterWHITE ON GREENLow Hazard Materials (Gas) ■Gas ■Gas Admixture ■Compression Air ■Nitrogen (N2) ■Argon (Ar)WHITE ON BLUEFire Suppression ■Liquid ■Gas ■Foam ■Sprinklers (Wet/Dry) ■CO2 ■Foam (AFFF)WHITE ON REDViega MegaPress stainless ½" to 4" 󶈵ttings are compatible with ASTM A312 stainless steel pipe. All Viega MegaPress stainless piping systems should be continuously marked in accordance with ANSI A13.1 or as required by the local authority having jurisdiction.Pipe O.D. Including CoveringMinimum Length of Label Field ColorMinimum Height of Letters¾" to 1¼"19 mm to 32 mm8"203 mm½"13 mm1½" to 2"38 mm to 51 mm8"203 mm¾"19 mm2½" to 4"64 mm to 108 mm12"305 mm1¼"32 mmMarker Placement ■At all changes in direction ■At both sides of any penetrations (valves, 󶈶anges, tees, etc.) ■At frequent intervals on straight run (50 feet is typical) ■Locate pipe markers so they are readily visible ■Provide arrows indicating direction of 󶈶owNote: This guide is for general information purposes only. Pipe markings shall be in accordance with local code requirements.

Technical Information17PG-MP 724701 0919 MegaPress Stainless SystemsNo-Stop CouplingsNo-stop couplings and extended no-stop couplings are often used to conduct repairs. Without a stop, these couplings can slide completely onto a pipe and allow a connection to be made in tighter spaces. Unlike 󶈵ttings with an integrated stop that have a minimum insertion depth, no-stop couplings have minimum and maximum allowable insertion depths. The minimum and the maximum insertion depths should be marked and a line should connect the two marks. Drawing a line between the minimum and maximum insertion marks distinguishes a good connection on a no-stop coupling from a bad connection on a coupling with a stop.Viega MegaPress Stainless No-Stop CouplingsPipe DiameterMinimum InsertionMaximum Insertionininmminmm½11
/
16271⅝41¾13
/
1629113
/
164611⅜34115
/
16491¼113
/
16462½631½1⅞482¾7022502¾702½113
/
16463⅛79325
/
1659311
/
169343⅛804⅜120Welding
The following requirements must be considered when welding in the same vicinity as Viega MegaPress stainless 󶈵ttings.
Welding Adjacent to a Press FittingTo prevent damage to the sealing element, maintain proper welding distances from the 󶈵tting. If welding adjacent to the connection, weld a minimum of four inches away.Welding In Line with a Press FittingTo prevent damage to the sealing element, maintain proper welding distances from the 󶈵tting. If welding in line with the connection, weld a minimum of three feet away from the connection to protect the sealing element.Welding RequirementsThe installer should take precautions to keep the MegaPress stainless connection cool: ■Wrap the connection with a cold, wet rag. ■Protect the connection with a weld blanket. ■Prefabricate solder connections/welded 󶈵ttings prior to installing the press 󶈵tting. (Ensure pipe has cooled before installing the press 󶈵tting.) ■Apply heat sink gel or spray or spot freezing.

Technical Information18PG-MP 724701 0919 MegaPress Stainless SystemsGeneral Installation NotesExpansionThermal expansion in installed systems generates stress on pipes and appliance connectors. Compensation must be allowed for expansion and contraction that may occur within the piping system. Expansion joints or mechanical expansion compensators may be used to alleviate these stresses.Electrical BondingWhen properly installed, MegaPress stainless 󶈵ttings comply with Section 1211.15 Electrical Bonding and Grounding of the Uniform Plumbing Code.The mechanical press provides continuous metal-to-metal contact between 󶈵tting and pipe. The press ensures the continuity of the bonding through this contact.Exposure to Freezing TemperaturesViega MegaPress 316 systems with EPDM sealing elements can be installed in ambient temperatures down to 0°F. The FKM sealing element available with Viega MegaPress 304 FKM 󶈵ttings can be installed in ambient temperatures down to 14°F. When the contents could freeze, piping must be protected per acceptable engineering practices, codes, and as required by local code.Underground InstallationsViega MegaPress stainless 󶈵tting systems and stainless pipe are approved for underground installations. However, installations must meet all state and local codes, including those for underground. Proper authorization must be obtained prior to installation from the Authority Having Jurisdiction.Corrosion Protection
Viega MegaPress stainless 󶈵ttings exposed to corrosive action, such as soil conditions or moisture, must be protected in an approved manner in accordance with NACE Standard RP0169-2002 Section 5, 2009 UPC Chapter 6 Section 609.3.1, 2009 UMC Chapter 13 Section 1312.1.3, and in a manner satisfactory to local code requirements. Care should be taken to select hangers of suitable material that is galvanically compatible with the piping system. In addition, systems should be properly sized to minimize the risk of erosion corrosion resulting from excessive velocities.
Pressure Surges ■Pressure surges or transients from fast-acting valves, pump surges, and other sources that result in water hammer may cause damage to many system components, including press 󶈵ttings.
■When fast-acting valves and/or pumps are incorporated into a system, the designer and installer should isolate press 󶈵ttings from sharp pressure surges.
Transition Fittings – ThreadedViega MegaPress stainless systems can be joined with o󶈴-the-shelf threaded 󶈵ttings made of non-ferrous metals. In this regard: ■The threaded connection is made 󶈵rst. ■The press connection is made second.This process avoids unnecessary torsion on the press 󶈵tting.Transition Fittings – FlangeWhen using Viega 󶈶anges, bolt the 󶈶ange end in place prior to pressing the 󶈵tting to the pipe.Rotating a Pressed FittingOnce a MegaPress stainless 󶈵tting has been pressed, it can be rotated (not by hand), but once rotated more than 󶈵ve degrees, the 󶈵tting should be re-pressed to restore resistance to rotational movement. If the 󶈵tting is re-pressed, care should be taken to align the 󶈶at sides on the jaw with those on the 󶈵tting.

Technical Information19PG-MP 724701 0919 MegaPress Stainless SystemsDeflectionThe pressing process can cause de󶈶ection (angular misalignment) to occur. When pressing Viega MegaPress stainless 󶈵ttings in a system, the deformation of the 󶈵tting is constant. This allows for a consistent leak-free joint every time and is a result of the pressing technique.De󶈶ection occurs in the same way for every 󶈵tting. The 󶈵tting being pressed will move in the direction of the jaw or ring opening. ■Since the 󶈵tting will de󶈶ect toward the opening of the jaw or ring, the pipe end will de󶈶ect in the opposite direction. ■By counteracting the 󶈵tting movement, one can minimize the de󶈶ection of the 󶈵tting and ultimately the pipe. ■When using strut and clamps, de󶈶ection is minimized and nearly eliminated depending on clamp spacing.Alternate Sides for Presses ■Press one end of 󶈵tting. ■Make second press on other end of 󶈵tting from the opposite side.Push-Pull Method ■Rings = Push on press tool. ■Jaws = Pull on press tool. The press tool can be feathered using the trigger as needed to apply pulling or pushing force to control de󶈶ection.Re-Press ■Press the 󶈵tting, once on each side (that is, re-press the 󶈵tting a second time on the opposite side). ■Pressing the same connection from the opposite side will usually straighten misalignment between the pipe and 󶈵tting. ■When pressing overhead piping, it may be inconvenient to alternate sides for each press. ■The natural weight of the piping plus pressing on opposite sides at a 45-degree angle should adequately eliminate de󶈶ection. ■This technique can also be used for any horizontal piping and when working above the piping.Controlling De󶈶ectionDe󶈶ection while pressing can be minimized by utilizing the following installation practices.

Technical Information20PG-MP 724701 0919 MegaPress Stainless SystemsTool Clearances
Minimum distances should be taken into consideration during planning in order to avoid space constraints during installation.
Ensure that the space required for system pressing tools is available if Viega MegaPress stainless 󶈵ttings will be installed immediately upstream or downstream from wall or 󶈶oor penetrations.Pipe DiameterA minimum B minimum ½"12⅝"¾"1¼"3⅛"1"1¾"3⅝"
MegaPress Distance Requirements for Press Jaws Between Pipes and Walls
Pipe DiameterMinimum space requirement, amin for press toolsRIDGID RP 330-B, 330-C, and 340-B Press Tool½" to 1"1⅞"1¼" to 2"¾"2½" to 4"¾"MegaPress Standard Jaws ClearanceMegaPress Compact Jaws ClearancePipe DiameterA minimum B minimum ½"1¼"2⅞"¾"1⅛"3"