Watts 7 Series Instruction Manual

RP/IS-7
Installation, Maintenance, & Repair
Series 7 Dual Check Valves
LF7/7, LF7R, LF07S/07S, LF7C/7C, 7B, LFL7/L7, and LFCu7/Cu7
Sizes: 1⁄2"– 2"(15 – 50mm)
Water Meter
L7
to Sill Cock
Water
Supply
to Fire sprinklers
07S
Main
Supply
Water Pressure
Reducing Valve
1. Mark pipe as shown.
This is pipe insertion depth.
2. Clean pipe end.
3. If using PEX tubing, insert pipe stiff-
ener (provided) into end of pipe.
4. Push tubing into tailpiece up to mark.
5. Insert collet clip.
PEX tubing only
Pipe Stiffener
Tail Piece
11⁄2in. (38.1mm)
13⁄4in. (44.45mm)
17⁄8in. (47.63mm)
1⁄2in.Pipe (12.7mm)
3⁄4in.Pipe (19.05mm)
1 in.Pipe (25.4mm)
Quick-Connect Installation
To Connect:
You are required to thoroughly read all installation instructions and product
safety information before beginning the installation of this product. FAILURE
TO COMPLY WITH PROPER INSTALLATION AND MAINTENANCE IN-
STRUCTIONS COULD RESULT IN PRODUCT FAILURE WHICH CAN
CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/OR DEATH.
Watts is not responsible for damages resulting from improper installation
and/or maintenance.
Local building or plumbing codes may require modifications to the informa-
tion provided. You are required to consult the local building and plumbing
codes prior to installation. If this information is not consistent with local
building or plumbing codes, the local codes should be followed.
Need for Periodic Inspection/Maintenance: This product must be test-
ed periodically in compliance with local codes, but at least once per year
or more as service conditions warrant. Corrosive water conditions, and/or
unauthorized adjustments or repair could render the product ineffective for
the service intended. Regular checking and cleaning of the product’s inter-
nal components helps assure maximum life and proper product function.
WARNING
!
When a pressure reducing valve or dual check valve is installed in the
supple line, it creates a closed system which makes plumbing code
compliance imperative for system safety. Special attention must be
given by all concerned to assure pressure relief protection is provided
to protect water heater equipment. It is important to make certain an
approved ANSI Z21.22 temperature and pressure relief valve is installed
on the storage water heater. This device is designed for emergency
safety relief and should not be used as an operating control.
High System Pressure
If the downstream system pressure is higher than the set pressure
under a no flow condition, the cause could be thermal expansion.
Thermal expansion occurs whenever is heated in a closed system.
You must make provisions for thermal expansion protection of your
plumbing system and components when installing a pressure reducing
valve or dual check valve in the supply line.
The use of pressure relief valves such as *Watts 530C, *BRV,
*Governor 80, *3L and or a potable water expansion tank such as the
Watts DETA and PLT may be required.
To determine if this is the result of thermal expansion, try briefly open-
ing the cold water tap. If the increased pressure is caused
by thermal expansion, the pressure will immediately be
relieved and the system will return to the set pressure.
Watts offers a pressure test gauge, model 276H300 to
assist you in determining if you have high water pressure.
The 276H300 when attached to a hose bibb registers the
highest pressure reading over the period of time it is
left on the system.
*NOTE: The Watts 530C, BRV, Governor 80 and 3L
are not ASME approved safety relief valves. Under no
circumstances should these devices be used in place
of an ASME approved valve. Consult your local water
code authority to ensure installation compliance.
Watts product specifications in U.S. customary units and metric are approximate
and are provided for reference only. For precise measurements, please contact
Watts Technical Service. Watts reserves the right to change or modify product
design, construction, specifications, or materials without prior notice and without
incurring any obligation to make such changes and modifications on Watts prod-
ucts previously or subsequently sold.
Basic Installation Instructions
A. Watts dual check valves may be installed in either a vertical or a horizon-
tal position. Series 7 & LF7 should be installed downstream of the water
meter and of the water pressure regulator. All outlets including sill cocks
must be downstream of the Series 7. Model 07S & LF07S should be
installed at the fire sprinkler service connection to the main line.
B. They should always be installed in an accessible location to facilitate
the removal for servicing and testing.
C. Pipe lines should be thoroughly flushed to remove foreign material
before installing the unit.
D. Protect from freezing
E. Ensure that valve is installed in proper flow direction. Refer to flow
direction arrow on valve nameplate or body.
F. When installing valve in pipe line, only use wrenching flats provided.
Do not apply wrench to body of valve. This will prevent distorting the
valve body and component parts.
G. These valves incorporate an O-ring union seal that requires minimum
tightening of union nut. Do not overtighten.
H. These valves contain plastic check modules and should never be
directly sweated into the line. Sweat fit adapters should be sweated
into the line prior to valve installation.
I. Avoid improper application and excessive pipe sealants such as tef-
lon®tape and pipe dope.
1. Remove collet clip.
2. Depress collet.
3. Pull tubing from tailpiece.
To Disconnect:
Watts 276H300
WARNING
!

Inlet Outlet
1st Check Module
Check Covers
2nd Check Module
Series LFL7/L7
1. Remove the Series 7 from the line (union nut and adapter remain in
the line).
2. Remove the two check modules by pressing firmly from the outlet
end (end with wrench pads). O-ring seals will be removed with the
removal of modules from the body.
CAUTION:
To prevent damage to O-ring seals, do not attempt to pry the O-ring
seal free before removing check modules. NOTE: Complete check
module assemblies are available as replacement parts. It is recom-
mended that if check modules are fouled, that the entire check module
be replaced.
3. Inspect body bore and clean surfaces of any foreign material.
4. Using silicone grease, apply small amount to each exterior surface
of the O-ring seals. If O-ring is to be replaced, lubricate as above. A
light application of silicone grease to inlet of body bore is beneficial.
Do not lubricate seat of seat disc.
NOTE: Only FDA approved silicone grease should be used and is
furnished with each Watts Models LF7/7, LF07S/07S and LF7R dual
check repair kit.
5. Reinsert the check modules and O-rings into body in direction of flow.
NOTE 1: For the 1" and 1 1/4" 07S the spacer slots must be aligned
with the ribs of the first check module before inserting
NOTE 2: 1st and 2nd check modules are identical and interchangeable.
Do not overtighten union nut.
Servicing Valves LF7/L7
1. Shut off water at street side of meter.
2. Remove covers and remove Disc Assembly.
3. Inspect rubber disc for dirt or debris.
4. Clean and/or replace as needed.
5. Inspect machined seat area for nicks and mineral build up clean
with emery cloth.
6. Reassemble the check assembly in the reverse order. (1st and 2nd
check modules are identical and interchangeable)
Series LF7/7
Limited Warranty: Watts Regulator Co. (the “Company”) warrants each product to be free from defects in material and workmanship under normal usage for a period of one year from the date of
original shipment. In the event of such defects within the warranty period, the Company will, at its option, replace or recondition the product without charge.
THE WARRANTY SET FORTH HEREIN IS GIVEN EXPRESSLY AND IS THE ONLY WARRANTY GIVEN BY THE COMPANY WITH RESPECT TO THE PRODUCT. THE COMPANY MAKES NO OTHER
WARRANTIES, EXPRESS OR IMPLIED. THE COMPANY HEREBY SPECIFICALLY DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
The remedy described in the first paragraph of this warranty shall constitute the sole and exclusive remedy for breach of warranty, and the Company shall not be responsible for any incidental, special
or consequential damages, including without limitation, lost profits or the cost of repairing or replacing other property which is damaged if this product does not work properly, other costs resulting
from labor charges, delays, vandalism, negligence, fouling caused by foreign material, damage from adverse water conditions, chemical, or any other circumstances over which the Company has no
control. This warranty shall be invalidated by any abuse, misuse, misapplication, improper installation or improper maintenance or alteration of the product.
Some States do not allow limitations on how long an implied warranty lasts, and some States do not allow the exclusion or limitation of incidental or consequential damages. Therefore the above
limitations may not apply to you. This Limited Warranty gives you specific legal rights, and you may have other rights that vary from State to State. You should consult applicable state laws to
determine your rights. SO FAR AS IS CONSISTENT WITH APPLICABLE STATE LAW, ANY IMPLIED WARRANTIES THAT MAY NOT BE DISCLAIMED, INCLUDING THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED IN DURATION TO ONE YEAR FROM THE DATE OF ORIGINAL SHIPMENT.
1st Check Module 2nd Check Module
O-ring Module seal
Individual O-ring Check Seals
O-ring
Tailpiece
1st Check
Module 2nd Check
Module
Check Module
O-rings Body Union Nut
Tailpiece
O-ring
Kit for Valve LFL7/L7
ORDER CODE KIT NO. SIzE
in. mm
0886005 RK L7 T 3⁄4-1 20 – 25
Kit for Series LF7/7, LF07S/07S, LF7C/7C, 7B
and LFCu7/Cu7
ORDER CODE KIT NO. SIzE
in. mm
0886015 RK 7 T 1⁄2-11⁄4 715 – 32
1⁄2- 1 Cu7 15 – 25
0886017 RK 07S T 1 - 11⁄407S 25 – 32
0886016 RK 7B T 3⁄47B 20
0886018 RK A7 T 5⁄8- 3⁄417 – 20
0886009 RK 7/7C T 3⁄87/7C 10
0886007 LF RK 7R T 1⁄2- 1 15 – 25
0886006 LF RK 07S T 11⁄2- 2 40 – 50
Kit Includes: First and Second Check modules, O-rings and spacers if needed.
RP/IS-7 1209 EDP# 1910327 © 2012 Watts
USA: Tel. [phone] • Fax: [phone] • www.watts.com
Canada: Tel. [phone] • Fax: [phone] • www.wattscanada.ca
A Watts Water Technologies Company
Series LF7R
LEAD FREE*
LEAD
FREE*
Service, Replacement Parts and Maintenance
Series 7 Dual Check Valves
LF7/7, LF7R, LF07S/07S, LF7C/7C, 7B, and
LFCu7/Cu7