Install Instructions

ManualsBrandsWatts ManualsBackflow Preventers1-1/4" Lead Free Double Check Valve Assembly (LF007M2-QT)

Installation, Maintenance, & Repair

Series 007 and LF007

Double Check Valve Assemblies

Sizes:

⁄2" – 3" (15 - 80mm)

NOTE: For Australia and New Zealand, line strainers should be

installed between the upstream shutoff valve and the inlet of the

backﬂow preventer.

⁄4" 007M3QT

RP/IS-007

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 prod-

uct design, construction, speciﬁcations, or materials without

prior notice and without incurring any obligation to make such

changes and modiﬁcations on Watts products previously or

subsequently sold.

You are required to thoroughly read all installation instructions

and product safety information before beginning the installa-

tion of this product. FAILURE TO COMPLY WITH PROPER

INSTALLATION AND MAINTENANCE INSTRUCTIONS

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 information provided. You are required to consult the local

building and plumbing codes prior to installation. If this informa-

tion is not consistent with local building or plumbing codes, the

local codes should be followed.

Need for Periodic Inspection/Maintenance: This product

must be tested 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 in-

tended. Regular checking and cleaning of the product’s internal

components helps assure maximum life and proper product

function.

WARNING

Testing

For field testing procedure, send for IS-TK-DL, IS-TK-7,

IS-TK-9A, IS-TK-99E AND IS-TK-99D.

For other repair kits and service parts, send for PL-RP-BPD.

For technical assistance, contact your local Watts

representative.

Summary of content (8 pages)

PAGE 1
Installation, Maintenance, & Repair Series 007 and LF007 RP/IS-007 Double Check Valve Assemblies Sizes: 1⁄2" – 3" (15 - 80mm) ⁄ " 007M3QT 34 ! WAR NI NG 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 INSTRUCTIONS COULD RESULT IN PRODUCT FAILURE WHICH CAN CAUSE PROPERTY DAMAGE, PERSONAL INJURY AND/ OR DEATH.
PAGE 2
Installation Instructions Series 007 and LF007 ⁄ " - 2" (15 - 50mm) 12 Indoors - Figure 1 Figure 1 Check local codes for installation requirements. Pipe lines should be thoroughly flushed to remove foreign material before installing the unit. A strainer should be installed as shown, ahead of backflow preventer to prevent disc from unnecessary fouling. Install valve inline with arrow on valve body pointing in the direction of flow.
PAGE 3
Service, Replacement Parts and Maintenance Series 007 and LF007 Servicing the First and Second Check Valves NOTE: Before servicing, ensure supply water is turned off or shutoff valves are in the closed position. 1. Remove the cover, then remove the retainer from the body valve. The check valve modules can now be removed from the valve by hand or with a screwdriver. NOTE: For Series 007 and LF007 sizes 1⁄2" - 2" (15-50mm), the seats and springs of the first and second check modules are not interchangeable.
PAGE 4
Service, Replacement Parts and Maintenance Repair Kits Series 007 and LF007 O-rings Check Cage ⁄ " - 2" 12 Cover Cover O-ring Retainer When ordering, specify ordering code number, kit number and valve size ck he C nd Ordering code Kit No. Size in.
PAGE 5
Installation Instructions Series 007 and LF007 21⁄2" and 3" Indoors - Figure 4 Figure 4 Series 007 may be installed in either a vertical or horizontal position. Pipe lines should be thoroughly flushed to remove foreign material before installing the unit. A strainer should be installed as shown, ahead of backflow preventer to prevent disc from unnecessary fouling. Install valve inline with arrow on valve body pointing in the direction of flow.
PAGE 6
Servicing First and Second Check Valves Series 007 and LF007 21⁄2" and 3" 1. Remove cover bolts and cover. 2. Remove the retainer from the body bore. The check valve modules can now be removed from the valve by hand or with a screwdriver. 3. The check seats are attached to the cage with a bayonet type locking arrangement. Holding the cage in one hand, push the seat inward and rotate counterclock-wise against the cage. The seat, spring cage, spring and disc assembly are now individual components.
PAGE 7
Troubleshooting Guide Series 007 and LF007 Symptom Cause Solution 1. Check valve fails to hold a. Debris on check disc Disassemble and clean 1.0 PSID minimum sealing surface b. Leaking gate valve Disassemble and clean or repair c. Damaged seat disc or seat o-ring Disassemble and replace d. Damaged guide holding check open Disassemble clean or replace Disassemble and replace spring e. Weak or broken spring 2. Chatter during flow a.
PAGE 8
For additional information, visit our web site at: www.watts.com 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.