Servicing First and Second Check Valves
Series 007 and LF007
2
1
⁄
2
" and 3"
Seat
Seat
O-ring
Disc
Assembly
Spring
Retainer
Caps/
Seat
Cover
Cover O-ring
Retainer
Body
First Check
Second Check
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.
4. The disc assembly may now be cleaned and reassembled or
depending on its condition, may be discarded and replaced with
a new assembly from the repair kit. O-rings should be cleaned or
replaced as necessary. For more information, refer to repair parts
price list PL-RP-BPD.
5. Reassemble the Check valve modules. Check modules are
installed in the valve body with the seats facing the valve inlet.
The modules must be securely in place before the retainer can
be replaced.
No special tools required to service Series 007 and LF007.
Symptom
Cause
Solution
1. Check valve fails to hold
1.0 PSID minimum
a. Debris on check disc sealing surface
Disassemble and clean
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 and clean or replace
e. Weak or broken spring
Disassemble and replace spring
2. Chatter during flow
conditions
a. Worn, damaged or defective guide
Disassemble and repair or replace guide
3. Low flows passing through
mainline valve
a. Mainline check fouled
Disassemble and clean
b. Meter strainer plugged
Disassemble and clean
c. Damaged mainline seat disc or seat
Disassemble and replace
d. Broken mainline spring
Disassemble and replace
Check Assemblies
Troubleshooting Guide —
Series 007 and LF007
For repair kits and parts, refer to our Backflow
Prevention Products Repair Kits & Service Parts
price list PL-RP-BPD found on
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.
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.
RP-IS-007 2020
EDP# 1915216
© 2020 Watts
USA:
T: (978) 689-6066 • F: (978) 975-8350 • Watts.com
Canada:
T: (888) 208-8927 • F: (888) 479-2887 • Watts.ca
Latin America:
T: (52) 55-4122-0138 • Watts.com
