7
Parts
For repair kits and parts, refer to the Backflow
Prevention Products, Repair Kits, and Parts
PL-AMES price list at watts.com.
O-ring, Inlet Coupler
Spider Bushing
Spring
Piston Assembly
Cover Screw
Relief Valve Assembly
Retainer E-Clip
Body
Diaphragm
Cover Plate
Assembly
Closure Sleeve Test Cock with O-ring
Closure Sleeve
Sleeve O-Ring
E-clip / Closure Pin
Check Disc
Sleeve O-ring and Gasket
Check Module O-ring
First Check Module
Relief Valve
Second Check Module
Troubleshooting
PROBLEM
CAUSE
SOLUTION
Relief valve discharges water while system is not flowing
Check #1 is fouled
Remove and clean check #1
Relief valve does not properly close
Service relief valve
Municipal water pressure is fluctuating
Install check valve upstream of backflow assembly
Relief valve does not shut off properly
Fouled relief valve seat
Service relief valve
Incorrectly Installed diaphragm
Remove diaphragm and correctly install
Damaged rubber surface on piston
Replace with new piston
Damaged or plugged pressure hose
Repair or replace hose
