Watts 919 Series, Manual, Page: 5 / 8

5
Servicing First & Second Check Valves
1
⁄
4
" – 2" (8 – 50mm)
NOTES : 1. No special tools are required to service the Series 919
1 ⁄
4
" - 2" (8 – 50).
2. Before servicing, make sure the water is turned off or
shutoff valves are closed.
1. Close shutoff valves up and downstream of the valve.
2. Using an appropriate sized wrench, loosen the check valve
cover. Unscrew the check valve cover and lift it off.
3. Remove the spring.
4. Lift out the disc holder assembly from the body of the valve.
5. To reverse the seat disc, unscrew the disc screw and disassemble
the disc washer and disc rubber from the disc holder assembly.
Reverse the disc rubber so the opposite face is showing.
6. Assemble the disc screw through the disc washer and
disc rubber, and screw it into the disc holder.
7. To replace the seat module, pull the seat module
out of the body by gripping at the reinforcement
ring. Replace the seat module with the new seat
by placing it into the body seat bore.
NOTE: When you tighten the cover in Step 12, the
cover will engage the seat module properly.
8. Insert the disc holder assembly back into the seat module.
9. Replace the spring ensuring that it seats properly on the
disc holder.
WA R N I N G
The first check valve has a heavy weight spring. The second check
valve has a lighter weight spring. When reassembling the check
valves, make sure you install the correct spring into the correct
check valve.
10. Place the cover onto the spring with the internal guide on the
cover positioned inside the end coil.
11. Screw the cover onto the valve body.
12. Tighten the cover using the appropriate sized wrench.
13. Service the second check valve using Steps 2 through 12.
14. Slowly open shutoff valves.
ORDER CODE KIT NO. SIZE
in. mm
1st Check Kits:
0888110 RK 919 CK1 1 ⁄
4
– 1 ⁄
2
8 – 15
0888111 RK 919 CK1 3 ⁄
4
20
0888112 RK 919 CK1 1 25
0888113 RK 919 CK1 1 1 ⁄
4
– 1 1 ⁄
2
32 – 40
0888114 RK 919 CK1 2 50
Kit consists of: Check Assembly, Spring and Cover O-ring
2nd Check Kits:
0888115 RK 919 CK2
1
⁄
4
–
1
⁄
2
8 – 15
0888116 RK 919 CK2
3
⁄
4
20
0888117 RK 919 CK2 1 25
0888118 RK 919 CK2 1
1
⁄
4
– 1
1
⁄
2
32 – 40
0888119 RK 919 CK2 2 50
Kit consists of: Check Assembly, Spring and Cover O-ring
1st or 2nd Check Rubber Parts Kits:
0888120 RK 919 RC4 1 ⁄
4
– 1 ⁄
2
8 – 15
0888121 RK 919 RC4 3 ⁄
4
20
0888122 RK 919 RC4 1 25
0888123 RK 919 RC4 1 1 ⁄
4
–1 1 ⁄
2
32 – 40
0888124 RK 919 RC4 2 50
Kit consists of: Disc, Seat O-ring and Cover O-ring
ORDER CODE KIT NO. SIZE
in. mm
Check Seat Kits:
0888125 RK 919 S 1 ⁄
4
– 1 ⁄
2
8 – 15
0888126 RK 919 S 3 ⁄
4
20
0888127 RK 919 S 1 25
0888128 RK 919 S 1 1 ⁄
4
– 1 1 ⁄
2
32 – 40
0888129 RK 919 S 2 50
Kit consists of: Seat, Seat O-ring and Cover O-ring
Complete Valve Rubber Parts Kits:
0888140 RK 919 RT
1
⁄
4
–
1
⁄
2
8 – 15
0888141 RK 919 RT
3
⁄
4
20
0888142 RK 919 RT 1 25
0888143 RK 919 RT 1
1
⁄
4
– 1
1
⁄
2
32 – 40
0888144 RK 919 RT 2 50
Kit consists of: 2 Check Discs, 2 Check Seat O-rings, 1 RV Disc
Check Cover Kits:
0888145 RK 919 C 1 ⁄
4
– 1 ⁄
2
8 – 15
0888146 RK 919 C 3 ⁄
4
20
0888147 RK 919 C 1 25
0888148 RK 919 C 1 1 ⁄
4
– 1 1 ⁄
2
32 – 40
0888149 RK 919 C 2 50
Kit consists of: Cover and Cover O-ring
Replacement Parts
1
⁄
4
" – 2" (8 – 50mm)
When ordering, specify Ordering Code Number, Kit Number and Valve Size.
Check Disc Washer
Check Disc Screw
Check Seat
Check Seat
O-ring
Cover
Cover O-ring
Check Spring
Check Disc Rubber
Check Disc Holder
Check Assembly