Watts 995 Series, Installation, Service, Repair Kits, Maintenance

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RELIEF VALVE SERVICE INSTRUCTIONS
1. Prior to beginning any maintenance work, shut down the water
supply to the unit.
2. The relief valve is an integral part of the lid assembly and may be
serviced when the lid assembly is removed from the body of the
valve.
3. The relief valve may be disconnected from the sensing line hose if
desired to enable easier access to all parts of the assembly.
REPLACING THE SEALING DISC
1. Unscrew the lower guide, (5) from the shaft (3).
2. Replace the sealing disc assembly (4).
3. Screw the lower guide (5) back into the shaft (3). The lower guide
will seal the assembly with pressure against the elastomer in the
sealing disc assembly (4).
Servicing the Relief Valve
COMPLETE DISASSEMBLY OF THE RELIEF VALVE
1. Remove the sealing disc as above.
2. Remove the dust cover (10) from the cover weldment (1).
3. Unload the internal spring by unscrewing the guide, shaft (9) us-
ing a socket wrench.
4. Draw the shaft out through the bottom of the diaphragm.
5. Remove the spring through the top of the cover weldment.
6. Remove guide O-ring (6).
7. Remove O-ring (12) from the guide shaft.
REASSEMBLY
1. Replace all O-rings
2. Reverse disassembly steps above.
Item Part Description Qty.
1. Cover 1
2. Diaphragm/Gasket 1
3. Shaft 1
4. Sealing Disc 1
5. Guide, Lower 1
6. O-ring 1
7. Support Disc 1
8. Disc, Diaphragm Stop 1
9. Guide, Upper 1
10. Cover, Dust 1
11. O-ring, Upper 1
12. Spring 1
Parts Table
(figure 9)
Figure 9
10
9
11
12
6
1
8
7
2
3
4
5