Watts 995 Series, Installation, Maintenance & Repair

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4
Servicing the Relief Valve
1 ⁄
2
" - 2" (15 - 50mm)
1. Remove the relief valve cover nut by turning the nut counter-
clockwise
2. Remove the relief valve cover, stem/diaphragm assembly,
and relief valve spring.
3. Inspect the relief valve diaphragm for wear and replace as
needed.
4. The relief valve seat is located inside of the body and can be
removed, if necessary, for cleaning/inspection. The seat is
pressed into the body cavity and can be removed by insert-
ing a finger in the center of the seat and pulling outwards.
Inspect seat for nicks and replace as needed.
5. Inspect the disc rubber and clean or replace if required. The
disc can be removed by screwing the white washer counter-
clockwise.
6. To reassemble the relief valve, press the seat firmly into place
in the body, snap the spring onto the relief valve stem, cen-
ter the spring on the seat, and insert the cover and stem/
diaphragm assembly as a unit, into the body bore. The
locating pin in the relief valve cover should be aligned with
the corresponding locating notch in the top of the relief valve
body.
7. Install relief valve cover nut and tighten.
Cover
Cover O-ring
1st Check
Assembly
Test Cock No. 1
Test Cock No. 2
Cover Bolt (2)
Test Cock No. 3
Test Cock No. 4
2nd Check
Assembly
O-ring
Spring
Relief Valve Seat
Seat O-ring
Relief Valve Stem/
Diaphragm Assembly
Sensing Hose
Cover
O-ring
Relief Valve Cover Nut
For repair kits and parts, refer to our Backflow
Prevention Products Repair Kits & Service Parts
price list PL-RP-BPD found on
watts.com.