1. Detach the activation module, if installed, from the flood sensor
then remove the sensor from the relief valve.
2. Remove the four bolts that hold the relief valve cover in place.
3. Remove the cover. The stainless steel adapter (or piston) with
O-ring attached is also removed with the cover.
4. Pull out the relief valve assembly.
5. Clean the relief valve seat and disc without disassembling the
relief valve assembly. If the relief valve diaphragm, the disc, or
both need replacement, disassemble the relief valve module. No
special tools are required.
Reassembling the Relief Valve
Much care is required to put the relief valve assembly back together. Follow the instructions closely to prevent any damage to the stem.
CAUTION
!
If the relief valve cover does not press against the body, the assembly is crooked. Tightening the bolts in this instance causes the stem to
bend. Do not force the cover into place; misalignment causes damage.
Figure 1
Have a screwdriver handy to reassemble the
relief valve assembly.
Figure 2
Depress the assembly, carefully guiding it
against the 2 pound spring load. When
properly aligned, the piston is in the cylinder
bore. Insert the screwdriver along the right
channel wall, positioning the screwdriver tip
to the left of the relief valve O-rings to hold
the assembly in place.
Figure 3
Let go of the screwdriver and use both
hands to reattach the cover. Insert two bolts
180 degrees apart and fasten to hold the
cover in place. Insert the two remaining
bolts and fasten by alternating one to the
other until the cover is secure. Remove
the screwdriver. Reattach the flood sensor
to the relief valve and mount the activation
module to the sensor.
Disc Assembly
Piston
O-ring
Relief Valve
Assembly
RV O-Ring
Stem
Seat
Body
Cover
Diaphragm
Piston
6
Cover
Seat
O-ring
3
⁄
4
" – 1"
Disc Assembly
(2) Piston
O-rings
Relief Valve
Assembly
(2) RV O-Rings
Stem
Seat
Diaphragm
Piston
Seat
O-ring
1
1
⁄
4
" – 2"
Servicing the Relief Valve
NOTICE
The spring tension in the relief valve assembly is contained in the
design of the relief valve; therefore, the relief can be removed in a
one-piece spool-type assembly.
