UPPER INLET CHECK VALVE
Loosen the flare nuts of tubing (1) and remove the tubing.
With an adjustable wrench, remove the upper inlet check valve body (2).
Refer to the inset illustration for the inlet check valve.. Carefully remove the O-ring (3) from the groove in
the check valve body (2). Remove check valve assembly (4).
Remove the flat O-ring (5) from inside the check valve cavity of the pump body (6).
Examine all rubber parts for contamination, nicks, cuts and abrasions. If necessary, replace all components
with repair kit components. Refer to Appendix C RPSTL for kit part numbers.
Complete the installation of this check valve before proceeding with the inspection of the next
Press O-ring (3) with fingers into the groove of the check valve body (2). Insert the O-ring (5) into the check
valve cavity of the pump body (6). Position check valve (4) in the check valve body (2). Thread the check
valve body (2) into the pump body (6), tighten and orient assembly as illustrated..
Reassemble the flare fittings of tubing (1) and tighten.
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