Apollo Reduced Pressure Detector Assembly RPDA24A 8”

Preliminary Steps for 10” & 12” Models

Remove the 1⁄4” nut holding the flow divider (FD) in place.

Rotate the FD 90° and lift up and out of the valve body.

Ensure the FD’s tab is oriented on the same side as the cover of the relief valve body.

Remove the cover coupling by taking off the two bolts and nuts.

Lift off the cover. Ensure the gasket remains on the valve body.

Remove the locknuts on the check seat

Slide the entire check module off the body studs and remove from body.

Test No. 1: Pressure Differential Relief Valve Operation

Open test cock (TC) #4 to establish flow through the RP.

Flush TCs in order without dumping the relief valve

Close test cock #4 and install appropriate adapters in TCs.

If the relief valve still does not open, repair the leaky No. 2 shutoff valve.

Connect the high (left) hose to TC #2.

Connect the low (middle) hose to TC #3.

Fully open the bypass (right) valve.