Rheem MPs Series Installation Instructions Manual page 24

HEAT PUMP AND TANK ASSEMBLY
20. Non Return and Air Bleed Valve Assembly: Connect the non return and
air bleed valve assembly provided to the heat pump hot flow connection,
marked "FROM HEAT PUMP" on the heat pump storage tank.
The non return valve end of the assembly is screwed into the heat pump
storage tank and the end of the hex nipple is exposed.
Ensure the air bleed valve spigot is pointing downwards.
21. Hex Nipple: Fit the ¾" x ½" hex nipple provided to the heat pump cold
return connection, marked "TO HEAT PUMP" on the heat pump storage
tank.
Step 20
connect non return valve and
air bleed valve assembly
24