Specifications

TM012 Rheem Electric Water Heaters Service Instructions REV: B
Date of Issue: 03/06
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Tempering Valve – Rheem Plus Models (Procedure 9)
A quantity of hot water will discharge from the tank during this process.
Personal Protective Equipment should be worn to prevent scalds or burns.
1. Isolate the electricity and water supplies to the water heater.
2. Relieve pressure from the water heater through the T&PR valve or a hot tap.
3. Drain the water heater. Refer to procedure 1 on page 26.
4. Remove the tempering valve and cold pipe access covers.
5. Disconnect cold and warm water pipes from tempering valve and unscrew tempering
valve from heater.
Note: Removal of the cold pipe requires the use of a special tool, part number 890330.
To remove the cold pipe from the tempering valve slide the tool over the pipe and push
up against the quick connect fitting whilst pulling down on the cold pipe.
6. Screw new tempering valve into heater using thread tape on threaded section.
7. Insert cold pipe into tempering valve quick connect fitting and push up to click pipe into
place (no tool required).
8. Reconnect warm water pipe using thread tape on threaded section.
9. Close hot tap or T&PR valve and restore water supply.
10. Check for leaks.
11. Purge air from the system through hot taps.
12. When tank is full restore electrical supply.
After replacing the tempering valve the warm water temperature will need to be checked to
ensure correct operation. Refer to steps 11 to 13 in the Rheem Plus Tempering Valve
Annual Service Procedure on page 32.