Rheem RTEH1812 Guide D'installation page 5

EX07200-120 Rev A
For optimum performance, Rheem recommends the use of isolation valves (full flow ball type) on the inlet and outlet pipes and a 40
mesh Y-Strainer on the inlet of the heater.
Clean screen periodically for best performance.
BEFORE ATTEMPTING ANY INSTALLATION, MODIFICATION OR SERVICE OF THIS HEATER, MAKE SURE THE
ELECTRICAL POWER IS DISCONNECTED.
The heater's water INLET and OUTLET are labeled. Install full flow ball valves to
the inlet and outlet pipes and run water through the inlet pipe into a bucket to
purge it of any debris. Close the inlet ball valve.
*Failure to do so may clog the inlet water screen.
Make sure the inlet filter screen is present in the inlet fitting and the inlet and
outlet pipes are correctly aligned with the heater connections to minimize stress
on the heater.
Remove the cover. Connect the pre-assembled inlet and outlet pipes to the heater
(do not overtighten compression fittings) and fully open the inlet and outlet ball
valves. Check the system for water leaks at all plumbing connections. If a leak is
present at the compression fitting, slowly tighten compression nut until it stops –
do not overtighten.
Sample installation diagrams:
Manufacturer's National Service Department | 400 Captain Neville Dr. Waterbury, CT 06705
Eemax® 800-543-6163 | EcoSmart® 877-474-6473 | Rheem® or Richmond® 800-374-8806
Information contained in this document is subject to change without notice.
Note: Thermostatic Tankless Electric Water Heaters and
Thermostatic Tankless Electric Water Heaters with Integrated
Mixing Valve only
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