Water supply connections
Plumbing should be carried out by a qualified plumber in accordance with local
codes. Use approved plumbing materials and tools only.
Install a Check Valve between the water heater and the water shutoff valve. (See
illustration below).
To conserve energy and to prevent freezing, insulate both cold and hot water
supply lines. DO NOT cover the drain valves.
Install a shutoff valve near the inlet of the water heater for service and draining
purposes. Before connecting the water supply pipe to the water heater, open the
shutoff valve ·and clean out sand, debris, air, caulking material, etc. inside the
pipe. Connect to the water inlet, then check water flow. Close the shutoff valve
and clean the water filter.
If a water heater is installed in a closed water supply system, such as one having
a backflow preventer in the cold water supply line, means shall be provided to
control thermal expansion. Contact the water supplier or local plumbing inspector
on how to control this situation.
CAUTION: This water heater must only be used with the following water
supply system conditions:
● With clean, potable water free of corrosive chemicals, sand, dirt, or other
contaminates.
● With inlet water temperatures above 32°F, but not to exceed 90°F.
● Free of lime and scale deposits.
● DO NOT reverse the hot and cold water connections. The water heater
will not operate.
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