25
Installing the Water Heater
Full Port Gas
Shut-Off Valve
Union
Pressure Relief
Valve*
Shut-Off
Valve
Check Valve
Expansion Tank
Gas Supply
Recirculation Line
* required -
not included
Hot Water
Supply
Cold Water
Supply
Note
The illustration above provides a
typical water piping installation
example and is for reference only.
3.4 Connecting the Water Supply
The water fittings on the water heater are
3
/
4
in.
If the installation site only has
1
/
2
in plumbing
throughout, it is not necessary to upsize the water
lines to
3
/
4
in.
When connecting the water supply, follow these
guidelines:
●
Do not remove the factory installed recirculation
inlet cap unless a return line is connected to this
fitting. Water leakage will occur if this cap is loose
or missing.
●
Use only pipes, fittings, valves, and other
components, such as solder, that are approved for
use in potable water systems.
●
Tighten the water heater connection valves with
care to avoid damage.
●
We recommend using unions and manual shut-
off valves on the cold water inlet and DHW outlet.
●
Strive to make the hot water piping system as
short as possible, to deliver hot water to the
fixtures more quickly.
●
To conserve water and energy, insulate all water
piping—especially the hot water line. Never
cover the drain or pressure relief valve. If the
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 for
information about how to control this situation.
●
After installing the water heater, clean the inlet
water filter that is located inside the cold water
inlet, and then test the water heater for proper
flow and inspect for leaks. Instruct the water
heater owner that the filter must be cleaned
periodically to maintain proper water flow.
