Install Instructions




If one is not already installed,
install a manual shuto valve
in the cold water line that
supplies the water heater. Install the
shuto valve near the water heater so
that it is readily accessible. Only use
valves that are compable with
potable water. Use only full-ow ball
or gate valves. Other types of valves
may cause excessive restricon to the
water ow.

Install a Thermostac Mixing
Valve at each point-of-use
(for example, kitchen sink,
bathroom sink, bath, shower).
Consult the valve manufacturer’s
instrucons or a qualied person.






3
For water heaters that are fed
by a solar water heang system (or
any other pre-heang system), always
install a Thermostac Mixing Valve or
other temperature liming device in
the inlet water supply line to limit
water supply inlet temperature to
120°F. Solar water heang systems can
supply water with temperatures
exceeding 170°F and may result in
water heater malfuncon.







Determine the type of water pipes in
your home. Most homes use copper
water pipes, but some use CPVC or
cross-linked polyethylene (PEX). Use
ngs appropriate for the type of pipe
in your home. Do not use iron or PVC
pipe – they are not suitable for potable
water.

Connect the cold water
supply using 3/4 inch
Naonal Pipe Thread “NPT”
to the ng marked “C” (COLD).
For ease of removing the water heater
for service or replacement, connect
the water pipes with a coupling called
a union. We recommend using a
dielectric-type union (available at lo-
cal hardware stores). Dielectric unions
can help prevent corrosion caused by
ny electric currents common in cop-
per water pipes and can help extend
the life of the water heater.
12 • Residenal Electric Water Heater Use and Care Guide
INSTALLATION

Install Thermostac Mixing Valves at each point
where hot water will be used.



If your home has copper water
pipes, you can solder the water
pipe connecons or use compres-
sion ngs which don’t require
soldering. Compression ngs
are easier to install than soldering
pipe. Check with local plumbing
ocials to determine what types
of pipe materials are suitable for
your locaon. Do not use lead-
based solder.
 Do not solder pipes while
they are aached to the water
heater. The water heater’s inlet
and outlet connecons contain
non-metallic parts which could be
damaged. The proper way to con-
nect the water heater to copper
water pipes is as follows:
• Solder a short length of pipe
(about a foot or so) to a threaded
adapter using only 95/5 n-
anmony or equivalent solder.
Aach the threaded adapters to
the water heater’s connecons
(using thread sealant tape or pipe
joint compound). Connect the
home’s water pipes by soldering,
keeping the connecons at the
water heater cool with wet rags.
INSTALLATION