A.O. Smith G6-PVT4050NV Installation Instructions And Use & Care Manual page 18

INSTALLATION
Turn the manual gas valve for
3
the water heater's supply line
OFF.
Open a hot water faucet and
4
let the hot water run until it
is cool.
Figure 31 - Let the hot water run until it is cool.
WARNING! Be sure the water
runs cool before draining the tank to
reduce the risk of scalding.
Connect a garden hose to the
5
drain valve and place the
other end of the hose in a
drain, outside, or in buckets (sediment
in the bottom of the tank may clog
the valve and prevent it from draining.
If you cannot get the tank to drain,
contact a qualified person).
6 Turn the cold water supply
valve OFF.
Figure 32 - Cold water supply in OFF position.
Open the drain valve on the
7
water heater.
18 • Residential Gas Water Heater Use and Care Guide
Figure 33 - Draining the old water heater.
Also open a hot water faucet
8
to help the water in the tank
drain faster.
When the tank is empty,
9
disconnect the Temperature
& Pressure (T&P) Relief Valve
discharge pipe. You may be able to
reuse the discharge pipe, but do not
reuse the old T&P Relief Valve. A new
T&P Relief Valve comes with your new
water heater.
Figure 34 - Removing the T&P Relief Valve
discharge pipe.
Allow the vent pipe and draft
10
hood to cool. Once cooled,
disconnect the vent pipe
from the draft hood. You may need to
support the vent pipe until the new
water heater is in place.
Figure 35 - Disconnect the vent pipe from the
draft hood.
Disconnect the water pipes.
11
Many water pipes are
connected by a threaded
union which can be disconnected with
wrenches. If you must cut the water
pipes, cut the pipes close to the water
heater's inlet and outlet connections,
leaving the water pipes as long as
possible. If necessary, you can make
them shorter later when you install
the new water heater.
Confirm the manual gas valve
12
for the water heater's supply
line is turned OFF. Disconnect
the gas line from the water heater's
gas control valve and cap it.
Remove the old water heater.
13
Use an appliance dolly or
hand truck to move the water
heater.
WARNING! Use two or more
people to remove or install a water
heater. Failure to do so can result in
back or other injury.