
Installation & Operation Manual
8
Gas connections
Connecting gas supply piping
1. Remove the top access panel and refer to FIG. 8-1 to pipe
gas to the water heater.
a. Install ground joint union for servicing, when
required.
b. Install a manual shutoff valve in the gas supply piping
outside water heater jacket when required by local
codes or utility requirements.
c. In Canada – When using manual main shutoff
valves, it must be identified by the installer.
2. Install sediment trap / drip leg.
3. Support piping with hangers, not by the water heater or its
accessories.
DIR #2000589434 00
GAS SUPPLY
UNION
(FIELD SUPPLIED)
SEDIMENT TRAP /
DRIP LEG
MANUAL SHUTOFF VALVE
(FACTORY SUPPLIED)
Figure 8-1
Gas Supply Piping
4. Purge all air from the gas supply piping.
5. Before placing the water heater in operation, check the
water heater and its gas connection for leaks.
a. The appliance must be disconnected from the gas
supply piping system during any pressure testing of
that system at a test pressure in excess of 1/2 PSIG
(3.5 kPa).
b. The appliance and its gas connection must be leak
tested before placing it in operation.
The gas valve and blower will not support
the weight of the piping. Do not attempt
to support the weight of the piping with
the water heater or its accessories. Failure
to comply could result in severe personal
injury, death, or substantial property
damage.
⚠
WARNING
47