Installing the New Water Heater (cont’d)
WARNING
The appliance and its individual shutoff valve must be disconnected from the gas supply piping system during any pressure testing of that system at test pressures in excess of 1/2 pound per square inch (3.5kPa).
The appliance must be isolated from the gas supply pip- ing system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping sys- tem at test pressures equal to or less than 1/2 pound per square inch (3.5kPa).
WARNING
The appliance and its gas connection must be leak tested before placing the appliance in operation.
WARNING
Use pipe joint compound or teflon tape marked as being resis- tant to the action of petroleum [Propane (L.P.)] gases.
GAS PIPING WITH
FLEXIBLE CONNECTOR
GAS SUPPLY PIPING
MANUAL
SHUTOFF
VALVE
FLEXIBLE GAS CONNECTOR
LABELED AS COMPLYING
WITH ANSI STANDARDS
GROUND JOINT
UNION (OPTIONAL)
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| DRIP LEG |
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| GAS | |
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| (SEDIMENT | |
3″ MIN. |
| TRAP) | CONTROL | |
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| CAP | VALVE |
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Connecting the gas piping to the gas control valve of the water heater can be accomplished by either of the two methods shown.
SEDIMENT TRAP
A sediment trap shall be installed as close to the inlet of the water heater as practical at the time or water heater instal- lation. The sediment trap shall be either a tee fitting with a capped nipple in the bottom outlet or other device recog- nized as an effective sediment trap. If a tee fitting is used, it shall be installed in conformance with one of the methods of installation shown.
WARNING
Contaminants in the gas lines may cause improper oper- ation of the gas control valve that may result in fire or explosion. Before attaching the gas line be sure that all gas pipe is clean on the inside. To trap any dirt or foreign material in the gas supply line, a drip leg (sometimes called a sediment trap) must be incorporated in the pip- ing. The drip leg must be readily accessible. Install in accordance with the “Gas Piping” section. Refer to the current edition of the National Fuel Gas Code, ANSI Z223.1, also referred to as NFPA 54.
GAS PIPING WITH ALL BLACK IRON PIPE TO
GAS CONTROL
GAS SUPPLY PIPING
MANUAL
SHUTOFF
VALVE
GROUND JOINT
UNION
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| BLACK PIPE |
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| DRIP LEG | GAS |
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| 3″ MIN. |
| (SEDIMENT | ||
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| CONTROL | |||
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| TRAP) | VALVE |
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| CAP |
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