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Instructions for Installation (cont'd)
Gas Piping (cont'd)
AWARNING
]
Connecting the gas piping to the gas control valve of'the
The appliance and_ction
must be leak 11
water heater can be accomplished by either of the two meth-
tested before placing the appliance
in operation.
]
ods shown.
AWARNING
GAS PIPING WITH
FLEXIBLE CONNECTOR
The appliance
and its individual
shutoff
valve
must be disconnected from the gas supply piping
["]GAS
SUPPLY
PIPING
system during any pressure testing
of the gas sys-
tem at test pressures in excess of 1/2 pound per
square inch (3.SkPa).
MANUAL
SHUTOFF
The appliance must be isolated from the gas sup-
VALVE
ply piping system by closing its individual manual
shutoff valve during any pressure testing of the
_'_
FLEXIBLE GASCONNECTOR
gas supply piping system at test pressures equal
or less than 1/2 pound per square inch (3.SkPa).
LABELEDwITH
ANsIASsTANDARDsCOMPLYING
GROUND JOINT
LOOP
AWARNING
]
UNION (OPTIONAL)
Use pipe joint common
tape marked as [
| being resistant to the action of petroleum [Propane[
[ (LP')]gases"
[
DR,P LEG
coGNATRS
O1
(SEDIMENT
VALVE
3" MIN.
TRAP)
SEDIMENT TRAP
_
ICAP
A sediment trap shall be installed as close to the inlet of the
water heater as practical at the time of water heater installa-
tion. The sediment trap shall be either a tee fitting with a
capped nipple in the bottom outlet or other device recognized
GAS PIPING WITH ALL BLACK IRON PIPE TO
as an effective sediment trap. Ifa tee fitting is used, it shall be
GAS CONTROL
installed in conformance with one of the methods ofinstalla-
GASSUPPLY P IPING
tion shown.
MANUAL
SHUTOFF
&WARNING
VALVE
Contaminant's
in the gas lines may cause improper
operation
of the gas control valve that may result
in fire or explosion.
Before attaching the gas line I
I
be sure that all 9as pipe is clean on the inside. To I
[I
GROUND JOINT
trap any dirt or torelgn material in the gas supply
UNION
line, a drip leg (sometimes called a sediment trap)
must be incorporated
in the piping. The orip leg
must be readily accessible. Install in accordance
BLACKPIPE_ _,,
I=lJ
GAS
l(_ :-_li_ CONTROL
with
the "Gas Piping" section. Refer to the latest
_
VALVE
edition of the National Fuel Gas Code, ANSI Z223.1,
_J_
DRIPLEG
also referred to as NFPA 54.
EDIMENT
3" MIN.
i
TRAP)
cAP
28
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