27829-5-0115
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Check all local codes for requirements, especially for the size and
type of gas supply line required.
Recommended Gas Pipe diameter
Pipe Length
Schedule 40 Pipe
Inside Diameter
Tubing, Type L
Outside Diameter
Nat.
L.P.
Nat.
L.P.
0-10 feet
0-3 meters
1/2”
12.7mm
3/8”
9.5mm
1/2”
12.7mm
3/8”
9.5mm
10-40 feet
4-12 meters
1/2”
12.7mm
1/2”
12.7mm
5/8”
15.9mm
1/2”
12.7mm
40-100 feet
13-30 meters
1/2”
12.7mm
1/2”
12.7mm
3/4”
19mm
1/2”
12.7mm
100-150 feet
31-46 meters
3/4”
19mm
1/2”
12.7mm
7/8”
22.2mm
3/4”
19mm
Notice
:
never use plastic pipe. Check to confirm whether your local
codes allow copper tubing or galvanized.
Notice
:
Since some municipalities have additional local codes, it
is always best to consult your local authority and installation code.
Installing a New Main Gas cock
Each appliance should have its own manual gas cock.
A manual main gas cock should be located in the vicinity of
the unit. Where none exists, or where its size or location is not
adequate, contact your local authorized installer for installation or
relocation.
Compounds used on threaded joints of gas piping shall be resistant
to the action of liquefied petroleum gases. the gas lines must be
checked for leaks by the installer. Testing for leaks on all exposed
connections should be done with leak detection test solution. After
testing is complete, all solution should be cleaned off. On unexposed
connections, a pressure test should be made.
Never use an exposed flame to check for leaks. fireplace must
be disconnected from piping at inlet of control valve and pipe
capped or plugged for pressure test.
Never use an exposed flame to check for leaks. Appliance must
be disconnected from piping at inlet of control valve and pipe
capped or plugged for pressure test. Never pressure test with
appliance connected; control valve will sustain damage!
A gas valve and ground joint union should be installed in the gas
line upstream of the gas control to aid in servicing. It is required by
the National Fuel Gas Code that a drip line be installed near the gas
inlet. This should consist of a vertical length of pipe tee connected
into the gas line that is capped on the bottom in which condensation
and foreign particles may collect.
GAS SUPPLY PLUMBING
MANUAL
SHUT-OFF VALVE
GAS SUPPLY
INLET
1/8 NPT PLUGGED
HOLE FOR
TEST GAGE
3”
MINIMUM
TO CONTROL
VALVE
figure 14
figure 15
The use of the following gas connectors is recommended:
— ANSI Z21.24 Appliance Connectors of Corrugated Metal Tubing
and Fittings
— ANSI Z21.45 Assembled Flexible Appliance Connectors of
Other Than All-Metal Construction
The above connectors may be used if acceptable by the authority
having jurisdiction. The state of Massachusetts requires that a
flexible appliance connector cannot exceed three feet in length.
Pressure Testing of the Gas Supply System
1. To check the inlet pressure to the gas valve, a 1/8" (3.175mm)
N.P.T. plugged tapping, accessible for test gauge connection,
must be placed immediately upstream of the gas supply
connection to the appliance.
2. 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 psig (3.5 kPa).
3. The appliance must be isolated from the gas supply piping
system by closing its individual manual shutoff valve during
any pressure testing of the gas supply piping system at test
pressures equal to or less than 1/2 psig (3.5 kPa).
Attention!
If one of the procedures results in pressures in excess
of 1/2 psig (14" w.c.) (3.5 kPa) on the appliance gas valve, it will
result in a hazardous condition.
GAS SuPPLy
