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Biasi SG Pro Series
Gas supply piping is to be sized and installed properly in order to provide a supply of gas
sufficient to meet the maximum demand without undue loss of pressure between the meter
and the boiler. Consult with the National Fuel Gas Code ANSI Z223.1 for proper sizing of gas
piping for various lengths and diameters.
Locate a drop pipe adjacent to, but not in front of the boiler. Locate a tee in the drop pipe
at the same elevation as the gas inlet connection to the boiler. Extend the drop line with a
nipple towards the floor and cap to form a sediment trap. Install a shut off valve before the tee
with sediment trap and a union after the tee before the combination gas valve.
When installing the boiler, make sure a pipe compound resistant to the action of liquefied
petroleum is used. Check piping for leaks. Always check leaks with a water and soap solution.
DO NOT USE A FLAME FOR CHECKING GAS LEAKS
The boiler and its individual shut-off valve must be disconnected from the gas supply
piping during any pressure testing of that piping at test pressures in excess of 1/2 psi.
INSTALLATION OF SEDIMENT TRAP AND BURNER SUPPLY LINE
To check for gas
leaks, use a gas
detector or apply a
soap solution to the
joints. DO NOT USE
AN OPEN FLAME!
1" X 1" X 3/4" Tee
9. Gas Line Piping
Direction of flow
Note: Massachusetts state code requires gas
Pipe Cap
Manual Shutoff Valve
Height of shutoff valve above ground level to
conform to local codes, if any.
shutoff to be a tee handled gas cock.
Pressure Gauge Port
(1/8" NPT plugged)
Male Union 3/4" NPT
Burner Gas Train
Page 21
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