I have two Trane gas furnaces that were installed in 1989 in my attic (not conditioned space). There are no traps (drip legs?)for the gas line. Is that a safety issue or does the attic location make a gas line trap unnecessary?
I have two Trane gas furnaces that were installed in 1989 in my attic (not conditioned space). There are no traps (drip legs?)for the gas line. Is that a safety issue or does the attic location make a gas line trap unnecessary?
Ahh...drip legs. These are mostly for dust and other debris in gas lines. A true drip leg is used for lines that have an excess of moisture in them and are quite large sections of pipe that can be drained.
As long as all piping to an attic installed appliance is going up, there is really no need for a dust/drip leg, unless local code calls for it.
A drip leg is required where ever condensate can collect. A sediment trap (dirt leg) is required between the shut-off valve and every appliance.
Yes both a sediment trap & drip leg is required at the furnace in the attic.
A drip leg is required where ever condensate can collect. A sediment trap (dirt leg) is required between the shut-off valve and every appliance.
Yes both a sediment trap & drip leg is required at the furnace in the attic.
NFPA 54 a.k.a. National Fuel Gas Code The only version I had at my fingertips this moment is the '99 edition, so this may have been pulled or altered in a newer version. 5.5.7 Sediment Trap - paraphrased- if a trap is not part of the gas appliance, one must be installed as close to the inlet of the appliance at time of installation. Illumianting appliances, ranges, clothes dryers, outdoor grills are not required to have a sediment trap.
If I remember correctly from my gas fitters course, many....many moons ago, the dust leg/drip leg is to be installed for any furnace, boiler or water heater gas line "drop". If the furnace is in an attic and all piping is lower then where the gas line enters the gas valve, the gas line is already one big dust leg.
The reason for all gas piping to slope back to the meter is because the meter itself is a collector for moisture issues.
