Gas Furnace Sediment Trap

The sediment trap shall be either a tee fitting with a capped nipple in the bottom opening of the run of the tee or other device approved as an effective sediment trap this means that all gas furnaces water heaters boilers unit heaters and gas packs are required by code to have a sediment trap in the gas line ahead of the equipment.

Gas furnace sediment trap.

Sediment trap cpc 1212 8 a sediment traps is required at each water heater boiler and furnace downstream of the appliance shut off valve and as close to inlet of the equipment as practical. It s called a sediment trap. Sediment traps sometimes mistakenly referred to as drip legs are designed to catch sediment in natural gas before it enters into the water heater or furnace gas valve. Most water heaters do not have a sediment trap in them.

The furnace permit is not available on line if you are. Different areas have different contaminants in the gas and the traps help catch these. The photo below shows eighteen years of sediment accumulation at the first sediment trap at my own house which is located on the main gas line just before the pressure. Sediment traps are intentionally installed to help prevent sediment in the gas piping from getting into the gas valve or burner area of an appliance and fouling things up.

Sediment trap dirt pocket or drip leg at the appliance connection point there usually is a sediment trap or dirt pocket sometimes called a drip leg that includes a nipple and a cap. Gas piping installed underground shall be a minimum of 12 in depth 18 where external damage could. This pipe extension usually is at least 3 inches long and is intended to catch any water or foreign material that may be in the gas before the material gets into.