A steam trap is used to eliminate the condensate when steam loses its heat energy and starts to condensate.

What is the purpose of a drip leg in gas piping. How long should a gas drip leg be. The outlet of the meter is one such location. Drip legs technically call just a drip are installed to collect condensation in a gas piping system so they are installed in a low point to prevent condensation from running back into the gas meter.

They are located in low areas of a gas line. In front of normally closed valves to avoid building up condensate that may damage the system when accelerated. Sediment traps are usually installed very close to the water heater or furnace valve.

That lowest point would likely not be the appliance although it could be if the appliance was in a basement in which case you could see a drip leg at the appliance. A drip leg can be installed anywhere at the low point in the piping system if there is moisture in the gas to allow for the removal of the condensation. Beside above is a drip leg required.

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. In front of control valves to avoid damaging the equipment. Installed at different locations A drip leg can be installed anywhere at the low point in the piping system if there is moisture in the gas to allow for the removal of the condensation.

In front of pressure reducing valves to avoid damaging the equipment. Code requires a drip leg to prevent any foreign particles ie. At the bottom of vertical lines.

Cutting oil metal filings etc. The outlet of the meter is one such location. This could be things such as metal shavings from pipe cutting and threading during gas line installation at the home or dirt that may have gotten in to the line from utility crews installing gas mains underground.