Drip legs are basically for catching condensate and moisture in a gas line.
What is the purpose of a drip leg in gas piping. A sediment trap usually is installed as close to the appliance as possible. The outlet of the meter is one such location. At the bottom of vertical lines.
Code requires a drip leg to prevent any foreign particles ie. How long should a gas drip leg be. 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.
One way to remember the above is that if the flame can be seen illuminating appliances ie gas lights or if the appliance is attended by the person operating the appliance ranges clothes dryers outdoor grills the person operating the appliance should be able to tell if the gas has stopped working then a sediment trap is not 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. 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 the appliance itself.
A drip leg or also commonly called a sediment trap is used on fuel piping to prevent sediment debris and moisture from entering a gas appliance or fuel regulator. Drips legs are used to collect water droplets. Drip legs are required to be installed in a manner that meets or exceeds fuel piping codes and manufacture requirements for appliances and devices.
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. 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. They are located in low areas of a gas line.
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. Sediment traps installed at gas appliances are used to help catch any sediment or debris that may be present in the gas line and prevent it from entering the appliance and possibly damaging it. 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.