12-06-2007 0158 PM 3.
Why do you need a drip leg on a gas line. 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. What do drip legs do and why do you need them in your steam system. And change your terminology.
Cutting oil metal filings etc. From entering the gas valve. Drip legs are only needed if the gas is wet.
In this HVAC tutorial video I demonstrate the correct way and the incorrect way to install a drip leg and regulator on a re. Stoves dryers gas logs and fire places generally require someone present to monitor the start up. It is commonly known as a sediment trap.
Drip legs are required to be installed in a manner that meets or exceeds fuel piping codes and manufacture requirements for appliances and devices. That would be any appliance such as a furnace boiler or water heater that is capable of turning on by itself. Drip legs are only needed if the gas is wet.
And the gas cock is always first thats just common sense to be able to shut the equipment down to service it. 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. Not a drip leg.
Logic would say that either they ALL need it or none would after all it is the same gas. Unfortunately the lack of or incorrect installation of a drip leg or sediment trap is another common item found. Drip legs are intended for unoccupied gas appliances.