Gas ball valves follow the same principles of other ball valves, they are mostly two-piece construction and feature a ¼ turn shut off. That being said, they are not your standard ball valve. Gas ball valves require CSA approval in order to be used in combustible gas applications.
The ratings for gas ball valves are set by CSA. There are different ratings depending on installation location (indoor vs. outdoor) and country (Canada vs. USA).
Special Features:
Pilot Tap
Some gas valves have a pilot tapping in them so a pressure gauge can be installed. This is for testing and/or monitoring the system pressure. Having a gauge right in the valve allows for the most accurate pressure to ensure the system is running at its full potential. The tapping is a standard 1/8” female pipe thread or FPT. Valves with a tapping include a 1/8” male pipe thread (MPT) plug with a tapered brass seat which makes a leak proof seal when tightened with a 3/16” Allen wrench.
Yellow Handle
Most gas valves on the market have a yellow handle to signify that they have gas approvals. This is not an official fact but can be used as a quick visual indication. Always make sure that the correct approvals are on the valve before using it in a gas application.
Understanding what gas ball valve should be used for your application comes down to the ratings and where it will be going - do you need it to have ratings for indoor or outdoor use? When working with gas ball valves always consult a trained professional.
