Click here to Find a Contractor in your area.
Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit

Valve ID.

STEVEusaPASTEVEusaPA Member Posts: 4,365
I saw this on a new customer's gas line. The gas line is not connected to anything-all appliances are oil and electric, and no gas meter. The gas line runs out of the house and into the ground toward the street. No meter or shut off valves.
It's a Honeywell valve, has low voltage wires on it that go no where, and it has what appears to be it's own bypass line. All branches have closed shut off valves that go no where.
No evidence of gas fireplace, and pipe dead ends 20' away in the basement.
Looks to be some sort of gas shut off.
Just curious.



  • unclejohnunclejohn Member Posts: 1,617
    Some type of bleed off valve. Flow would be from right to left in picture. Solenoid would open and allow gas from right to lift bellows and valve would open When shut off the gas would bleed off at burner and spring would close bellows.
  • retiredguyretiredguy Member Posts: 270
    Most every school building in the city of Pittsburgh, Pa has a manual reset master shutoff valve on the gas line that shuts off all the natural gas supply to the whole building in the event of a fire or other disaster. This valve could have been used as the same thing although I never saw one used in a residence.
  • STEVEusaPASTEVEusaPA Member Posts: 4,365
    Thanks guys for some insight. What do you think the low voltage wires were doing? Wired to a control on a boiler?
  • retiredguyretiredguy Member Posts: 270
    I would guess that the wires went to a fire alarm system or to a company responsible for the distribution of the gas.

    I still remember the mandatory control systems that were installed on the boiler systems in schools and some buildings east of Harrisburg, Pa. These control systems were installed so that the gas supplier in some cases, when gas supplies were low, could shut off the gas supply forcing those customers to switch to an alternative heat source. Some of these systems were controlled by the customer and in some cases the gas supplier controlled them. Since most larger systems had dual fuel burners, usually nat gas and fuel oil, switching to fuel oil or an alternative heat source was easy. The only problem our customers encountered was that when the gas supply was shut off the alternative fuel for the pilot was for propane that in most cases was a manual event, but that is a story for another day. The burners we sold were mostly Power Flame C's
  • mattmia2mattmia2 Member Posts: 1,741
    edited September 11
    I have seen lots of chemistry labs from the 60's or so that had a key switch that turned the gas to the whole room on or off, I suspect a similar configuration for those.

    Maybe that explains what was going on at Clawson middle school. The building was built in the 20's as the high school. It had what looked like oil fill pipes but given the prices of oil vs gas in the area in the 80's they coudln't possibly have been heating with oil, right? Maybe it was dual fuel. The old part was 2 pipe steam. The new pipe was probably hot water.
Sign In or Register to comment.


It looks like you're new here. If you want to get involved, click one of these buttons!