Blocked gas pipe

[arran197]

I've had a blocked gas valve using Stoke a few times. Not why, but had lots of flaky grey stuff put of 2 sigma valves.

 

[albatross]

Have you been there when it has done it?
You need to be doing working pressures at appliances and meter in fault conditions.
To me it sounds more like an intermittently sticking meter or governor.

 

[Ermintrude]

Had a few like this over last few years. It appears like faulty gov, but if you check meter it's giving 21 and boiler 12. Normally in full chatt on DHW

 

[Dannypipe]

Cheers for all the comments. Customer has had supplier out twice and and so governor must have been checked? Not been there when they've come. I checked working pressure at meter and it was fine but I take your point. I have one of those ended scope cameras. It won't get round the first bend Billy!

Customer asked me if I could fit a filter on it after the meter. I said no. Didn't think it would be allowed. Said he has one on the gas valve to boiler but not on the hob. Seems I was wrong.

Took the meter off when I blasted it last time. It looked clean but I will be more thorough this time. It certainly could be collapses under the patio. That's a very good point.

 

[Dannypipe]

*endescope (on phone).

 

[Killy Bing]

Ahh shame

here you go danny

GAS COCKS & FILTERS

 

[Alex Pelton]

had this before. sounds to me like the meter governor is knackered. works fine for days then all of a sudden the gas stops and restarts intermittently. working pressure fine when tested at both ends. get transco to swap governor. claim low working pressure they'll be pretty quick to come out.

 

[Dannypipe]

Found the problem. Water in the pipe. I blew it through the other way and got easily a pint out if it.

I then rigged the compressor up with the meter end blanked off and high pressure tested it. The patio outside started bubbling when I threw the lever valve. So tomorrow I'll have the apprentice dig it up and go from there. Cheers for the replies everyone.

 

[Killy Bing]

Would offer to help the poor sod but i have an office to fit out

 

[Dannypipe]

So the lad dug it out today, and as fast as he could dig the hole filled up with water!

Got the pump and cleared it out. Found the problem. Leaking joint. I'm amazed it hasn't become a problem sooner. I'll be cutting the leaking joint out tomorrow.

It's a piece of yellow MDPE stuffed into a 28mm compression fitting, with epoxy resin squidged around it.

We need to dig further away from the joint so I can cut the pipe and put a proper union in. Shocked. It was peeing out gas.

The bubbles in picture one are with the compressor attached, not bubbles from the pump. It looked like a jacuzzi.