Operating Pressure at meter

[Nat]

I want to hear what stuartmac has to say about this. Legend!

 

[Dannypipe]

My guess is that stuartmac has run for the hills. I hope he did, he was baking my head.

 

[Gray0689]

My guess is that stuartmac has run for the hills. I hope he did, he was baking my head.

He was being an idiot

 

[tamz]

what i would like to know though if gas supplier can not guarantee you 21mbar at meter what chance have we of fitting appliances safely?

Appliances are built to work safely within a tolerance hence when something is more than a 1mb drop it is only ncs.

Think this one through.
The gas supplier only needs to guarantee you 12mb at the inlet (it will never happen) but the usual minimum is 19mb.
If the meter is near capacity (6m³/hr) then there can be a 4mb absobtion across the meter, 1mb drop on the pipework. 1½mb across the gas valve so at 19 supply your boiler is getting 13½mb
Do the math at 12mb supply

About 6 month ago i did a boiler swap, worcs 30si fitted under the stairs, 2m from the meter.
Fired it up and was tidying the place up, heating bouncing, had run the hw but not checked flow rates but it seemed fine. Filling out the paperwork and doing the checks, 5mb at the boiler 6 at the meter
Rung SGN and turned out it was water in the service but the point is, it was working fine.

Zpgv

 

[pobsdad]

Had some bad floods round here a couple of years ago,followed by a spate of gas mains full of water.How water gets into the mains,I have no idea!We had quite a few gas meters with water in them,somehow.

 

[anothergit]

You get water in an old the cast iron and steel system because of corrosion, simple fact is when you get a hole in the gas pipe water will eventually get into the mains, If there is enough water in the ground it will eventually fill the main or service. And as gas is consumed it gets pulled into the meter etc where it will pool and in severe cases make it to the appliances. On old cast main and services there are sometimes syphons to extract the water from.

It can be a real pain in the backside to find the source sometimes.

A broken water main will simpley burst a hole through gas main if they are laid close enough and fill it with water cutting of whole streets, that's a major headache.

 

[tamz]

There have been 2 cases of that in Edinburgh in the past few years. The water even made it up into 2nd floor meters.

 

[Billy Bob Bob]

just read trough this lot pmsl

 

[tamz]

Some beauties lol

 

[GQuigley67]

I have made the genuine mistake before about replying to posts without reading the OP carefully and ended up making a howlin C of myself although not as bad as this i hope