Gas pressure question

[Wormwood]

The only time is if it's out of spec e.g. More than allowed pressure drop

Ok, thanks Shaun - I understand. What do you think of my plan in post 17?

The engineer who carried out the survey should have carried out a pipe sizing exercise to determine if the existing pipe is suitable, he has said it is not and requires upgrading ................. I would suggest you follow his advice

Thanks for that explanation GH77.

The pipe coming out of the meter is 22mm, so it reduces to 15mm somewhere inside the house. It would be really good if I could find out exactly where - maybe it's right next to the boiler (the 15mm disappears into the plaster so I can't tell).

Btw, there's a rust-coloured deposit all over the inlet pipe to the meter. I wonder if it's got inside the pipe as well. Hmm.

Providing the pressure drop is within the regulations then you are ok , if not then it will need to be addressed .....

Ok, thanks Kop.

 

[ShaunCorbs]

I would get no 2 done first and see what you get

 

[Old Account]

Yes we're only allowed max 1.5 mbar drop from the meter to the appliance working

I think rules have changed 1mbar drop max. From meter to appliance 1mbar drop only!

 

[ShaunCorbs]

I think rules have changed 1mbar drop max. From meter to appliance 1mbar drop only!

Still 1.5mbar max

 

[GH77]

Depends where your pressure test point at the boiler is, whether you've got one before the boiler or using the test point on the Gas Valve, picture paints a thousand words

 

[Chalked]

I think this thread should be closed.
There is too much gas related info being given to a diy'er who should just employ a good gsr to install the new boiler and update the supply pipework as needed.

 

[GH77]

He already has, just reassuring him that his GSR is correct, why he's correct and that he's not being ripped off

 

[townfanjon]

He already has, just reassuring him that his GSR is correct, why he's correct and that he's not being ripped off

Agree with chalked , this should have been closed yesterday

 

[Wormwood]

I think this thread should be closed.
There is too much gas related info being given to a diy'er who should just employ a good gsr to install the new boiler and update the supply pipework as needed.

I am NOT a DIYer!!

I've already said several times that I have no intention of doing it myself and that I have and will use a qualified gas installer.

Read posts 16 & 21!

Is that clear enough for you?

I will not say it again.

 

[Wormwood]

I would get no 2 done first and see what you get

Yes, I think you're right. Then no 1 if it's still too low. (My meter really is ancient, spiders crawling out of it, etc, etc).

Btw, I reckon the 22mm-15mm reducer is closer to the boiler than I thought (I had a closer look last night). The 22mm comes out of the meter and goes straight back through the wall horizontally. After 10 inches, it disappears behind the plasterwork inside the lounge.

Here it must either a) turn vertical until it reaches 1st floor joist level - or b) go off in another direction.

Assuming a) is correct, it must turn horizontal again and run through the joists, over the hall, over the downstairs toilet, and into the kitchen, where the boiler is. Then it turns vertical again (so it's now pointing downwards), reduces to 15mm and runs down inside the plaster to the boiler.

All I have to do is find the point where the reducer is - my guess is directly above the boiler at 1st floor joist level.

 

[townfanjon]

Mr Wormwood , you are out of order disagreeing with my thread closed statement , you are clearly "picking everybodys brains" on here , I saw this thread develop and thats why I left it alone . Leave the gas alone !!!!!!

 

[Wormwood]

Mr Wormwood , you are out of order disagreeing with my thread closed statement , you are clearly "picking everybodys brains" on here , I saw this thread develop and thats why I left it alone . Leave the gas alone !!!!!!

What's the point of the forum if people can't come here and ask for advice!

The reason I disagreed with your post 33 is that it agreed with Chalked, who said in post 31 that I should use a GSR. I have already stated countless times that I will not touch the gas myself and will use a GSR!!!

I am trying to establish whether there is an alternative to running 20 feet of 22mm pipe on the outside of the house, across two doors, one window and through one gate. This was the only solution offered by the installer mentioned in post 13.

He was wrong. The solution is to find the 22-15 reducer, which I now know is on the inside of the house. I also know, thanks to the helpful people here (Shaun, Snowhead, GH77 & kop, etc), that I could stick with 15mm if the pressure drop does not exceed regs, or contradict the new boiler's pipe spec.

 

[masons]

He was wrong. The solution is to find the 22-15 reducer, which I now know is on the inside of the house. I also know, thanks to the helpful people here (Shaun, Snowhead, GH77 & kop, etc), that I could stick with 15mm if the pressure drop does not exceed regs, or contradict the new boiler's pipe spec.

really !

 

[jtsplumbing]

Question you say that you have a glow worm Balanced Flue boiler, is this a standard boiler with hot water tank ? and is it being replaced (Upgraded to a combi) ? or are you just having a boiler swap ?

 

[Wormwood]

Question you say that you have a glow worm Balanced Flue boiler, is this a standard boiler with hot water tank ? and is it being replaced (Upgraded to a combi) ? or are you just having a boiler swap ?

Yes, I've got a bog-standard Glow-worm Fuelsaver MkII with HW cylinder & immersion heater in airing cupboard and a small F&E tank in the loft. New boiler will be a straight swap - it won't be a combi (partly because the cylinder, pump, motorised valve & tankstat etc have already been changed for new ones).

 

[Old Account]

What's the point of the forum if people can't come here and ask for advice!

The reason I disagreed with your post 33 is that it agreed with Chalked, who said in post 31 that I should use a GSR. I have already stated countless times that I will not touch the gas myself and will use a GSR!!!

I am trying to establish whether there is an alternative to running 20 feet of 22mm pipe on the outside of the house, across two doors, one window and through one gate. This was the only solution offered by the installer mentioned in post 13.

He was wrong. The solution is to find the 22-15 reducer, which I now know is on the inside of the house. I also know, thanks to the helpful people here (Shaun, Snowhead, GH77 & kop, etc), that I could stick with 15mm if the pressure drop does not exceed regs, or contradict the new boiler's pipe spec.

If you are really going to hire a fully gas qualified engineer then you could ask him directly as he will surely give you then an update on your questions.

 

[Wormwood]

If you are really going to hire a fully gas qualified engineer then you could ask him directly as he will surely give you then an update on your questions.

I have (Friday) and he did. He said the only way to find the existing 22mm pipe run is to lift the floorboards on the 1st floor. Chipboard t&g (nailed down of course, just to make life easy).

 

[kris]

Right wormwood your fine asking advice of course , anything we can help with is no problem but when asking about gas and pressures it does ring alarm bells as so many diyers out there , I know u worked or work on rigs and say u won't touch it but that doesn't prove anything as it's only words , everything your asking about should be spoken with your engineer , if you disagree with an engineers advice about upgrading pipe sizes then I can assure you that it's really common nowadays because of the gas consumption difference between older boilers and new condensers , as for members that are posting picks of test procedures , yes this thread should be closed me thinks , I agree with chalked and John,

 

[Wormwood]

Right wormwood..... if you disagree with an engineers advice about upgrading pipe sizes then I can assure you that it's really common nowadays because of the gas consumption difference between older boilers and new condensers ...

Right kris. I have not disagreed with an engineer's advice about pipe sizes. I have disagreed with first engineer's advice that the only option is to run the pipe on the outside of the house (post 37).

Fact: there are two options - inside and outside.

Inside is the advice given by the engineer on Friday and this is the route he will use. End of.

Btw, If I say I won't touch something - it means I won't touch something. Full stop.

 

[Wormwood]

I have asked admin for this thread to be closed.

 

[GH77]

The picture I posted doesn't tell you how to carry out a procedure, it does clarify that what the gsr said about pressures is correct, was used to reassure that the gsr does know what he's talking about ... the common theme on this thread is people continuously stating " use a gsr" and wormwood saying he will ... but yes now the thread should be closed before it all gets too heated

 

[Wormwood]

.... the common theme on this thread is people continuously stating " use a gsr" and wormwood saying he will...

Exactly, well said GH77.

 

[kris]

No need to get offensive mate , I've been quite polite to yourself, but saying you will or won't touch something doesn't give the go ahead to discuss matters which the forum rules clearly state not to, like I said wormwood were happy to advise but when u start getting into gas pressure testing or similar then it conversations you have with your engineer , I wish u good luck with your project ,

 

[kris]

The picture I posted doesn't tell you how to carry out a procedure, it does clarify that what the gsr said about pressures is correct, was used to reassure that the gsr does know what he's talking about . the common theme on this thread is people continuously stating " use a gsr" and wormwood saying he will . but yes now the thread should be closed before it all gets too heated

Right mate so post 11 doesn't explain anything, I never mentioned your name so don't presume I did thanks

 

[kris]

Please look at the top if this page FLASHING IN RED appearing on the page now and again, we won't give advise related to gas , now we will try give advice even when bridging onto the gas topic but when it starts to get past threshold barrier then we all play by the rules,