New combi (poor gas supply)

Corgigrouch GTi · 26 Aug 2017

Motman said:
You're right, we don't know, so until we do we can only guess hence the question mark at the end of my comment.

I doubt that we will find out, I guess that the OP was thinking that if there was a 15mm inlet, then 15mm would be good for the full length of the pipe but we are only permitted a pressure drop of 1mB between the meter and the appliance..

bernardgreen · 26 Aug 2017

Dan Robinson said:
It's you blithering on about combi efficiencies. Put a socket in it FFS. It's pathetic.

The performamce of some boilers is pathetic when compared to the "efficiency" values used in the marketing of boilers to the general public.

Dan Robinson · 26 Aug 2017

Irrelevant

Corgigrouch GTi · 26 Aug 2017

bernardgreen said:
The performamce of some boilers is pathetic when compared to the "efficiency" values used in the marketing of boilers to the general public.

Well the OP wasn't interested in efficiency, he'd have fitted a cow pat if he thought that he could fit a 15mm gas supply to it..

Gasop · 26 Aug 2017

100 feet 15mm plus fittings could probably run a Bunsen burner ok!

Doggit · 26 Aug 2017

Dan, what would the pressure drop over 30M be for a 22mm gas pipe. I've got a 28Kw Ariston that's running in 22mm over 16M, and works fine. If the OP wants a decent setup, he's going to have to bite the bullet somewhere.

Dan Robinson · 26 Aug 2017

Depends on bends and whatnot. But "working fine" is not the same as working safely, especially with other gas appliances connected.

Doggit · 26 Aug 2017

Point taken, but in my case, there's only a gas hob as well as the boiler in the place, so the boiler pretty much gets as much as it wants. But you;re right in terms of what else the OP has.

customgas · 26 Aug 2017

Doggit said:
what would the pressure drop over 30M be for a 22mm gas pipe. I've got a 28Kw Ariston

Circa 1.3 mb pressure loss @ 30kw.

Dan Robinson · 26 Aug 2017

To give you an idea... The last flat SWMBO and I rented had a 28kw Turbomax and a freestanding cooker. Honourable MIL was staying with us and was cooking on a gas oven for the first time (they don't have them in the motherland). She went for a shower.

I came home from work and had a bit of a scare.

Not MIL in the shower, but the stench of gas as the oven has gone out when the boiler fired. Due to the cretinous landlord not having a safety check done, the safety device wasn't working on the oven so just pizzed had into the kitchen when MIL turned the shower off.

bernardgreen · 27 Aug 2017

I said:
The performamce of some boilers is pathetic when compared to the "efficiency" values used in the marketing of boilers to the general public.

The reply :- Dan Robinson said:
Irrelevant

The true efficiency may be irrelevant to the installer who doesn't have to pay the gas bills for the life time of the new boiler.

Firebrand said:
Well the OP wasn't interested in efficiency, he'd have fitted a cow pat if he thought that he could fit a 15mm gas supply to it..

How do you know he isn't interested in efficiency ( true efficiency and not the market hyped efficiency ratings )

Dan Robinson said:
Due to the cretinous landlord not having a safety check done, the safety device wasn't working on the oven so just pizzed had into the kitchen when MIL turned the shower off.

As a GasSafe Registered person you could have carried out a gas safety check. It was you and your family at risk, not the landlord. Or was this before you registed as GasSafe ?.

dilalio · 27 Aug 2017

Doggit said:
Dan, what would the pressure drop over 30M be for a 22mm gas pipe. I've got a 28Kw Ariston that's running in 22mm over 16M, and works fine. If the OP wants a decent setup, he's going to have to bite the bullet somewhere.

We've done installs before where supply pipe size looked borderline (having warned customer that a new run 'may be' required at £x's), then upon commissioning, several working pressure tests carried out because the results where just inside permitted levels - just to be sure.

Dan Robinson · 27 Aug 2017

bernardgreen said:
The true efficiency may be irrelevant to the installer who doesn't have to pay the gas bills for the life time of the new boiler

bernardgreen said:
How do you know he isn't interested in efficiency ( true efficiency and not the market hyped efficiency ratings

It's irrelevant because this is a thread about pipe size. Why you have to stick your unqualified pompous oar in to bang the drum for your own blinkered views I don't know.

bernardgreen said:
As a GasSafe Registered person you could have carried out a gas safety check.

I subsequently did. Then bought a house. Oh, and it was CORGI then brainiac.

AGAS · 27 Aug 2017

customgas said:
Circa 1.3 mb pressure loss @ 30kw.

might need another go at that one

AGAS · 27 Aug 2017

bernardgreen said:
The true efficiency may be irrelevant to the installer who doesn't have to pay the gas bills for the life time of the new boiler.

How do you know he isn't interested in efficiency ( true efficiency and not the market hyped efficiency ratings )

As a GasSafe Registered person you could have carried out a gas safety check. It was you and your family at risk, not the landlord. Or was this before you registed as GasSafe ?.

totally irreverent don't you think bernard , whats up has dan hurt your feelings

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New combi (poor gas supply)

Doggit

Doggit

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