Replacing some gas piping with 28mm pipe

[dfish]

Hi
I have had five quotes to replace my boiler which is a 32kw Ariston combi. Only two of them want to replace some of the piping - (only 12m to be replaced with 28mm pipe from the meter and leaving the other 10m at 22mm to the boiler). How do I know who is correct?
the boiler was to be replaced with either a 32kw Vaillant or 30kw Worcester.

Thanks D

 

[ShaunCorbs]

as they may have calculated what the boiler requires m3/h and your existing run couldnt supply that

 

[dfish]

Thanks for your help

 

[lame plumber]

i would choose the ones wanting to upgrade the pipework

 

[turnpin]

Whoever you decide to choose make sure they are Gas safe registered......regards Turnpin😀

 

[dfish]

Thanks that narrows the choice down. One of the guys that said it wasn't necessary thought the 2 that wanted to change the pipe size were just trying to increase the price of the job!!

 

[dfish]

Yes they all are. Thank you.
D

 

[Rickster123]

22m in 22mm? It will need upgrading. Is it a straight direct run or are there bends galore?

 

[dfish]

No bends in the pipe they want to replace but there could be three bends in the remaining pipe.
How do they know that just by replacing some of it will be sufficient.

 

[Masood]

Thanks that narrows the choice down. One of the guys that said it wasn't necessary thought the 2 that wanted to change the pipe size were just trying to increase the price of the job!!

Did this guy base his opinion on pip size calculations carried out, or just threw it out there off the top of his head? 22m pipe run all in 22mm seems too small for a 32KW boiler.

 

[SimonG]

No bends in the pipe they want to replace but there could be three bends in the remaining pipe.
How do they know that just by replacing some of it will be sufficient.

I would say because the blokes are qualified and competent.

 

[dfish]

I don't know. I moved into this property and have had 2 repairs to the boiler in 6 months and its still not right. Thats why I thought I would replace it. If they replace some of he pipe it means I have to re-carpet all the hallway and so I just want to make sure they know what they are talking about. Thanks

 

[dfish]

Ok they are all gas safe registered but giving me different info. I just wanted another unbiased opinion. Thank you.

 

[ShaunCorbs]

Ok they are all gas safe registered but giving me different info. I just wanted another unbiased opinion. Thank you.

as for there calculations 😀 if one produces one go with him

 

[dfish]

Cheers thanks

 

[jtsplumbing]

There are ways that we use to calculate gas runs, using given formulas , just one of the things we need to know, that's why we do training courses & take exams that cost us a lot of money to enable us to safely work with gas,

 

[dfish]

Thanks I appreciate that - despite them all being Gas Safe registered they still give conflicting info but this forum has been very helpful. Thanks you

 

[Dotty]

Thanks I appreciate that - despite them all being Gas Safe registered they still give conflicting info but this forum has been very helpful. Thanks you

We've got a few members in Edinburgh. I'm sure they'd be happy to give you additional quotes if you want.

 

[dfish]

Thanks I will probably just go with the quotes I have and accept one of the quotes that includes replacing the pipe. Thank you

 

[ShaunCorbs]

Thanks I will probably just go with the quotes I have and accept one of the quotes that includes replacing the pipe. Thank you

what boiler they installing?

 

[dfish]

A Vaillant 832 Eco Tech plus

 

[lame plumber]

Oh dear

 

[dfish]

Whats the Oh dear refering to. Should I be worried!

 

[Chalked]

Whats the Oh dear refering to. Should I be worried!

Nothing wrong with that boiler. It's just that 10 guys on here will have 10 differing views on boiler make.
Go with the Vaillant

 

[dfish]

Thanks - yes its all these different views that is confusing but it was the pipe recommendations (or not) that was worrying me. Cheers