gas pipe size help

[stumas]

My existing gas installation to my gas fire, cooker and old boiler which did hot water only is all in 15mm. Im thinking of having installed a new combi boiler. Would this need a 22mm feed to it, or not? Or would the 15mm be sufficient. I'm thinking of having a Bosch 28 junior installed.

 

[AWheating]

you could need 15mm,22mm,28mm,35mm?? it depends on the appliances, the route and restriction of the pipework. So how can somebody on the internet tell you what pipe you need?

this is why you have been told to ask your gas safe engineer.

i normally fit 28mm min as a "rule of thumb"

 

[Ermintrude]

I'd use microbore after this tread!!

 

[stumas]

No need to feel offended. The chaps here are just reinforcing the use of properly qualified gas engineers for this work. If someone comes out and says "yes I will connect this boiler to a 15mm gas pipe" they are probably no good. It is likely that this boiler will require a larger size pipe, which will be required sizing properly, so a Gas Safe Registered engineer should be able to quote you what is required. We can not give you specific advice on this, as we have not seen the job and we cannot give specific gas technical advice on the public forum.

Thank you Reg Man. That is helpful. The trouble is I have had two gas safe people quote for the same job. One has mentioned that I need a new 22mm but the other didn't mention it, even though both looked at it. I want to pick the right person to do it. I'm only asking because I thought that a forum would be able to tell me the way to go as I thought I would get the right advice from you all.

 

[AWheating]

you got the right advise, the only person who can answer correctly is the installer you use. The pipework will def need upgrading, if the second engineer has not mentioned it then phone and ask him/her what they have allowed for in the quote.

if you come onto a forum with a bad atitude you will never get help.

 

[Dotty]

OP I am closing this thread as you have been given more than enough advice. Get a gsr in to size your pipework properly. Rule of thumb doesn't exist in the gas industry and could well kill you.

Next time you cop an attitude with the members on here because you're not getting the advice you think you should will be the last. Take that as a friendly warning!

We cannot and will not give advice on the installation or repair of boilers, cookers or ANY gas appliances for your own safety.


Please go to Gas Safe Register | Ensure your gas engineer is registered. or post a thread in the 'I'm looking for a plumber / gas engineer' section of these forums remembering to include your location - [DLMURL="http://www.ukplumbersforums.co.uk/im-looking-plumber-gas-engineer/"]I'm looking for a Plumber or Gas Engineer[/DLMURL]

If you are gsr please increase your post count to 10+ then send a PM (Private Message) with your gsr details to either Gas man - http://www.ukplumbersforums.co.uk/users/8668/ or Redsaw - http://www.ukplumbersforums.co.uk/users/2718/ who will check you and then give you access to the gsr private forum.

Providing gas-related advice to anybody who should not be touching gas and cannot prove their competetence is unacceptable. We will take whatever action we deem appropriate to prevent such advice being given

Thank you.