gas supply to 15 kw boiler

6 Jun 2012
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United Kingdom
Hi. What size gas supply pipe is needed for a 15 Kw boiler? 15mm or 22mm ?
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Depends on length of pipe run, and number of elbows or bends,
as rule of thumb pipe size should NEVER be less than the boiler inlet connection, you will need to consult a gas engineer to survey and deign and install the pipe work ;)
Thank you for responding. The reason I ask is that I have had two gas engineers look at the job , and one says 15 is ok, and the other says 22 will be needed!!
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Ask them the reason, backed by calulation, the bore of pipe chosen:cool:
I think I've got it sussed. It's not really exact science, but the 22 needs to go to within 1 metre of the boiler if the boiler is not bigger than 15Kw or 25Kw. That SHOULD be ok but a test would need to prove it, and 22 put in if 15 was inadequate.
10mm should do it .. its cheaper :)
you may as well save money on material cause you dont have value for life if your doing it yourself.
sorry mis-read the post a enigneer who knows what he is doing

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