I am extending my house with a 2 storey increasing kitchen/dinning and adding extra bedroom and a bathroom. This will give me a big house with 5 bedrooms. The current house has central heating etc. Although my builder will be doing the plumbing I want to make sure I have the right system correctly installed. I will be buying new boiler and cylender. I have been advise to go for 33kw Boiler and 210 L main fed cylender. Can someone advise if:
1) Is it ok to fit the new system to the current system (I think the current one has 10mm pipes)
2) It's ok to use plastic pipes rather than copper?
3) My builder says I should go for 10mm plastic pipe otherwise he will have problem with plastering. Is he right or should I go for 15mm.
Any advise will be welcome. This extension has given me a lot of headace with things going wrong. Thanks.
thanks a lot for you advise. It's the best detailed advise I have had so far. Can I just clarify, are you saying I should not go for plastic pipes even if it's 15mm. Can plastic pipes not take the pressure in the pressurised system?
The problem I have is my builder is doing everything himself and it seems he will be laying the pipes and get a 'corgi' plummer to fit the gas. He's saying he can only fit plastic pipes in the price. I will be buying all the bits like boiler etc. Basically he's no help and I have a contract for him to do the plumbing.
I will also have to work out the size of radiators. I have checked on internet for cals and I found all of them gives me a different BTU for the radiators.
Not sure if I should get another plumber to get it right or whether to let him do his way? I will look at the range you have suggested.
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