Water pressure

[shibli]

Hi

I am currently building a dormer conversion which will include a new bathroom therefore will have 2 bathrooms and am looking to upgrade our current combination to a system boiler with a pressurised cylinder. My question is do I need to upgrade my cold water pipe to a 22mm even though I have what I believe is high pressure water flow from my kitchen sink?

Thanks,

 

[muggles]

Your installer will be able to advise you on what's necessary when he visits to quote (you need to be qualified to install pressurised cylinders).