DIY Doctor UK DIY Forums

hello all

is there anything fundamentally wrong with a 15 mm supply to a bath, as opposed to the 22mm, other than it will take longer to fill?

On a combi system if that matters.

Thanks for any advice.

Allan

A typical bath can be about a 100 litres. A typical header tank system with stored hot water and 22mm pipes to the bath can fill it at 20-30 litres a minute. i.e between 3 and 5 mins.

With sufficient pressure a 15mm pipe could easily deliver 15-20 litres a minute but as your combi is probably only capable of producing about 12 litres of hot water a minute, then that is the limiting factor and is why it will take so long to fill your bath.

Regards

Oldie,

thanks for the reply

Allan