Hi could anyone please tell me how to calculate the correct size of a mains fed cold water storage tank in the attic? The cold water storage that we have is the same size as the feed and expansion tank for the heating system, and I dont think its big enough? We have a Indirect Y plan heating system, with a mains fed thermo cylinder (albion mainsflow hot water tank). We have one bathroom and an ensuite upstairs (one shower, one shower bath, two toilets, and two sinks). Cheers.
usual size in a house min 50 gallons. Most F& E tanks are 4 gallon your main cistern cannot be this size!!
If you have a mains fed hot water cylinder then you don't need a cold water tank. I would follow the pipes from both tanks to see what they are connected to.
I think this is the bit you want. <u>Cold Water Storage Cisterns</u> Cisterns should be installed in compliance with Schedule 2, Section 7, paragraph 16 (including guidance and recommendation clauses) of the Water supply (Water Fittings) Regulations 1999 and the Water Byelaws 2000, Scotland and BS 6700 : 1997. A cistern used only to feed the hot water supply system should have a capacity at least equal to that of the hot water cylinder. If the cistern is also used to supply the Cold Water distribution, it should have a capacity of at least 227 litres.