replacing water tank in loft

21 May 2005
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United Kingdom
I currently have a four gallon central heating expansion tank and a 25 gallon hot water feed tank. I'm having an extension built and need to move these tanks to a new loft. Please can someone tell me if I can just use one tank? Also, do I need to have a 25 gallon tank - can I use a smaller tank? And, where is the best place to buy by mail order?

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you could get rid of small expansion tank by converting to unvented heating system at not too much cost ??
hot water feed tank would be a bit more expensive to get rid of as unvented hot water tanks start at about £500 upwards if it was me and your current boiler wasnt that new i would put a combi boiler in ??
definately dont fit smaller than 25 gallon tank though as the norm is 50 ??

You need 2 tanks, unless you decide to put a combi in.

Min size for a tank which supplies a cyl and cold supply is 120 litres (or thereabouts , I can't remember the exact figure).

Screwfix is quite good but do a search :D
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