Thanks for the advice keego, especially regarding switching the tank fed cold to mains. Didn't think of that one!
Just one question about the pump - if I install a 3 bar pump, presumably I need to be careful that older fittings don't 'blow' under the additional pressure.
Is there anything...
I have a "traditional" vented hot water system - cold water tank in the loft, hot water cylinder in the airing cupboard and an oil-fired boiler downstairs. The system is a gravity system, no pump on the hot water side, but the CH is pumped.
Water pressure around the house though is not so...