Stephen Maginnis
Hi Valerie If its a combi boiler a pump not advised, but if a conventional boiler & cylinder a single 1.5 bar min with a flow switch could be fitted. Please note you may just have the wrong taps fitted, if you have flexy pipes fitted to your taps they might be high pressure taps fitted to a low pressure system. You can purchase low pressure taps from a diy store like B & Q look for around 0.3 bar they are available read on the box before purchase. Regards Steve