On a filling loop, which way do I position the tap to prevent water flowing into the boiler?
ie: parallell to the pipe (pressurising the boiler?), or at right angle to the pipe (mains supply is off and boiler is not being pressurised?)
Recently had new low pressure switch fitted, now water only hot when CH is on, otherwise water is only cool - not even hot enough to wash up with! Any ideas :?: