I have a Salamander twin pump that pressurises the entire house every time a hot or cold tap is turned on. It even comes on when you flush the loo. It's so noisy we've had it switched off for a couple of months now. The water pressure with the pump switched off is fairly pathetic (all gravity fed from the loft) but I've started to wonder if the pump itself might cause a flow restriction. Might I benefit from completely removing the pump?