Yes thats correct, I was thinking of installing pressure booster pump on the outlet of the tank but other guys here suggest that it may not resolve the problem as it is the flow problem not pressure.
Hi
I visited a house where when someone opens cold water tap anywhere in the property flow to the electric showers stops completely. They have big tank in the loft which gets filled up with cold water like your toilet cistern. They also have got combi boiler installed, no hot water cylinder...