I am proposing to fit a pressurised hot water cylinder with an
expansion vessel after our newly installed combi.
This could eliminate the start-up and early temp fluctuaion
problems of the combi.
I could keep the water at a constant temp with an immersion
heater and prevent backflow with a double check valve.
It would also enable us to draw hot with VERY low flow rates for
late night showers etc.
Is this viable at all, has anybody tried it?
Cost may be prohibiting though.