i have recently replenished the air gap in the megaflo and now am having problems with the pressure in my showers. if i run a hot tap first then use the shower i get a constant, albeit reduced, flow of water. if however i try to use the shower without running a tap, i get hot water, at reduced flow, but no cold water or it starts off fine but then just gets hotter and hotter and the flow reduces. any ideas?
