Anybody know about Accumulator Tanks?

[vyv_cox]

>I have a two litre metal one on the boat and a 1 litre plastic one in the camper. Each has hot and cold at the galley and hot and cold in the heads, plus the camper has hot and cold shower supply.

I think you are talking about calorifiers not accumulators. Both are pressurised but a calorifier has a heating element and usually can be heated by engine water.

Please engage brain before addressing keyboard! Firstly, I am very well aware of the difference between accumulators and calorifiers. Secondly, a 1 litre plastic calorifier is not going to be a lot of use to anybody. Thirdly, my camper doesn't have a calorifier anyway, unfortunately, and I am not aware of any that do.

So far as adjusting the cut-in pressure of the accumulator is concerned, I run the water pump by turning on a tap. I then pump air/release air into/from the space above the bladder to optimise the pump's off period. Saves lots of messing about trying to measure the precise pressure.