Keeping the pressure on the taps
I am fitting out my boat with the galley at the back and the toilet/shower halfway along. I am concerned that the toilet/shower taps will take all the water flow from the galley. Also, what is the air pressure setting for the accumulator?
BOB NEIL, via email
TONY REPLIES: As long as the water pump delivery volume is more than can flow from an open tap, you need not worry. Many boats are the reverse of this (with the galley closer to water pump) and have few problems. Yours is just the opposite way around.
You could run the main cold supply pipe from the pump to the calorifier in 22mm pipe with the cold supplies Teed off it in 15mm pipe. However, if the pump delivery cannot keep all of the outlets operating this will make little difference. The accumulator stores a volume of water under pressure, so that as the water in the calorifier cools and contracts the pump does not run at night. It also allows you to draw a little water without the pump running so reducing pump cycling.
It should be set to the pump cut in pressure (but it is easier to set it to about half the pump cut-out pressure as that is written on the box).