Fresh water pressure problem

[Trojan]

Low air will not cause it to cycle every 25 minutes. Only a leak will. A closed system does not loose pressure. Adding air only makes the duration longer. Look for the leak. A water logged system justs cycles on and off while being used. Not at rest. No water loss. No cycle. Bill

[Pascal]

if you are using the galley Maid, it is supposed to have a check valve. on mine, it was originally located by the pump but the GM manual said it shoudl be as close to the tank as possible.

an easy test would be to cap the pump outlet and see if pressure holds...

lack of air in the tank may result in the pump cycling more often but any cycling meand pressure (water or air) is lost somewhere.

i'd check the valve first.