Air in fresh water lines on Pearson 424

[pma_foyl]

I have a 3-tank fresh water system with 3 isolating valves and a foot pump.

Sometimes when running a facet, the electric water pump will start running and NOT re-pressurize the system due to air in the lines.

My question is: Where could the air be coming from. I have all 3 tanks nearly full. It sometimes happens at the dock, so no "heeling" is letting air in. It''s very inconsistent. I sometimes go weeks with no issues; then it''ll happen four or five times in a day.

Any ideas how I might resolve this problem?? Thanks.

[Denr]

Sounds as if you have the LHC syndrome. (Loose hose clamp) Good luck trying to find the damn thing!