I lost all pressure in the fresh water system this weekend. Not a drop from either sink despite the pump running continuously. I traced the problem to the outflow hose from the electric water heater. It had come off of one of the two T connectors located under an access port beneath the sink in the head. No hose clamp was seen, but it may have fallen into an inaccessible area of that compartment. I got the hose reattached and clamped, but not before accumulating 1/2 inch of water in that compartment that doesn't drain to the bilge and is really hard to get to. I finally settled on a turkey baster. The starboard lazerette also flooded, but that was easier to clean up. I surmised that hot water in that hose might have caused it to loosen, especially if the hose clamp was missing or not tight. Just a heads up that you may want to check that all the hose clamps in that area are tight.