2018 Regal 28 Express Fresh Water Issue, No Pressure

You can't hear the pump audibly cycle when you hit the "water pressure" switch in the breaker panel belowdecks?

The first thing you should do is to unscrew and clean/clear (with a hose or your finger) the small strainer basket at the pump. You can do this easily by hand. It might be clogged and blocking the flow of water into the pump.

I would then test the power leads at the pump, with a multimeter, to ensure that the pump is getting power. If it is not getting power, then you can trace back to the pressure switch.

Please let us know your diagnosis goes.

Last season I had put about a half-cup of bleach in my water tank, to kill the bacteria and other crud that had accumulated due to the previous owner not taking care of it before I purchased the boat. The bleach killed everything it should have, but the dead matter did create some sludge at the bottom of the tank. This season, when I commissioned the boat and filled up the water tank, it loosened the crap in the tank and stirred it all up, and this clogged up the in-line filter at the inlet to the water pump.

This then caused the pump not to cycle, and water not to flow through to the pump. Unscrewing the in-line filter basket and cleaning it solved the issue, and I've since done this a couple of times this season (no further blockage).

Also, if you haven't done it, I would also clean the filter basket at the through-hull for your A/C cooling water inlet. On the 28 Express, this is located to the aft starboard of the engine, right at the bottom of the transom in the bilge. You will see the clear plastic cap that you need to unscrew. Before you do this, though, MAKE SURE you move the through-hull valve lever to the CLOSED position so that water does not enter the bilge up through the A/C water inlet when you unscrew the cap. It is good to exercise this valve lever at least once a month, anyway, to keep it lubricated and operating well.