Water pump under sink won’t pressurize

[tranquil]

Just launched, filled my water tanks and flipped on the water pressure switch. In the past the pump pressurizes after a minute or two and then turns off, at which time I open all the through holes and run water through each sink and the showers.

Before filling the tanks, I went into the transom and closed the white round spigot at the bottom of the hot water heater that I leave open in the winter

There is no water coming into the bilge and I don’t see any leaks anywhere. Any idea what could be causing this? I cleaned out the filter on the water pump under the galley sink last spring and in freshwater. It doesn’t get dirty very fast and is still clear in color

Thanks

[wolfe10]

With water in the tank and the undersink valve on the tank you filled, open a faucet and turn on the pump. Much easier for the pump to prime with a faucet open.

[tedseward]

I just went through that when dewinterizing my boat. One likely possibility is the system is filling the hot water tank. It takes 11 gallons and the pump will run quite a while until the tank is being filled. You can kind of scope out what is happening by switching the faucet from cold to hot. There will be a fair amount of spitting and splashing while the pressure is equalizing.

[tranquil]

Thanks to all for replies.

After 5 hours I was able to get water to the head sink and shower, but not in the galley. Didn't try the cockpit It was late so I had to leave. I did clean the filter, which had just a few grains of debris. I did run with the faucets open but still nothing from the kitchen sink. All applicable on manifold are open. Had to leave as it was late and dark, so I will try again this weekend. Confusing as has never happened before.

[wolfe10]

Start by removing the aerator from the sink faucet. It may be clogged.

[tranquil]

Yes despite replacing the faucet head last year, it was completely full of gunk and you are correct that was the issue! I was very surprised as I sail Lake Michigan from June to the end of September and the previous Fossett head lasted eight years before I had to clean it out

Thanks again