Water Pressure breaker
 

Anyone know what the water pressure breaker on the breaker panel in the cabin of a 2005 36CC does? I have separate fresh and salt water pump switches on the dash that work those pumps. I’m trying to figure out what the breaker below does. When I flip it on, I hear a pump come on that sounds like it’s near the bathroom.

pressure pump for the sink and head?

Easy to check.. with the breaker off, turn the water in the sink on and run down the water/pressure. With the water pressure running low, turn on the breaker - if the pressure bumps up - that's definitely what it is for.

doesn’t seem to make any difference with the breaker on or off, tried that.

the sink and head run off the fresh water pump switch on the console.

it might be the pump to the shower gray water instead of dumping in the bilge it goes in a container and gets pumped overboard or to a gray water tank....or it could be a wash down pump

Overload protection for the water pumps? The switches at the helm most likely just that, a switch, not a circuit breaker. Just from your description to me it sounds like if water pressure got too high from a pump running too long etc, the pump overloads, draws too much current and the breaker trips. I could be looking at it totally wrong but that’s what I get out of it from the description.