Send Over-Pressure Shore Water Over the Side with Pressure Valve ?

[sdowney717]

I have a 75 lb over pressure valve not hooked up yet.
I was thinking to put it into the shore side line with a tee so if the pressure was too high, it would release the pressure and send it overboard.
I think it used to be setup to vent into the bilge.

How many situations would you find where marina water pressure was that high?
I never have, they all seem rather low and weak pressured.

[GordMay]

A shore side water pressure regulator/reducer should limit inlet water pressure to 35 - 45 psi, and have a built-in backflow preventer.

[sdowney717]

Oh your right, I forgot I do have a regulator, I think taco branded.

I have this overpressure valve which I dont know why it was ever put on the boat.
It used to be plumbed into the hot water heater, YET that heater also has the temp pressure relief valve some maybe it was leftover from a prior owner.
I saw the same valve at Lowes in the well water pump section and it had a pressure rating of 75lb.
So perhaps it has no value or use on the boat anymore.

[osirissail]

You must be filthy rich if you can dump water over the side. Marinas I know charge per gallon and it is not cheap. Get a pressure regulator from an RV store.

[sdowney717]

water and electric are unmetered at our slips

I dont abuse the privilege.

[billknny]

Originally Posted by sdowney717

I have a 75 lb over pressure valve not hooked up yet.
I was thinking to put it into the shore side line with a tee so if the pressure was too high, it would release the pressure and send it overboard.
I think it used to be setup to vent into the bilge.

How many situations would you find where marina water pressure was that high?
I never have, they all seem rather low and weak pressured.

Marinas in populated areas are hooked to city mains. Mains water pressure can be as high as 80PSI--depending on what city, and where you are in the distribution system.

The simple answer is NO... you can not use this to regulate your water pressure. If you came to a marina that had 80PSI city water, it would be dumping water overboard ALL THE TIME!!!!

Use a proper pressure reducer if you really have to connect to the mains water supply. Although as a word of warning: I have seen three boats sink at the dock because they were connected full time to marina water.

A relief valve like this belongs only on the outlet of the water heater in case it over pressures. A "temperature" valve does not do the same thing and I don't think that is what you have. Every water heater NEEDS a PRESSURE relief valve.

[a64pilot]

I wouldn’t connect shore water to my boat, that could sink it.
I fill my water tank and run off of that. I know if connected to shore water that would save wear on my pump, but I don’t think the risk is worth it.

[StuM]

Originally Posted by a64pilot

I wouldn’t connect shore water to my boat, that could sink it.
I fill my water tank and run off of that. I know if connected to shore water that would save wear on my pump, but I don’t think the risk is worth it.

+1