Join Date: Jun 2011
Location: somewhere south of civilization
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cooling water back pressure
Sorry, not cooling water, but feed water.
We've been using a 12 volt Water Puppy (6.3 gpm) as a boost pump for our watermaker, but they do not like the back pressure from the high pressure pump (2.3 gpm) and over heat and fail after some time.
We have a 110 volt Dometic/March water cooled continuous duty magnetic drive pump (8.3 gpm) that will do the job quite nicely, but I have no idea if the back pressure will damage the magnetic drive pump.
I assume that the magnetic drive will not be affected by back pressure, as the Water Puppy was, because there is no direct drive between the motor and impeller. We have run the magnetic drive pump with the thru hull partially open and that does significantly reduce the water flow, but again, I have no idea if this will damage the pump.
We would appreciate any thoughts on this.
"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows
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Last edited by capta; 03-21-2020 at 04:59 PM.