Fresh water tank pump died.

Jul 7, 2004
8,536
Hunter 30T Cheney, KS
The 35 year old pump/accumulator that feeds my galley and head faucets isn't pulling water anymore. When it worked it cycled a lot to keep pressure. I want to replace it with a new model and do away with an accumulator. If it matters, I have a 10" CBC-10 carbon filter between the pump and faucets. Any suggestions?
 

Ward H

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Nov 7, 2011
3,833
Catalina 30 Mk II Cedar Creek, Bayville NJ
I installed this pump 3 years ago after finding many good reports on it:
PENTAIR SHURFLO 4148-153-E75 Aqua King II Premium Fresh Water Pump 4.0

I'm very satisfied with it.
I understand that newer pumps no longer need an accumulator to keep the pumps from turning on every time you open a faucet. Unless I turn the faucet on full I can get enough water to rinse my hands without the pump coming on so I did not install one.
 
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Jul 7, 2004
8,536
Hunter 30T Cheney, KS
I installed this pump 3 years ago after finding many good reports on it:
PENTAIR SHURFLO 4148-153-E75 Aqua King II Premium Fresh Water Pump 4.0
Interesting. Home Depot even sells this one! I get a veteran discount too.
 
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Likes: BigEasy
Jul 7, 2004
8,536
Hunter 30T Cheney, KS
I think I may dismantle my old pump and see what's wrong with it first. It would be disappointing if it just lost its prime
 

colemj

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Jul 13, 2004
1,075
Dolphin Catamaran Dolphin 460 Mystic, CT
That Marco is pricey. :(
But it is an excellent pump. Will easily outlast the cheaper diaphragm pumps, and be the last pump you buy.

I don't even think it is more expensive. At least not more than the Shurflo pump you are looking at. I got our Marco here: https://mareshop.eu/en/products/mar...v-16460215-n-a?_pos=2&_psq=marco&_ss=e&_v=1.0

We are so done with the cheaply made diaphragm pumps foisted onto the boating market. Once you have a Marco gear pump in your hands, you immediately see how it is another world of quality and robustness entirely.

Mark
 

colemj

.
Jul 13, 2004
1,075
Dolphin Catamaran Dolphin 460 Mystic, CT
BTW, don't worry about it being listed as not in stock and backordered. These pumps are drop-shipped from the manufacturer when ordered, so hardly anybody has them "in stock".

Mark
 
Jan 7, 2011
5,930
Oday 322 East Chicago, IN
I think I may dismantle my old pump and see what's wrong with it first. It would be disappointing if it just lost its prime
Did you solve the issue?

my pump started acting funny after I changed out an elbow in my system. Thought the pump was shot.

but after checking ChatGPT, i rechecked the suction side hoses, and there was a small air leak allowing air into the pump.
fixed that air leak, and the pump works great.

greg
 
Jun 21, 2004
3,133
Beneteau 343 Slidell, LA
I think I may dismantle my old pump and see what's wrong with it first.
Mine became problematic approximately 5 years ago. The OEM pump was 15 years old. I checked out the cost of replacing the rubber diaphragm & rubber valves; however, the cost of the rubber goods & shipping was 2/3 the cost of a new pump. I replaced it with a new pump that had the same rating & footprint.
 
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Jul 7, 2004
8,536
Hunter 30T Cheney, KS
Mine became problematic approximately 5 years ago. The OEM pump was 15 years old. I checked out the cost of replacing the rubber diaphragm & rubber valves; however, the cost of the rubber goods & shipping was 2/3 the cost of a new pump. I replaced it with a new pump that had the same rating & footprint.
I looked at a rebuild too. I went ahead and replaced my pump and my accumulator. I assume they were both original. The new pump pulls water from the tank now and the accumulator holds onto the pressure. No more random pressure buildup cycling.
 
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