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Old 06-17-2008, 10:44 PM   #1
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12-volt fresh water pump

Do fresh water pumps have to have a pressure tank setup? Is a 2.8 gpm pump large enough?
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Old 06-18-2008, 12:12 PM   #2
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Re: 12-volt fresh water pump

So a pressure tank is needed, what can I use to build one? Do I install it right after the pump? Is there any type of special fitting or valve that needs to be in the line because of the pressure tank?

I plan to have a kitchen sink, toilet and tank-less hot water heater.
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Old 06-18-2008, 12:37 PM   #3
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Re: 12-volt fresh water pump

I bought a surge tank from an RV supply, it's about the size of a large potato and does a good job. If you buy one for a shallow well pump it might be too large, I'm not sure. I would reccommend using one or the pump will cycle all the time and burn up. Also the RV style surge tank has pipe threads which I screwed right to my pump and then a fitting to run PEX tubing on the other side which I also reccommend using. I also got a sediment bowl/screen type filter to keep unwanted uglies out of my water supply and pump. Don't forget to drain all this when winter comes or it will all freeze. sportyrick
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Old 06-18-2008, 12:41 PM   #4
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Re: 12-volt fresh water pump

Hi Rick, thanks for the post (and everyone else as well).

I am checking Google for them now, I found this tank here for about $40.00 bucks Click, that's not bad.

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Old 06-19-2008, 09:49 AM   #5
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Re: 12-volt fresh water pump

that picture is exactly what I have. It does hold a little water and keeps the pump from running all the time. You can get about a cup of water out of the system before the pump starts up or if you have a dripping faucet it will keep the pump from running constantly on and off. It doesn't take much water loss to drop the pressure and start the pump if a bladder isn't present. It's a smaller version of the system that I had with my deep well pump when I lived in the country. sportyrick
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