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Old 11-03-2003, 02:44 PM   #1
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Fresh water tank question

Not a fix-it situation, but I don't understand how to use it. I put about 20 gallons of water in it, turned the pump on (in the bathroom) and nothing comes out of the faucets. I hear the pump running however. Why is that? Am I forgetting something?
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Old 11-03-2003, 02:59 PM   #2
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sounds like a "fix-it" situation to me, because its broken!

the pump should pressurize the pipes, then shut itself off. when you open up a faucet, water should then come out...the pump will turn itself on again in an effort to keep the lines pressurized. when you close the faucet, the pump should continue running for a few more seconds, then shut itself off when the pressure in the lines builds back up.

so it sounds like your pump is running ok, but not pumping anything. It could be that the pump needs to be re-built, or replaced...the diaphrams are worn out, etc. not too difficult to do. replacing the pump is easy, too. I replaced the original in mine, and only then did I find out that the intake line had a crack in it...so the pump was just sucking air when it was on. I installed the new pump anyway...never checked the old one. its sitting on a shelf in my basement, but for all I know, it works fine.
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Old 11-03-2003, 03:03 PM   #3
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It sounds like it is either sucking air, or has a bad diaphram. You likely have a Sureflo pump. Rebuild kits are available, and even a new pump is not a prohibitive expense.

Mark
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Old 11-03-2003, 05:16 PM   #4
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That makes sense.
How do I replace the pump, where is it located?
Where do I get a replacement? Online? Ebay maybe?
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Old 11-03-2003, 05:23 PM   #5
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Lightbulb Had the same thing..

ipso_facto
I had the same problem with my '84 when I first got it..In my case, the unit had sat for nearly 15 yrs.. it turned out to be the bass pressure valve, which is right next to the stainless steel inline filter. I just simply took it out at the time..(I wanted water~!)
FWIW.. the pump in my unit, which is close to yours in age, is located under the floor in the main closet` just lift the false floor..

ciao
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Old 11-03-2003, 05:30 PM   #6
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Camping world has them and there are a few models to choose from. It all depends on how quiet you want it, what GPH you want and how many amps does it draw.


Cheaper = noiser, bigger amp draw, and adequete flow 35 PSI

More expensive = quieter, lower draw, and better flow 45PSI

Very expensive = Whisper quiet, Huge draw, waterfall flow.(you need tobe careful some of the new ones will go to 100PSI)

Before you spend ths $$ on a pump check the intake strainer. It may be cracked and allowing air into the pickup line from the tank.

Pump is sometimes located under the kitchen sink mounted to a shelf on the interior wall. replacement is normally a couple of hose clamps, a few screws, an a wire or two.
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Old 11-03-2003, 05:35 PM   #7
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Make sure your drain valves aren't open, look under the trailer with the pump running for water coming out.

John
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Old 11-03-2003, 05:42 PM   #8
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Mine seems to have a hard time priming. I usually hook up the hose to get water/pressure in the lines and turn on the pump for a minute. I then disconnect the water hose and the pump is working fine. It just needs a kick start.
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Old 11-03-2003, 06:58 PM   #9
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you might also look and see if there is an inline filter somewhere that is clogged. Mine had a nasty clog when I got it, and I replaced the filter only, and all is well.
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Old 11-05-2003, 09:16 AM   #10
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Success, kind of. I closed the pipe where water hose is connected to (water was coming out of it) and I was able to get some water to come out after 30 seconds. The flow however was not as strong as when connected to the shore water. Probably 1/4 strong at best and kind of irregular. Do I have air trapped in the lines? Should I connect the main water hose and get all the air out?
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Old 11-05-2003, 09:22 AM   #11
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Sounds like your in line check valve has gotten stuck open, that is why the water is coming out the inlet. This is a typical problem, a cap is the easy resolution.

As for flow, what you describe is the normal way water flows when on the pump. If you want a smoother higher volume flow you would either have to upgrade to a higher volume pump, or add an air bladder into the system. The pulsing is normal, lower pressure is normal.
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Old 11-05-2003, 09:35 AM   #12
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in line check valve has gotten stuck open

What is that? Where is it located?

What are my options for increasing the flow, meaning what's the easiest thing I could do? How popular are the mods you mentioned?

Also, where the filter located? The pump is under the closet floor, at least that's where it's noise is coming from.
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Old 11-05-2003, 10:57 AM   #13
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the in line check valve is just before the pressure regulator on the city water inlet line. Depending on where your city water comes in and floorplan it could be in a cabinet or under a bed.

The water pum is normally accessable from inside th caoch. Sometimes they are a bit clever in where they are hidden. Run the pump and try to find the noise. You may have to do some dissassembly to find it.

The best way to get better and smoother pressure is to replace the pump. I went with a VSD (variable speed) Sureflow that will do 4.5 GPM and shuts off at 45 psi. The flow is smooth and the noise is minimal comapred to a normal pump. You want to use a pump designed for multiple fixtures.
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Old 11-05-2003, 11:19 AM   #14
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The best way to get better and smoother pressure is to replace the pump. I went with a VSD (variable speed) Sureflow that will do 4.5 GPM and shuts off at 45 psi.


What GPM is the default pump on my unit?
What's the best source of these pumps? Ebay currently has one rated for 2.8gpm. .


I wonder if I should just leave it alone, given that the fresh water tank capacity is pretty limited and 4.5gpm will empty it pretty quickly.
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