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Old 04-12-2017, 10:08 AM   #1
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Water comes to a trickle when 1/3 full - why?

I have a new FR Surveyor 275BHSS 5th wheel.

When we fill the fresh water tank (46 gal capacity) and use the water pump, things go fine at first. Then, when the tank gets down to about 1/3 (on the monitor), the water starts to trickle out of the faucet and then goes down to nothing, but monitor still reads 1/3 full. When we drained the tank from the low point, there was still water in the tank (not sure how much).

Is this normal for the water to start to trickle out as the tank gets lower?
If not normal, what should I do differently or check on?

Thanks much!
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Old 04-12-2017, 10:34 AM   #2
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It is not beyond belief (we've seen it here) that your water pump pick-up line may not be in the bottom of your fresh water tank.
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Old 04-12-2017, 10:40 AM   #3
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Mr Dan - How do you think I could check on it? Do you think it is something that could be changed (easily)?

Thanks
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Old 04-12-2017, 10:40 AM   #4
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It is not beyond belief (we've seen it here) that your water pump pick-up line may not be in the bottom of your fresh water tank.
X2... we've seen it reported on more than one occasion.
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Old 04-12-2017, 11:04 AM   #5
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Water comes to a trickle when 1/3 full - why?

Quote:
Originally Posted by LifeIsAnExperiment View Post
Mr Dan - How do you think I could check on it? Do you think it is something that could be changed (easily)?

Thanks
I've removed self-tapping screws to drop the belly cover under the fill end of my tank - looking at a bulging tank. You could check it that way. I have no idea how to seal the pipe if you move it. Maybe someone else will chime in.
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Old 04-12-2017, 11:15 AM   #6
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Here is on thread showing tank
http://www.forestriverforums.com/for...ter-34722.html
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Old 04-12-2017, 01:54 PM   #7
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I had that problem recently after unwinterizing. It turned out that I hadn't turned the pressure valve in the center, between the hot and cold all the way open.
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Old 04-12-2017, 08:07 PM   #8
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I had that problem recently after unwinterizing. It turned out that I hadn't turned the pressure valve in the center, between the hot and cold all the way open.
If you are referring to the bypass valve on the water heater (you called it a pressure valve between the hot and cold) for summer, normal operation, (unwinterize) that valve needs to be all the way closed.
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Old 04-13-2017, 07:23 AM   #9
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mine did the same thing but it had to be 2/3 empty
Its one of two things the pickup tube is not long enough or a valve is not in the right position
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Old 04-13-2017, 08:49 AM   #10
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If the flow gradually slows down, I would check to ensure the tank vent is open and operable. Might be pulling a suction. Some units have vent/overflow tubes with a valve on the end, or the tube could of been kinked during installation. Just another possibility.
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Old 04-13-2017, 09:19 AM   #11
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NMWildcat,

Thanks for your response. Where might I find the tank vent and the "vent/overflow tubes with a valve on the end"?

FYI, I have a sealed underbelly (so I have an idea of where the tank is, but not exactly sure).
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Old 04-13-2017, 09:38 AM   #12
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Quote:
Originally Posted by LifeIsAnExperiment View Post
NMWildcat,

Thanks for your response. Where might I find the tank vent and the "vent/overflow tubes with a valve on the end"?

FYI, I have a sealed underbelly (so I have an idea of where the tank is, but not exactly sure).
Well.... It depends. If you have a gravity fill, then sometimes the tube runs up beside the fill opening to a small screen that is part of the fill port. Most of our rigs had the tube routed out the bottom of the rig in close proximity to the fresh tank drain valve.

I know what you mean about the sealed bottom. I've gotten pretty good at dropping mine to fix stuff and see where lines and wires run
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