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05-06-2022, 06:26 PM #1
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Water Pump Won't Pump with 1/3 Full Tank
The title says it all...
I've got a 50 gal fresh tank. Everything works fine when I've got a half tank or more. But when I get down to what I estimate to be 15ish gallons, it sputters and stops flowing. But the pump is still running.
No leaks that I can find.
Anybody have the same problem? Got a fix? New pump maybe?
Thanks guys...
Boom
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05-06-2022, 06:39 PM #2
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Maybe your estimate is off?
Howard and Peggy
2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
His: 1999 Honda Interceptor
Hers: 2013 Spyder ST-S
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05-06-2022, 06:47 PM #3
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I use a gallon counter when filling the tank and the tank monitors seem to be accurate to my gallon counter. When the pump stops pulling the water it reads 1/3 full. Plus it takes 2 to 4 minutes to dump what's left thru the 2 inch fresh water dump valve. I think 15 gallons plus or minus 3 is a good estimate.
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05-06-2022, 06:54 PM #4
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Has it done this from day one, or is it a recent occurrence? Sounds like the draw point isn't low enough.
Howard and Peggy
2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
His: 1999 Honda Interceptor
Hers: 2013 Spyder ST-S
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05-06-2022, 07:04 PM #5
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05-06-2022, 07:18 PM #6
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Did you try to pump all the water out at one time? Some trailers have two tanks connected by a relatively small line, so you can drain one tank quickly enough that the supply from the second tank can't keep up. If that isn't it, I'm all in. You may be able to post a query on the Winnebago forum, I assume there is one but don't know positively, and someone may be able to help you more than I. Good luck.
And if you get it resolved, please post back with the solution. TIA.Howard and Peggy
2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
His: 1999 Honda Interceptor
Hers: 2013 Spyder ST-S
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05-06-2022, 07:32 PM #7
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Thanks Howard. Unfortunately the Winnebago forum is under utilized. Especially for towables. Most people there own some style of motorized rv.
I started my rv adventure with a Grand Design and found this forum. It has been a great source of information. Plus on rare occasion I can help others here with my experiences...
After buying Grand Design 6ish years ago, Winnebago began 'borrowing' GD's design ideas and process'. Thus the similarities in engineering and systems. My 2021 Voyage 5th wheel is a much beefier version of the Reflection 29RS.
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05-06-2022, 07:37 PM #8
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With any luck someone will drop in with some insight.
Howard and Peggy
2019 Momentum 351M, and 2018 RAM Cummins dually 6-speed.
His: 1999 Honda Interceptor
Hers: 2013 Spyder ST-S
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05-06-2022, 08:51 PM #9
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Remember that 6 of those 15 gallons are possibly in the HW tank, but that should not impact the 1/3 read on the tank monitor. I have not experienced the issue with our rig but I would also suspect it a pick up issue in the tank and not a pump issue.
If the pump runs but does not pull water at 1/3, I think you may have identified your problem.Geoff and Cheri
2011 F250 CC 6.7L
Firestone Ride Rite Airbags
Pull Rite 16k SuperGlide
2018 Reflection 303RLS, Build date 9/2017
USMC-Retired
Thin Blue Line - Retired
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05-07-2022, 06:57 AM #10
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Bottle Jack
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