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03-29-2017, 04:06 PM
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#1
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Senior Member
Join Date: Jan 2014
Location: Los Lunas, New Mexico
Posts: 3,766
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Where does that water come from????
 Why do my fresh water tanks fill when I am hooked up to campground water? I always have to dump at least 40 gals. out before I leave the campground. Is there a valve open somewhere that I should close when at a full service campground? My 24FBS TT has 2 fresh water tanks.
__________________
2018 Eagle HT 26.5 RLDS. SOLD
2009 F150 Supercab UNICORN, 5.4L ,3.73, HD and Max Tow Packages, Timbrens, Bilstein shocks.
Wet bolt kit. Andersen Ultimate 20K hitch. TST 507RV TPMS. Hydro Life HL-200. 16" Goodyear Endurance. Progressive EMS. SteadyFast Stabilizers. Furion backup camera.
Best friend wife, Di, and dog Cooper. RETIRED
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03-29-2017, 05:30 PM
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#2
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Senior Member
Join Date: Dec 2015
Location: Arizona
Posts: 2,324
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Might check your control set up by your hose fill connection. We thought we filled our fresh water tank. Only to find out it was on fresh water hook up for camper only. LOL Happy Trails
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03-29-2017, 06:39 PM
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#3
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Senior Member
Join Date: Aug 2015
Location: Albany, OR
Posts: 692
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If I remember correctly there is a check valve inside the water pump that prevents backfilling the water tanks. Valve is probably sticking or possibly bad.
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2015 Jayco 27RLS
2015 Ford F250 6.7PSD
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03-29-2017, 06:57 PM
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#4
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Senior Member
Join Date: Aug 2013
Location: Missoula, Montana
Posts: 704
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There are only two routes into the fresh water tank, back through the pump (and past the check valve), or via the tank fill outside.
Next time try closing both valves on the suction side of your pump, the one from the tank and the winterizing hose.
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"I might be movin' to Montana soon..."
2020 Outdoors RV Glacier Peak Titanium
2013 Eagle 29.5RKS (traded in)
2013 Ford 6.7L diesel F350
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03-29-2017, 07:23 PM
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#5
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Senior Member
Join Date: Aug 2016
Location: Denver
Posts: 1,580
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This is more of a feature than a defect if you can figure out how to make it stop.
I'd love to be able to fill my FW tanks this way from time to time.
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2016 27BHS Elite
2012 F-150 EcoBoost / Max Tow (Sold)
2017 'Blue Jeans' 6.2 F-250 Lariat 4.3 gears.
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03-29-2017, 07:29 PM
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#6
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Senior Member
Join Date: Nov 2014
Location: Florien, LA
Posts: 1,872
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I say most times it's the check valve at the pump. Our class A would do this, but only when the water pressure reached 50 psi. At 40 it wouldn't leak. That said though, some will leak regardless and it just needs to be fixed.
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John and Rebecca Dickson
Emma-13 / Little John-10 / Iva-7
2013 Ford F-350 Lariat FX4, CC LB PSD, DRW
2015 Jayco Jay Flight 28BHBE (#8)
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03-29-2017, 09:38 PM
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#7
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Senior Member
Join Date: Jan 2014
Location: Los Lunas, New Mexico
Posts: 3,766
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All.....thanks. If the weather holds tomorrow, I will close both valves suggested on the suction side of the pump and see what happens. If that's not it, the check valve would be the next to fix. Is the check valve inside the pump or outside, like on the black tank flush line? I'll let ya know.
__________________
2018 Eagle HT 26.5 RLDS. SOLD
2009 F150 Supercab UNICORN, 5.4L ,3.73, HD and Max Tow Packages, Timbrens, Bilstein shocks.
Wet bolt kit. Andersen Ultimate 20K hitch. TST 507RV TPMS. Hydro Life HL-200. 16" Goodyear Endurance. Progressive EMS. SteadyFast Stabilizers. Furion backup camera.
Best friend wife, Di, and dog Cooper. RETIRED
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03-30-2017, 08:57 AM
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#8
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Senior Member
Join Date: Jun 2011
Location: San Jacinto, Calif
Posts: 459
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The pump is bad. My Jayco did it when new and the pump was replaced. My friends Dutchman and Forrest River both did it and once the pump was replaced it was fine.
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If you are born once you will die twice
If you are born twice you will die once
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03-30-2017, 03:02 PM
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#9
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Senior Member
Join Date: May 2014
Location: Missouri
Posts: 222
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Pump is good, it's just the check valve. Replaced mine for about $14. Easy job. It will also cause the pump to run when pressure bleads off.
Part number. SHURflo 94-237-00.
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2015 Jayco Jayflight 24FBS
2013 F150 Super Crew 3.5, 3:31
2004 f150 Super Crew 5.4, 3:73 traded
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03-31-2017, 07:19 AM
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#10
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Senior Member
Join Date: Apr 2016
Location: Weatherford
Posts: 505
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Mine did that on our first trip. I just turned off city water, and turned on the pump and let it pump out the tank by turning on a faucet. Apparently whatever was making the check valve stay open in the pump got flushed out. The problem hasn't reappeared.
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Jack and Delores, Weatherford, Texas
2016 White Hawk 28DSBH TT, 2014 Ram 4X4 2500 CTD
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03-31-2017, 09:19 PM
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#11
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Senior Member
Join Date: Jan 2014
Location: Los Lunas, New Mexico
Posts: 3,766
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Quote:
Originally Posted by havnfun
All.....thanks. If the weather holds tomorrow, I will close both valves suggested on the suction side of the pump and see what happens. If that's not it, the check valve would be the next to fix. Is the check valve inside the pump or outside, like on the black tank flush line? I'll let ya know.
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Found the solution today (I hope). One of the pump valves was open probably allowing city water to pass thru the pump and into the fresh water tanks. Haven't filled with city water yet but hope it's not a check valve problem. If it is the check valve, how do I replace it?
Happy RVing,
Jeff
__________________
2018 Eagle HT 26.5 RLDS. SOLD
2009 F150 Supercab UNICORN, 5.4L ,3.73, HD and Max Tow Packages, Timbrens, Bilstein shocks.
Wet bolt kit. Andersen Ultimate 20K hitch. TST 507RV TPMS. Hydro Life HL-200. 16" Goodyear Endurance. Progressive EMS. SteadyFast Stabilizers. Furion backup camera.
Best friend wife, Di, and dog Cooper. RETIRED
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