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12-03-2024, 06:08 PM
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#1
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New Member
Join Date: Dec 2024
Location: Clermont
Posts: 2
M.O.C. #35086
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Water Pump
When I turn on my water pump, it pumps the water out of my city water connection. I'm I doing something wrong?
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12-03-2024, 06:13 PM
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#2
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Montana Master
Join Date: Jan 2022
Location: Shingle Springs
Posts: 2,813
M.O.C. #30417
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Quote:
Originally Posted by mjshatto
When I turn on my water pump, it pumps the water out of my city water connection. I'm I doing something wrong?
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Welcome to the MOC. When connected to city water do not turn on the water pump. 
__________________
Tony & Donna & the best dog ever, Murphy.
2022 Montana HC, 295RL, 720 watts Solar, Onan 3600 LPG, 2K inverter, 200AH Lithium. 2020 GMC Denali 2500 6.6 Duramax, Demco 21K Auto Slide
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12-03-2024, 06:18 PM
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#3
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New Member
Join Date: Dec 2024
Location: Clermont
Posts: 2
M.O.C. #35086
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I'm not connected to city water. Trying to pump from the fresh water tank. When I turn the water pump on it pumps water out of the city connection.
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12-03-2024, 06:33 PM
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#4
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 4,174
M.O.C. #20477
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Martin,
First, welcome to the forum!
Sounds like the check valve in your water pump has failed.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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12-03-2024, 06:37 PM
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#5
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Montana Master
Join Date: Oct 2018
Location: Anderson
Posts: 2,908
M.O.C. #22835
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Are you flipping the valve from "fill" to the normal run position or are you leaving it on "fill". If you leave it on "fill".... don't. Flip it to the normal run position. "Fill" is ONLY for filling. After filling, flip the valve back immediately.
__________________
History is not about the past, it's an explanation of the present.
2019 Montana High Country 375FL
2014 Chevy Silverado Duramax, 6.6L Dually
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12-03-2024, 06:47 PM
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#6
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Site Team
Join Date: Oct 2005
Location: Carmichael - CA
Posts: 7,909
M.O.C. #4831
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Isn't there a check valve in the input water connector? I seem to remember it sticking open. Or am I dreaming, again.
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Carl (n Susan)
There is more to life than fuel mileage.
2012 Montana 3700RL Big Sky Package towed by a 2015 Ford F350 6.7L PSD 4WD CC LWB
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12-04-2024, 05:11 AM
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#7
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Montana Master
Join Date: Oct 2019
Location: Jacksonville
Posts: 2,362
M.O.C. #25165
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You're right, Carl. There should be a check valve on the city water input side as well as on the pump input side.
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Robert & Diana McNeal
2019 Montana Legacy 3791RD 20th Anniversary Edition
2014 F350 4x4 6.7L SRW
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12-04-2024, 08:36 AM
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#8
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Montana Master
Join Date: May 2019
Location: Alton
Posts: 3,020
M.O.C. #24086
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There is a check valve in the city water port.
Take it out and verify it was put in correctly (not reversed). If that's good put a plug in the port until you replace the check valve.
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Daryl and Marianne,
2019 3130re 20th Anniversary Edition
2016 F350 Lariat
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12-08-2024, 02:34 PM
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#9
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Established Member
Join Date: Apr 2019
Location: Arlington
Posts: 36
M.O.C. #23884
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City water connection
I had water coming out of my city water also when I was on the pump. The check valve in the connection failed. I put a plug in until I could replace the connection. After replacement everything worked fine. Easy to replace.
__________________
2011 Montana 3580RL 37' Hickory Edition
2012 Ford f-250 King Ranch short bed, 6.7 diesel, SumoSprings, Pullrite slider hitch. Sulastic shackles, 400 amp hour lithium batteries, 500 watts solar, DC to DC charger, 3000 watt full sine wave inverter
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12-08-2024, 05:05 PM
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#10
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Montana Fan
Join Date: Apr 2015
Location: Farmington
Posts: 104
M.O.C. #17288
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With the sytem pressurized by the pump, remove the screen inside the fitting where your hose makes up to. Then using something soft like a pencil eraser, stick it in the hole and press on the small piece inside the fitting. That is the check valve. By pressing on it, you may dislodge some dirt. Oh, and expect to get wet. Remember to put the screen back in. Do not run off city water unless the screen is on.
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