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02-04-2024, 11:04 AM
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#1
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New Member
Join Date: Feb 2024
Location: South Carolina
Posts: 1
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Thor Sequence 20K water issue
When we hooked to city water, it fills the holding tank and overflows
So we can only use the pump and the tank does anyone know what we might can do on the road to fix this this is a brand new RV and I don’t really trust many of the sales centers to fix problems. I was just wondering if anyone else had this problem
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02-05-2024, 05:09 PM
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#2
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Platinum Member
Join Date: Jan 2012
Location: Smyrna, TN
Posts: 576
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If the freshwater tank, then you have a problem with your water pump backflow valve. This valve stops city water from flowing into your fresh storage tank. Either a piece of plastic has lodged the valve open, or the valve has failed. Go to a rv repair place if you cannot do the repair yourself. Try to lookup the location of your 12v water pump to see if you can get to it. If the RV is new, then your warranty should cover this problem.
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02-05-2024, 05:54 PM
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#3
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Platinum Member
Join Date: Dec 2020
Location: Washington
Posts: 254
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Using either the water fill or the city water connection produce the same result? Have you confirmed that?
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02-06-2024, 02:39 PM
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#4
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Platinum Member
Join Date: Feb 2015
Location: Chaska MN
Posts: 1,711
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In my past RVs, there was always a switch that needed to turned to stop the city fill from filling the fresh. Since mine were all in different places, your manual should tell you where it is. If there is no manual, try a youtube sales walkthrough... they might cover it.
__________________
2021 Promaster 1500 118wb conversion
2019 Roadtrek Simplicity SRT (almost a Zion)
2015 Roadtrek 170
2011 LTV Libero
2004 GWV Classic Supreme
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02-06-2024, 05:57 PM
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#5
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Platinum Member
Join Date: Feb 2016
Location: Portland, Oregon
Posts: 3,142
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Quote:
Originally Posted by mumkin
In my past RVs, there was always a switch that needed to turned to stop the city fill from filling the fresh. Since mine were all in different places, your manual should tell you where it is. If there is no manual, try a youtube sales walkthrough... they might cover it.
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I second that, in my DIY build I have a solenoid water valve to prevent auto fill. Look for a switch.
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02-08-2024, 07:47 PM
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#6
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Bronze Member
Join Date: Feb 2016
Location: Ontario
Posts: 32
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I worked on a friend RV with similar problem and the culprit was the water pump itself (culprit is the diaphragm..). Installed a new pump and problem solved...! bought a "generic" pump on Amazon and took us less than 15 min to replaced. It has been over one year and all still working fine. As your RV is new, it may be still on warranty (Most pump are one year warranty...!). Hope this helps, cheers,
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02-08-2024, 08:22 PM
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#7
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New Member
Join Date: Oct 2019
Location: Washington
Posts: 1
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I had the same issue. The former owner didn’t winterize the rig, causing a hairline crack in the water pump housing resulting in city water back flowing into the fresh water tank. I purchased a new water pump housing from amazon ($21.50 in 201 , exchanged the pump motor onto the new pump housing and all was good.
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02-08-2024, 09:09 PM
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#8
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Platinum Member
Join Date: Jan 2020
Location: Salida
Posts: 159
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Quote:
Originally Posted by mloganusda
If the freshwater tank, then you have a problem with your water pump backflow valve. This valve stops city water from flowing into your fresh storage tank. Either a piece of plastic has lodged the valve open, or the valve has failed. Go to a rv repair place if you cannot do the repair yourself. Try to lookup the location of your 12v water pump to see if you can get to it. If the RV is new, then your warranty should cover this problem.
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This is the correct answer. There is no switch or solenoid on Thor B vans. There are two check valves, one in the water pump and one at the city fill input connection.
Until you get it fixed, just use the tank and water pump. We almost never use city fill on our 2020 20AT.
Happy trails.
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02-09-2024, 03:22 PM
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#9
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Platinum Member
Join Date: Mar 2018
Location: Tinley Park IL
Posts: 348
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JMO, but I'll never understand why anyone would hook up to city water in a Class B. Fill the fresh water tank, keeps water fresh, easy to come and go with your vehicle, water pressure regulators can fail and ruin an RV. If there's a leak, you'll hear the pump running. Flip a switch if you go for a walk or whatever. The list goes on.
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02-09-2024, 03:35 PM
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#10
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Site Team
Join Date: Jul 2013
Posts: 5,340
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Quote:
Originally Posted by ChicagoTom
JMO, but I'll never understand why anyone would hook up to city water in a Class B. Fill the fresh water tank, keeps water fresh, easy to come and go with your vehicle, water pressure regulators can fail and ruin an RV. If there's a leak, you'll hear the pump running. Flip a switch if you go for a walk or whatever. The list goes on.
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I agree.
However, note that the same configuration that is used for city water is also necessary to properly blow out the system during winterization.
So, unless you are one of those who believe in putting that pink stuff in their system, having a functional city-water system is still important.
__________________
Now: 2022 Fully-custom buildout (Ford Transit EcoBoost AWD)
Formerly: 2005 Airstream Interstate (Sprinter 2500 T1N)
2014 Great West Vans Legend SE (Sprinter 3500 NCV3 I4)
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