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Old 07-23-2019, 03:58 PM   #1
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Brand: Thor Motor Coach
State: Wisconsin
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THOR #16098
Water flowing from city water inlet

We just bought a new 2019 Thor Windsport 29. Getting ready to go on a road trip and found that when we are using the freshwater tank with the water pump the water continually pumps out of the city water inlet. Any help is much appreciated. We temporarily put on a small hose extension with a shut off switch to stop the flow of water.
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Old 07-23-2019, 04:13 PM   #2
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Brand: Thor Motor Coach
Model: Chateau 35SF
State: Missouri
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THOR #2020
The city water connection is supposed to have a check valve that keeps the water from back flowing. If you remove the hose washer / screen combo you should be able to see it. Possible that it is broken or something holding it open.
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Old 07-23-2019, 05:23 PM   #3
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Brand: Thor Motor Coach
Model: 2015 Vegas 24.1
State: Pennsylvania
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THOR #2601
pstandiford is right. When you take off the cap on the city water connection, look inside and you should see a washer with a debris screen imbedded in it. That screen serves two purposes. It blocks debris. But it also depresses a check valve in the city water connection on the RV when the connection is tightened on the hose. The screen pushes the check valve open to allow city water to flow into the RV. When the city water hose is disconnected, the check valve closes so that water doesn't flow out the city water connection when you run the RV water pump using the fresh water tank.

Your check valve in the city water connection is probably stuck open.
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city water connection, fresh water tank, water, water pump

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