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Danford50

North Carolina

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Posted: 10/20/21 01:57pm Link  |  Quote  |  Print  |  Notify Moderator

i have a 2016 catalina floor plan number is fs223. when i am connected to city water at the park, it fills my fresh water tank, where do i need to start to look for what is causing this too happen?

Gdetrailer

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Posted: 10/20/21 02:15pm Link  |  Quote  |  Print  |  Notify Moderator

Do you have a separate outside manual water fill?

If not, for RVs without the outside manual water fill they use a manual valve inside the RV to fill the water tank. That valve may be open slightly allowing water to slowly fill the tank.

If you do have outside manual water fill, the only way water can get into the fresh water tank is if the 12V water pump check valve fails..

In this case you need to check the hose on the input side of the pump (which goes to the freshwater tank) and see if there is water coming out of the input side of the pump with the city water pressurized.

If water pump check valve has failed, you might be able to get a rebuild kit or if you can't find parts you will need to buy a new water pump..

If you don't use freshwater tank at all and have no intentions to ever use it, you could add a manual shutoff valve on the output side of pump and simply turn off the valve.

mobeewan

Hampton, Va

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Posted: 10/20/21 04:31pm Link  |  Quote  |  Print  |  Notify Moderator

Doesn't matter what type of fresh water tank fill system that you have for your trailer, water can still leak past the pump internal check valve, filling the tank.

Second Chance

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Posted: 10/21/21 07:41am Link  |  Quote  |  Print  |  Notify Moderator

mobeewan wrote:

Doesn't matter what type of fresh water tank fill system that you have for your trailer, water can still leak past the pump internal check valve, filling the tank.


Not quite true. With our system, when all the valves are set for city water the pump is out of the system.

Rob


U.S. Army retired
2020 Solitude 310GK-R
MORryde IS, disc brakes, solar, DP windows
(Previously in a Reflection 337RLS)
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Full-time since 8/2015


Danford50

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Posted: 10/21/21 05:04pm Link  |  Quote  |  Print  |  Notify Moderator

Second Chance wrote:

mobeewan wrote:

Doesn't matter what type of fresh water tank fill system that you have for your trailer, water can still leak past the pump internal check valve, filling the tank.


Not quite true. With our system, when all the valves are set for city water the pump is out of the system.

Rob

i have had travel trailer before, 2 to be exact and every time i connected to the city water connection , it never filled my fresh water tank.

Danford50

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Posted: 10/21/21 05:07pm Link  |  Quote  |  Print  |  Notify Moderator

Gdetrailer wrote:

Do you have a separate outside manual water fill?

If not, for RVs without the outside manual water fill they use a manual valve inside the RV to fill the water tank. That valve may be open slightly allowing water to slowly fill the tank.

If you do have outside manual water fill, the only way water can get into the fresh water tank is if the 12V water pump check valve fails..

In this case you need to check the hose on the input side of the pump (which goes to the freshwater tank) and see if there is water coming out of the input side of the pump with the city water pressurized.

If water pump check valve has failed, you might be able to get a rebuild kit or if you can't find parts you will need to buy a new water pump..

If you don't use freshwater tank at all and have no intentions to ever use it, you could add a manual shutoff valve on the output side of pump and simply turn off the valve.


On my trailer i have a Manuel freshwater with a cap, and a city water(screw type) connection. not following what you are trying to say here

Gdetrailer

PA

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Posted: 10/22/21 09:16am Link  |  Quote  |  Print  |  Notify Moderator

Danford50 wrote:

Gdetrailer wrote:

Do you have a separate outside manual water fill?

If not, for RVs without the outside manual water fill they use a manual valve inside the RV to fill the water tank. That valve may be open slightly allowing water to slowly fill the tank.

If you do have outside manual water fill, the only way water can get into the fresh water tank is if the 12V water pump check valve fails..

In this case you need to check the hose on the input side of the pump (which goes to the freshwater tank) and see if there is water coming out of the input side of the pump with the city water pressurized.

If water pump check valve has failed, you might be able to get a rebuild kit or if you can't find parts you will need to buy a new water pump..

If you don't use freshwater tank at all and have no intentions to ever use it, you could add a manual shutoff valve on the output side of pump and simply turn off the valve.


On my trailer i have a Manuel freshwater with a cap, and a city water(screw type) connection. not following what you are trying to say here


Some RVs instead of having a gravity outside water fill will have a water fill valve inside the RV which allows you to open the valve with city water connected to fill the tank directly.

Since you have the outside gravity fill, you obviously do not have the internal water fill valve.

This means that your water pump has a bad check valve and is leaking water into the tank. That is the only way water can fill your tank without using the outside gravity fill.

You need to repair the pump or buy a new pump. Some pumps there may be a repair kit.

If you have no plans of using the fresh water tank, you could add a valve at the water pump and turn the valve off.

mobeewan

Hampton, Va

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Posted: 10/22/21 09:59am Link  |  Quote  |  Print  |  Notify Moderator

Second Chance wrote:

mobeewan wrote:

Doesn't matter what type of fresh water tank fill system that you have for your trailer, water can still leak past the pump internal check valve, filling the tank.


Not quite true. With our system, when all the valves are set for city water the pump is out of the system.

Rob


Do you actually have an extra valve that you shut off between the pump and the line from the city water inlet?

Danford50

North Carolina

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Posted: 10/23/21 08:30am Link  |  Quote  |  Print  |  Notify Moderator

mobeewan wrote:

Second Chance wrote:

mobeewan wrote:

Doesn't matter what type of fresh water tank fill system that you have for your trailer, water can still leak past the pump internal check valve, filling the tank.


Not quite true. With our system, when all the valves are set for city water the pump is out of the system.

Rob


Do you actually have an extra valve that you shut off between the pump and the line from the city water inlet?

No extra value on the inside

CharlesinGA

South of Atlanta, Georgia

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Posted: 10/25/21 11:22pm Link  |  Quote  |  Print  |  Notify Moderator

Common everyday question asked on every RV forum it seems. Yes, most likely the check valve in the electric pump.

1) remove city water hose.
2) run pump extensively cycling faucets on and off.
3) turn pump OFF
4) reconnect city water hose and DO NOT touch the pump switch with city water connected.
5) wait a while and see if your problem is cured. This process usually clears the check valve of debris and reseats the check valve.

https://youtu.be/B_yI_tDcOxY

Charles


'03 Ram 2500 CTD, 5.9HO six speed std cab long bed Leer top and 2008 Bigfoot 25B21RB.. previously 2008 Thor/Dutchman Freedom Spirit 180. SOLD - 2007 Winnebago View 23H Motorhome.

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