Water Back-flow Into The Fresh Water Tank

mobeewan wrote:
Some times there are pieces of plastic that wind up inside the fresh water tank when they drill the holes for the tank fittings. You might also get dirt running down the sides of the trailer that washes into the tank filler hose if you have a tank fill opening that doesn't have a cap but relies only on a hatch that flips up and down to cover the opening.

You should have a strainer on the inlet side if the pump. It will have a fine stainless steel mesh screen. It catches any dirt, trash or particals from the fresh water tank that can cause problems with the pump or faucets. If you don't have one you should install one.

Shulflo RV pump strainers

I changed out the fill opening on my trailer to one with a cap behind a locking door. I did it for 2 reasons. First because I had dirt residue in the fill hose and second because when I had a dealer inspect and reseal the roof corners I also had them wash and wax the trailer. They used a spray on wax. Not only did I have dirt in the fill tube, I wound up with a pinkish colored wax inside the fill tube and probably inside the tank.

Thanks for the information.

The water pump in the FR Sunseeker 3050S is in an outside compartment and you have to remove all the plastic panels to get to is, so it is no easy job to clean or replace the WP filter, (need warmer weather).

I will look into covering the fill spout for the fresh water tank.

Some times there are pieces of plastic that wind up inside the fresh water tank when they drill the holes for the tank fittings. You might also get dirt running down the sides of the trailer that washes into the tank filler hose if you have a tank fill opening that doesn't have a cap but relies only on a hatch that flips up and down to cover the opening.

You should have a strainer on the inlet side if the pump. It will have a fine stainless steel mesh screen. It catches any dirt, trash or particals from the fresh water tank that can cause problems with the pump or faucets. If you don't have one you should install one.

Shulflo RV pump strainers

I changed out the fill opening on my trailer to one with a cap behind a locking door. I did it for 2 reasons. First because I had dirt residue in the fill hose and second because when I had a dealer inspect and reseal the roof corners I also had them wash and wax the trailer. They used a spray on wax. Not only did I have dirt in the fill tube, I wound up with a pinkish colored wax inside the fill tube and probably inside the tank.

Old-Biscuit wrote:
How do you normally fill fresh water tank?
Gravity fill port where you stick a hose in
OR
Via swapping a valve/switch to "FILL"

"FILL" valve...could be leaking thru

Water pump has an internal 'check valve' (diaphragm) that can not fully close due to construction debris or even scaling from water

When fresh water tank fills......turn off city water suppy...tuen pump ON and use the water in fresh water tank.
Using the pump water flows the correct direction thru pump and can clear up/clean the 'check valve' so it closes.

Fact is....only use the pump/fresh water tank---just fill fresh water tank as needed.

I fill from an outside port with a hose.

So, even though I have an internal water filter, (which is ahead of the pump), it would be a good idea to have a filter in the incoming water line to filter out the particulate from the RV Park water?

There was just a long posting about this same problem. If you put a new pump in and it’s still doing it sounds like it’s not the pump. Check other valves.

How do you normally fill fresh water tank?
Gravity fill port where you stick a hose in
OR
Via swapping a valve/switch to "FILL"

"FILL" valve...could be leaking thru


Water pump has an internal 'check valve' (diaphragm) that can not fully close due to construction debris or even scaling from water

When fresh water tank fills......turn off city water suppy...tuen pump ON and use the water in fresh water tank.
Using the pump water flows the correct direction thru pump and can clear up/clean the 'check valve' so it closes.


Fact is....only use the pump/fresh water tank---just fill fresh water tank as needed.