Weird stuff happens

[robert9999]

Took TT out of storage for 4 months & camped this week. Hooked up everything as usual but noticed the fresh tank filled up with water from the city water line? Overflowing in the am . I shut off water supply & started draining fresh water tank. Grey tank was empty? Went to you tube & found similar issue. Fix was to cut off city water supply, open drain on fresh water tank ,, turn on electric water pump & than run hot water faucets for 10-15 minutes. I actually drained most of the fresh water & ran faucet until air was spitting out. Shut off pump , closed tank drain . Opened city water supply & it fixed itself. All working as usual now. Supposedly there is a valve that gets stuck. Don’t have a clue where it is & or why the fix is what I did , but it works. Anyone know where this valve is located?

[RogerR]

Odds are your backflow preventer valve was stuck open. Running the pump pulled out something or just loosened it up.



Here's a test to see if it is working now. Run the pump. If it stays running or runs occasionally with no draw it is leaking. If it re-fills your fresh water tank it is gone.

[robert9999]

Ran the pump with some water in fresh tank & it held pressure . Pump stopped when faucet was shut so I assume it’s good now. The valve in question is inside the water pump I assume. I have the 4008 shureflo.

[Grumpy]

Originally Posted by robert9999

The valve in question is inside the water pump I assume. I have the 4008 shureflo.

Usually.

[RogerR]

If it occurs again the kit is about 13$ and only a few screws to get it off and new one in.. If you can get access easily. There are youtubes to do it out there.

[robert9999]

Thanks ! I’m going to buy a valve & keep in in my tool box. I have easy access fortunately .

[Screwby]

Seems like it happens after they sit for awhile. My guess is it dries out in there and after running it a few times the water “slicks” everything up again.

[robert9999]

Looks like that would be the cause. Must be a rubber material that hardens up a bit? I looked at a schematic & it looks like simple parts are used. Pump said Hecho in Mexico so maybe Chinese rubber?

[DonaandDon]

Not sure but why not open the fresh water drain valve to remove the water? Why run the pump dry?


Don't believe the tank / suction line / the pump suction strainer with that plastic cap / the pump itself is empty of water. The real wat to ensure antifreeze is in the fresh water is thru the city water fill.