Water tank issue

[jarata1]

I want camping this weekend to a state park no water or electricity.
I filled up my water tank at home and used the pump for the water when I was at campsite.
The odd thing is everytime I turned on water with the pump, water would shoot out my water supply hose fill outlet that i use when camping at a campground with water supply.
Something is wrong it shouldnt shoot out the other side of camper.Is something hooked up wrong.
I also notice when im at a private campground and use there water supply I seem to have alot more gray water waste then I remember using.
When i bought trailer in for service I had them bypass the hot water heater because it wasnt working right and i didnt really need it in summer.Could they have done something wrong
Thanks

[Dick_B]

If you can't fix it just plug it when you want to use the pump. It's probably illegal (the check valve is there for a reason) but I won't tell.

[RedRocket204]

I would say go for it as it looks fairly simple to do and you could save some money in the process.

[jarata1]

so you think even a non handy guy could fix this

[Calicajun]

RedRocket204 wrote:
Probably do not need to replace it, only "adjust" or repair.

Repairing the city water check valve

Nice write up, thanks for the link.

[RedRocket204]

Probably do not need to replace it, only "adjust" or repair.

Repairing the city water check valve

[Bobbo]

Water is shooting out of the shore water inlet because the back check valve has failed. Easy replacement.

Increased grey water waste is probably usage.

I doubt seriously that the water heater being bypassed has anything to do with either issue.