How much water is to much?

[fsrmike]

We never had this problem with the Jay Flight we had for 9 years. In fact that we never had any issues.
I believe that the issues we are having with our new rig is do lack of quality control.
Jayco needs to step up and take control of their products.

[Higgy]

Capping them is a good idea as long as you remember to uncap when you get to your destination. If you forget to uncap i could imagine you will collapse the tank if the air cant replace the water you are using. (if the pump is strong enough to keep sucking)
As far as siphoning the water through the vent tubes. If you are able to siphon the water out, then the vent tube is going in too deep into the tank. It should be connected right at the top so not able to siphon.
I was thinking of using those little air bed plugs or old beach ball stoppers.

[Filthy-Beast]

Originally Posted by SECDuke

We have the 2013 HT27.5BHS. In our first few months of camping I never could figure out why my fresh water would not enter as if it had no vents at all. This is the first unit I have had that gave any problems like this. We had to park it for the last year due to sickness in the family but will start back very soon. I did not check the vents but will. It doesn't sound like this a common problem.

Others have reported the tube from the fill hole to the tank is too long and gets bent and crimped, see if you can inspect for that.

[rick danger]

Originally Posted by rryman

I'm reluctant to put valves on the overflow lines or plug them for fear I won't remember to open them up when filling or using water from the tank.

Why couldnt you just put a check valve on them?

[Higgy]

Originally Posted by rick danger

Why couldnt you just put a check valve on them?

if you put a spring or swing type check valve on it would have difficulty sucking air back in through the tube once loaded with water behind it. Also, you would have difficulty putting water into the tank if it couldn't breath properly.

[rick danger]

Yeah, maybe. But with people talking about collapsing the tank, I think the check valves would open first. That said, I bought two yesterday but I dont think I'll use them. I may just cap the lines and make sure I remember to uncap them before using the water. And its only with a full tank. I can see sloshing but I dont see why you would get any siphon effect. Why would they run the overflow/vent lines down into the tank far enough to siphon?

[33 RLDS]

There is also a vent on mine at the filler so I am not too worried about collapsing a tank. Its not space shuttle technology, just poor Jayco design.