Fresh water vent

[Turlocklineman]

Howdy
I have a 2022 nexus rebel 35r. The fresh water tank is no venting and is collapsing in on itself. I can’t find where the vent tube is. Need some help
Turlock lineman

 

[Rich W.]

It probably doesnt have a tube coming from it - probably just a vacuum relief valve on top of the tank somewhere.

 

[Turlocklineman]

No relief valve on the tank.

 

[Buly]

There must be a vent at the top of the tank. Unless they made mistake and missed installing one?

 

[Rich W.]

Look for one of these:

 

[Turlocklineman]

It’s not there. I filled the tank and water and when it was full water came out an overflow valve and spilled on the ground. I also can’t find a valve to empty the tank.

Thanks Mark

 

[J&JD]

It’s not there. I filled the tank and water and when it was full water came out an overflow valve and spilled on the ground. I also can’t find a valve to empty the tank.

Thanks Mark

Since you have an overflow tube/valve that could possibly also serve as your tank vent unless for some reason there is a one way check valve in the overflow system. No reason for there to be one, however.

 

[Rich W.]

The overflow usually has a “duck-bill” type device on it preventing contamination but also not allowing any venting to equalize pressure in the tank. So if all the system has is an over-flow, and said over-flow has a typical duck-bill thingy on it, then the tank would colapse during normal use absent a vacuum relieve type valve. So……?

 

[TheLooks]

Could it vent thru the fill cap? Like a gas cap does?

 

[SkipCarr]

I know it’s been a while since this post, but I had a similar experience while filling the tank after the rig sat for a few months…I attached the hose to the fill port and came back about 15 minutes later to find the bed above the 75 gallon plastic tank was raised up several inches…. Apparently the rubber vent valve right below the hose fill port was stuck closed trapping air in the tank while filling…I fished a piece of wire down the valve and the trapped air was released… I had to replace a few screws holding the bed in place and luckily had no leaks…..