Fresh water tank piping identification

[Dwain53]

We have a 2021 Eagle RSTS and have been reading posts about the possibility of losing water from the fresh tank through the vent while in transport. AS I look beneath the fresh tank there are 3 lines exiting the bottom of the camper. I know the one with the shut off valve is the tank drain. There is another 1/2” braided line and a 1 3/8” corrugated line with a rubber boot on the end. Does anyone know which is the tank vent and the purpose of the other hose? I was thinking the vent lie was the 1/2” line but the only water I have seen exit has been from the corrugated line when filling the tank full.

[madmaxmutt]

https://r.tapatalk.com/shareLink/top...ink_source=app

[madmaxmutt]

The "vent" is the 1/2" tubing. The " overflow" is 1 3/8". Either will technically do either job. The 1 3/8 tube is pretty much a dump if you stop or park on a downslope.

[Dwain53]

Thanks for the info. Am planning to put a valve on the overflow that can be closed during travel. I don’t normally travel with the tank full but am boondocking this weekend.