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Old 06-14-2015, 06:17 PM   #1
Join Date: Apr 2015
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White drainage hose question

Was empyting my fresh tank from the valve under the trailer and noticed a second white hose next to it. No valve on this one. Just a hose cut at a 45 degree angel next to the drain valve. Any idea what the is?


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Old 06-14-2015, 06:18 PM   #2
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Fresh water tank vent/overflow

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Old 06-14-2015, 06:27 PM   #3
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Originally Posted by ptylerp View Post
Fresh water tank vent/overflow
what he said
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Old 06-14-2015, 06:35 PM   #4
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Excellent. Thank you.
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Old 06-14-2015, 06:36 PM   #5
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+2. The only other thing I'll add here is this: as you observed, it doesn't have a valve, it's just an open hose that overflow drains the FW tank when it gets too full and allows air into the tank as you use water (so you don't create a vacuum inside the tank and possibly collapse the tank in on itself.) But what I found (both with my previous camper and my current one) is that when I would fill up my FW tank at home and then head out on the "up and down, up and down" interstates around here--by the time I got to where I was camping, I would often have lost a third of the water in the tank out the vent (like, it said "full" when I left home and said "2/3" when I got where I was going.) So I added a valve on the vent/overflow hose as well to keep the water in. You just have to remember to open it when you get where you're going.
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Old 06-15-2015, 12:27 PM   #6
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Great advice - thank you!!

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