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Old 03-13-2018, 09:41 PM   #1
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265rks water tank question

The last time I used the 5er my water worked perfectly . It still does when hooked up to a city connection but when I fill the tank the water comes out of the two over flow tubes and completely drains itself . It didn't do this in Nov when used last . What could cause it to do this ? TIA J
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Old 03-15-2018, 06:50 AM   #2
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Make sure your low point drains are closed and the tank drain is closed. Maybe the valve is not working right... Just throwing it out there.....
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Old 03-15-2018, 08:56 AM   #3
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It sounds more like the water tank valve is open. If the low point drains are open they would drain water on either city water connection or from FWT since the water lines would be under pressure either way.
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Old 03-15-2018, 09:08 AM   #4
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Are you saying the water drains completely while you drive or will sitting still?

Could it be the tank is actually full and the gauge is just not reading the water level correctly?
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Old 03-15-2018, 09:15 AM   #5
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Make sure your low point drains are closed and the tank drain is closed. Maybe the valve is not working right... Just throwing it out there.....
I only have one drain and it is closed . The water comes out of the two overflow tubes .


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Are you saying the water drains completely while you drive or will sitting still?

It drains as I fill it . This is strange as I have done nothing to it since Thanksgiving except put new vinyl floor down .

Could it be the tank is actually full and the gauge is just not reading the water level correctly?
No it is actually empty .

Thanks for all the reply's.
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Old 03-15-2018, 10:46 AM   #6
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I've heard of water tanks that draw down the water level to about 1/2 or 2/3, but not completely empty. The draw down I had on mine was caused by a siphon like process between the air intake and the water overflow. Jayco approved a fix for this that my dealer performed. So far that's working well.

But again, it never drained the tank (and shouldn't be able to since both these ports on on the upper side of the tank).
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Old 03-15-2018, 10:50 AM   #7
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Why would they put two overflow tubes on a fresh tank? Sounds like you're confusing two non fresh tank tubes. You sure you're not confusing the low point drains for fresh tank overflow.
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Old 03-15-2018, 10:53 AM   #8
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Why would they put two overflow tubes on a fresh tank? Sounds like you're confusing two non fresh tank tubes. You sure you're not confusing the low point drains for fresh tank overflow.
One tube is for air-intake (allow air out of tank as you fill and allow air into the tank as you drain) and the other is for water overflow.
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Old 03-15-2018, 11:25 AM   #9
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Never heard of that. Most I've seen have one tube for overflow. Whether it's water or air it escapes out the one tube. How would the air know which tube to go out?
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Old 03-15-2018, 03:32 PM   #10
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Yes it's a mystery TO ME . I BOUGHT THIS WAY OVER BOOK CAUSE I THOUGHT IT WAS A DEAL NOW I'm IN IOT TOO MUCH TO QUIT . Ooops , sorry about the caps . I'm at a loss .
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