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Old 07-05-2009, 08:39 PM   #1
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1978 31' Sovereign
celina , Ohio
Join Date: Jul 2009
Posts: 1
Rivet '78 Int'l - fresh tank drain valve

Can someone tell me where I can find my drain valve for my fresh water tank on my 1978 airstream international?

Thanks in advance

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Old 07-07-2009, 04:55 PM   #2
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1975 29' Ambassador
Reno , Nevada
Join Date: May 2003
Posts: 1,351
I can't find one, either, so far. On a '76 it is a plug underneath the trailer. On a '75 it is a valve on the inside. But the '78 seems a mystery, so far. Maybe it is somewhere behind the bed where the fill is.

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Old 07-07-2009, 05:12 PM   #3
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1978 28' Ambassador
Kenton , Ohio
Join Date: Mar 2002
Posts: 455
I don't have one on my 1978 Ambassador. I have a flap underneath on the belly pan that comes off and exposes the bottom of the tank. I think that is where the valve should go but there is no valve. I drain my tank by running the water out a faucet.
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Old 07-21-2009, 10:09 AM   #4
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1978 31' Sovereign
Mukwonago , Wisconsin
Join Date: Jun 2009
Posts: 5
I have the same unit. There is a small cover underneath the trailer directly below the filler inlet. There is a drain tube ( 1/2') passing through it. Behind that there should be a plug that requires a 5/8 hex allen to remove it. The plug is plastic and is 1 1/2 '' pipe thread. At least that is how it is on a 31' center bath. Good Luck
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