I thought it was that also, but Surburban said there is no check valve. It is no easy to get at if there is one. I think I need to pull the tank out.
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Bob and Kate Weigant
Welches Oregon
Elite 2006 36TK3
2007 M2 Freightliner
2005 Wrangler
In a land of the blind, the one eyed guy is king.
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