I found a back pressure valve at a RV Sales place, and replaced the old one. Looked inside and a rubber O-ring was shot. Like all who gave advice on this subject it was an easy fix. Thanks to all, this is a great forum.
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06 MS 36TK3 #2473 w/(Phase II)side to side levelers, Trailair pin box w/Tri-Glide plate.
2011 Dodge 3500 CC 4x4 Diesel DRW Power Tuner guages etc
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