Hi lmurphy. Haven't seen much of you and Lydia on the forum for awhile.
I don't remember whether you have one of the new Montanas with the connection center and the switch Tim mentioned or one of the older Montanas. If an older one, the anti-siphon valve is at the connection, just under the screen. It has a white pin. If the o-ring in the valve gets out of place it can keep the valve from functioning correctly. When the o-ring in ours got out of place it was because I didn't push the pin when winterizing to release the water under pressure. The water froze, forcing the o-ring out of place. I managed to work the o-ring back into place although it wasn't much fun.
See another Montana or Mountaineer on the road? Flash lights twice, it might be one of us!
Steve Reigle (pronounced Regal)
Fulltiming since 3/21/03
'05 Ford F250 SD Lariat CC SB 6.0L PSD/TS FX4 4x4
Our RV Travels (now Firefox-compatible)