Hey guys. My rear drivers side dump valve is stuck open. YOu can hear the air slowing coming out of it. Here is the kicker. I have 8' of line attached to the dump, i stick my thumb over it and it stops the flow. I let it go and it all dumps out. Not slow like first. I took it apart and nothing is there. So come on bag doctors prescribe me some new valves, I have the mac daddy's. They are 1/2" e-air mac daddy's 450s i believe. Thanks for the help.