I have a valve question... Possibly a problem

[95PGHB]

I have a question....

I run 1/2" blitz valves... When I air up the rear the dump valves let out a short burst of air... the front ones dont do it only the rear... I have the valves mounted directly to the tank...

Has anyone every had this happen or know how to make it stop...

Thanks in advance for the help!!
-Chris

[Twisted Minis]

I've had this issue with tank mounted valves. I have found that it sometimes has to do with backpressure on the valve. Since it is so close there is a lot of pressure coming at it fast, and it can sometimes open the other valve. I have fixed this by putting a plug in the end of the valve with a smaller hole in it.

[slammed97]

i have th esame issue but its front and rear and my valves arent on the tank...i think they just used cheap valves on my truck....

[estetic]

the diaphrams in the valves rely on positive pressure to fully seal, when you have 0 psi in the rear bags the dump valves have no pressure keeping them closed. When you open up the fill valves there is a split second where the dumps are not fully seated/sealed (due to the lack of pressure) this allows a bit of air to escape until the diaphram fully seats.

[95PGHB]

Well mine does it any time I air up... even when there is air in the rear bags... I just wanted to make sure that there wasnt a problem... I knew that they relied on the pressure to keep them sealed but did know if that was normal... I kinda wanted to run some 3/8 line out of the dumps down under the bed... Maybe that will solve the problem...

Thanks for the help fellas!!!

[HUHJake]

what kind of switch box do you have/what switch are you hitting to do that? It may have a short somewhere

[95PGHB]

Its just a regular 10 switch box... it does it no matter what switch i hit... I did notice tonite while I was messin with it that if the air pressure in the tanks is low they dont do it... I think TM is prolly right...