Valves Seeping... They are new....

This is a new install.... When I air up my tank both of my drivers side bags air up with the tank. When I have all of the bags aired up and drain my tank all of the air seeps back out of all of my bags as the tank pressure drops. What is the problem this never happened before I relocated my front dump vavles to the tank along with the others.

I am running 8 electric Black Max valves. The valves have been taken apart to install/check them 5 times each no debris is in the vavle body or under the diaphram. I am really at a loss here. Any suggestions would be appreciated. Would it hurt anything is I put a light coat of silicon grease around the diaphrams to help them seal better? LMK

when the tank looses pressure all ur up valves will leak back to the tank

GET CHECK VALVES

you can use a set of these check valves from suicidedoors they wont let the air go back into the tank

OK so what do I do about the vavles seeping air into my bags????

did you instal the valves right? they work one way usualy. Like it was said they will leak if the air preasure is less in the tank, they will fill the bag if the direction is wrong with the same idea. the valves i got are marked witch direction the air flow should be.

OK Mike you win a cookie lmao... If you happen to run across me at a show this year a beer if ya want. The valve that is seeping to the bag is in fact installed backwards on the tank lol. Thanks guys for all the help!