Well I finally took off the check valve like Mep1 told me to and I am going to see what the ramifications are going to be. Greg told me that the system is supposed to have a check valve and for the air to blow down (for cold weather). The problem could be that the system will allow air to travel into the holding tank? Who knows but I bet this is going to fix my problem.
(The problem is the pre-soak occasionally does not work out on the gantry. The outgoing hose builds up pressure which does not allow the pump to pump out liquid.)