Doesnt build up pressure.

So I just picked up a Viair 450C and installed it today. When I turn it on it doesnt seem to build up any pressure in the tank at all and just continues to run. I checked the system for leaks and I cant seem to find any. So I am wondering what this could possibly be.

Is the check valve on the leader hose facing the correct direction?

Pretty sure it was when i installed it. But ill check tomorrow.

Took the check valve out and I found out that it was all junked up inside and wasnt allowing any air through. So I cleaned it out and they work perfect now.

Good deal.