Jensenbreck,

There are many reasons this could happen.

First, how much pressure is "too much" pressure?

If you know for a fact the pump is pressurizing as it should and creating compression as it should, but you're not getting pressure in the tank(s), then most likely the problem is either the pump or a large leak.

I would spray soapy water on all of the connections and fittings to find out if there is a leak somewhere. It seems to me there should be a VERY obvious leak if the pump is pressurizing air, but it's (apparently) all bypassing the tank; either that or the tank has a hole in it and needs to be replaced.

First, look for a leak.

Secondly, make sure the in-tank Check Valve is operating properly. I would honestly replace it, as a sticky Check Valve is a very common problem and can cause pressure to backfeed from the tank. Or, remove it from the tank and clean it as there may be debris inside the valve, allowing air to escape.

- MTR