Has anyone added on a check-valve to a WATER ACE jet tank system to achieve increased water pressure from city water?

We have the pump hooked up, but the pump is working too often because our pressure if 50 lbs but city is 30. The pump is trying to offset the 30 going back, so we thought a checkvalve might stop this.

Any ideas or anyone that has done this successfully?

thx!

jz