Hello. I have a water treatment system by rainsoft, and a galv pressure tank with 1/2 hp deep well jet pump. Off of the pump it tees to both the galy. pressure tank and 250-300gal tank from the rainsoft system which is where the water actualy feeds to the house from not from the galv tank. My question is do i need the pressure tank? Because when i have the ball valve open on the galv tank to let water flow into it,, the pump runs for quite a long time if not constant. When its off and the water only flows to the rainsoft system the pump seems to operate fine. THanks for the response.