• connects the water line from the pump to the pressure tank. • all three connections are dual. • connects the water line from the pump to the pressure tank. A pressure tank functions as a water reserve in instances of power outages and other emergencies. Pressure tanks, known as well tanks, also protect and extend. Webwell pressure tank solutions. If you're disappointed with the water pressure in your kitchen or bathroom, it may be time to install a water pressure tank or well pressure tank to.
