The Goulds V60 HydroPro pressure tank comes with a heavy-duty butyl rubber diaphragm which helps separate air from water while maintaining the air charge for optimal pressure tank performance. An inner shell is included to prevent the diaphragm from expanding. Most of the top-rated well pressure tanks are quite energy-efficient https://best-well-pressure-tank03567.wikistatement.com/2543336/5_wesentliche_elemente_für_best_well_pressure_tank