Pressure Tank Installation Tee Packages - Aqua Science Tank Tee Packages in Brass or Stainless Steel are designed to connect your pressure tank to your water line. Each package comes with a tank tee, full port ball valve, check valve, hose bib, 100 PSI pressure relief valve, male adapter (to connect to your incoming well line), pressure gauge, and a Square-D pressure switch with a choice of pressure settings.