Welcome to Dr. Björn's Auto!
This Tee is needed if you want to use the city water hook up with an electric faucet other than the original Westfalia Faucet. It has an integrated check valve and allows you to connect a pressurized water hose to the city water hook up inlet without overfilling the on board storage tank. An adapter fitting is also included for easy connection of the inlet hose to the tee.
Use this kit if you want to use the city water hookup with a Shurflow or similar faucet.