Valterra 3 Piece Gate Valve [1 1 2"MPT x 1 1 2"Union] [45 PSI] (6124) leviton Improves repair efficiency and long term Improves repair efficiency and long term timer performance 5 kW PS electronic heater is designed for compatible heating applications where a 240 volt L shape heater with a long cord and clamp supported installation is required The Valterra 3 piece gate valve is designed for compatible 1 1 2 inch systems where a male pipe thread connection on one side and a union connection on the other make long term maintenance easier This model is especially useful in installations where the plumbing layout already favors a removable union on one end rather than a permanently glued connection on both sides