The Clack V3007-15 connector kit is used to plumb any system using the Clack WS1 control valve. The kit is comprised of two 90-degree elbows made from industrial-strength plastic. The elbows terminate in John Guest 3/4" Quick Connect fittings that will receive 3/4" copper, PEX, or CPVC. Simply insert the cut and cleaned end of the pipe into the fitting and twist the collar to secure it. These fittings combine the best of both worlds: 90-degree to allow a tight-to-the-wall installation and quick-connects for fast and easy connection. The V3007-15 connector kit is our best seller for these reasons.