This pulsator is a great replacement for Bou-Matic pulsator and works on any existing Bou-Matic controller. The pulsators mounts using a 1/2" threaded base. These pulsators can also be ran on almost any 24V controller such as Bou-Matic, Surge, Westfalia, Universal. Making them a great replacement for almost any system. All parts Available.