Submersible motor and pump control boxes from Grainger feature prepunched holes for pole or wall mounting indoors or out. Use single-phase submersible models for water systems that utilize a pressure switch and safety relief valve. Capacitor-start, induction-run (CSIR) models feature quick-disconnect relays. Capacitor-start, capacitor-run (CSCR) models can provide greater electrical efficiency and longer pump life. Also find 3-phase models to help prevent overload. Shop Grainger for pump control boxes!