Durable thermoplastic construction for corrosion resistance. Heavy-duty motor with automatic thermal overload protection. Automatic tethered switch designed for minimum 14" diameter sump basin. 1/3 HP Pumps up to 3150 GPH. 1/2 HP pumps up to 3630 GPH. 1-1/4" or 1-1/2" discharge and 8' grounded power cord. Piggy-back style switch for automatic or manual operation. CSA certified.