The Wayne submersible sump pump can move up to 3900 gallon per hour (GPH). Tested to 1 million cycles; For performance that lasts, Wayne Pumps exceeds an average life of 1 million cycles. Durable epoxy-coated and reinforced thermoplastic construction, for long life in tough sump applications. Integrated vertical float switch with solid, leak free polypropylene float for automatic operation; 9 in. On level and 4 in. Off level. No need for weep holes; unique top suction design reduces clogging and prevents air lock condition. Designed with Premium John Crane carbon/ceramic shaft seals for quality that lasts.