B Series and GRT Series gravity return pump tanks come standard with automatic seal venting and flush and internal overload protection on single-phase motors. They are available in one- or two-pump configurations. Standard features also include brass inlet strainer through 3 hp that protects pump from foreign materials. The cast iron bronze-fitted pumps with ceramic seals are rated for operation up to 250F (122C). Low-level pump protection is provided by an adjustable float switch with stainless steel float and rod; includes a double-break silver-to-silver contacts.