High quality pumps at an economical price, Johnson's heavy duty bilge pumps are designed to meet demands of recreational or commercial duty. These pumps may be automatically controlled with either an automatic switch AS888, or an electronic float switch, or the Johnson Ultima Switch. Pick one up, and you'll know by the weight that this is a durable pump, built to last. Threaded discharge ports - one each of 1-1/8" abd 1-1/4"; the 4000 pump includes 1-1/2" and 2" ports Check valve standard (removable) Pumps are liquid cooled with double ball bearing motors for extended service life Stainless steel shaft and hardware, tough thermoplastic body "Universal" mounting base fits comparable Rule bases Warranty: 3-years for 1600 & 2200; 1-1/2 years for 4000 Made in USA