feature fully 2" inlet/outlet hot tub,2"inlet/outlet pump is capable of handling roughly twice the water of 11/2" inlet/outlet pump. Pump housing,pump cover & impeller are madeof high reinforce plastic.Mechanical seal,with single phasemotor,thermal overload protector & pneumatic control are economicalquiet and compact pump, they self-drain water from bathtub after eachuse for fresh water,It is most suitable for spa / swim spa / hot tub.