Made in 1, 1.5, and 2 HP 48 frame versions.
Pool applications had strainer housing baskets attached, but not in spas. Parts sold separately - inquire for complete wet ends.
Two impeller versions were utilized, background type (#4) is '1580C' and only available in 1.5 HP without wear ring.
Other versions do need wear ring (#8). Threaded pump union end are 1.5 MPT female (inside) threads, and outside threads are Hayward Specific 1-1/2" male.