1016070 Ultimax Ultra Jet Spa Pump 12A 230v 2-spd, PUUM2307582FR, 1016070-NHP, PUUMC2307582F

1016070 Ultimax Ultra Jet Spa Pump 230v 2 speed 12 amps. PUUMC2307582FR, with BIG 3.7" outside diameter threaded intake, and 3.0" discharge threads.

Note that this rare model had a BIG 3.7" outside diameter thread on the intake, and a normal 3.1" thread on the discharge.

And if not available, you can use 1016174 with a threaded adapter here:

1016174 and Thread Adapter

Balboa ships this sometimes with a mounting base with 4 slots, and sometimes with 6 slots, depending on their motor availability. And US Motors or Century motors, either are equal and used by Balboa.

12.0A replacement spa pump, Ultimax-56 56 Frame motor rated 12.0 amps 230V 2-spd, 2.5"/2" Side Discharge Spa Pump,

Single split-capacitor design, not dual capacitor. Popular as Cal Spas pump, MAAX, Coleman Spas, and many others. May be marked BHP 4.0, Ultimax-56

A Balboa water Group product.