replacement for 1016174 10-16-174 Ultimax^TM 56 Hot Tub Pump, 2 Speed, 4HP 6HP, ENERGY EFFICIENT 230V, 12.0 AMP, 56 Frame 6.5" Diameter AO Smith or US Motors 12 amp motor, with industry standard 4x6.5" base, 3x5" bolt pattern. Pump has 3.1" Outside Diameter threaded connections. 2"SD/CS. fits MAAX, Coleman, Artesian, Cal Spas, and many other spas. Sometimes ships with 4 slot motor base and sometimes with 6 slot base.

This is an new, 1016174 spa pump and labelled as 4.0 horsepower.

And when it is shipped to Sundance Spa, Jacuzzi Spas, and others, they may mark it up as a 6 horsepower, but it is still a 12 amp motor doing 12 amps of work. Real output is always measured by volts x amps = watts, so this is a 2760 watt pump and can be stickered as 4hp, 5hp, 6hp, and even 7hp but the stickers do not change the performance.

These are new Ultra Jet® pump components assembled on new high quality US Motors or AO Smith/Century motors, and are replacement pumps compatible with Balboa Water Group® Ultra Jet® Pumps.