replacement for 1016174 10-16-174 UltimaxTM 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. 1016025. With industry standard 4 slot motor base. If you need old style big motor base with 6 slots look at p/n 1016016This is an new, 10-16-174 spa pump and labelled as 4.0 horsepower, but 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.