The 4HP Balboa Ultimax Hot Tub Pump - 5235212-S has two speeds, and the 56-frame motor has an amp rating of 12.0 amps for high speed and 3.5 amps for low speed. Balboa pumps have the same design and footprint as the discontinued Ultrajet and Ultimax had making it a simple swap when a replacement is needed. Always ensure that the new replacement pumps high and low speed amps do not exceed your old pumps amps.
Details:
- 230 volts, 60 hz
- 2 speed
- 2" intake (Measures 3" outside to outside thread)
- 2" discharge (Measures 3" outside to outside thread)
- 56 Frame motor
- 12 Amps on high speed (4HP, 3.0 OP.HP)
- 3.5 Amps on low speed
- Balboa OEM Part #5235216-S
- New cord and unions not included, sold separately.
Also replaces Balboa and Ultrajet pumps with the following P/N:
- 1016205 - Balboa
Important:
Balboa ships these pumps with either a Century or U.S. Motors brand electric motor, the U.S.Motors have the standard 4 wide base with mounting holes at 3" O/C, the Century brand motors may have the non standard wider 6" base with mounting holes at 3" and 5" O/C.
Horsepower ratings
Choosing a pump based on Horsepower (HP) can be incorrect. The horsepower listed in your spa manual or on the old pump's label may be overinflated, inaccurate, or even left blank. Horsepower ratings on hot tub pumps are often listed as SPL-HP, BHP, MBHP, RHP or S-HP, which is not the same as continuous operating horsepower. Installing an oversized pump in your hot tub can cause significant damage.
To avoid choosing the incorrect pump, confirm if it’s a 48 frame or 56 frame, then use the high-speed Amperage rating listed on the old pump's label to find the correct replacement instead of the horsepower. The amperage rating is listed with both high/low speed for a 2-speed pump.
Determining hot tub pump thread size
Hot tub pump plumbing sizes are nominal and not the actual outside diameter (O.D.) of the threaded intake or discharge. To confirm your old pump thread sizes, use a tape measure and check the diameter of your old pump thread size.
- 1.5” Pump thread measures approx. 2-3/8” Outside Diameter
- 2.0” Pump thread measures approx. 3” Outside Diameter
- 2.5” Pump thread measures approx. 3-5/8” Outside Diameter
Amperage ratings
New hot tub pump amperage ratings may vary slightly for pumps with the same performance rating. The RPMs remain the same 3450 for high-speed and single-speed pumps and 1725 for low-speed for two-speed pumps.
