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Spa Pump - Side Discharge
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1.5 HP Spa Pump: 1.5" in/out, Side Discharge, 48 Frame-120V

SKU: BX4102-S1
PRICE: $209.95

  Rating: 5.0 out of 5 stars5.0 out of 5
3 Reviews
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2-Speed Heavy Duty Spa Pump
(easily configured for 1-speed) How to

Our premium quality Spa Pumps are unsurpassed for reliability and long life. Because of our huge buying power, we charge less for a complete new hot tub pump (motor & wet end) than some others charge for just a replacement motor or rebuilt unit!

2 Year Warranty High Performance Motors We use top quality Waterway wet ends and new high performance motors-- the best money can buy.

Need help? See the replacement spa pump informationPump Selection & Installation Guide

Spa Pump Dimensions A: 16"
B: 8 1/4"
C: 3 1/2"
About Frame size

Side vs. Center Discharge

Orientation of Wet End

Pump wet ends can be oriented in 90º increments to meet your installation requirements. Loosen the pump's four through bolts from the back of the motor and pull them back enough to disengage. Then rotate the wet end to the desired position, realign and re-tighten the bolts.  

Wet ends can be rotated

How to Determine Spa Pump Plumbing Size
by measuring O.D. of wet end male threads

Plumbing size

Pump plumbing sizes are nominal, and not actual outside diameter (OD) of the threaded intake or discharge. Use a tape measure and check your old pump thread size against this sizing table for most* spa pump brands:

Plumbing Size
Pump Thread O.D. (approx.)

Product notes: 110-120V, 13.8A high speed (3450 RPM), 3.8A low speed (1725 RPM). 125 GPM on high speed. Order new pump unions (link below) if needed. Waterway part number: 3420610-1Z. Replaces motor numbers RB804, BN50, 5KCP39SN4457X. FMHP-551021 and EZBN50.

IMPORTANT: *Some brands of hot tub spa pumps (such as Hayward, Jacuzzi, and Sta-Rite) use non-standard fittings with different dimensions.

Help Desk Great price and features aside, buying from The Spa Depot provides access to one thing you can't get anywhere else: our expert technical support. Installation questions or need assistance? We're here to help!

Toll Free (800) 823-3638 Support hours: Weekdays, 8 am - 5 pm, Pacific Time

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Excellent     11/8/2014
Replacement Jet Pump
After trying to work with my local Hot Springs dealer and feeling like he saw me as his personal retirement account I started doing my homework. These people were helpful, informative, and shipped me exactly what I needed. As a FYI my local dealer told me it would cost $900.00 to get a new pump and he would have to be re-plumb for an additional $200.00. It was $209.00 from these fine folks and it dropped straight in perfectly, what a deal! Whenever I need anything more for my Hot Springs Hot Tub I'm coming here!

Reviewer: Male   Age Group: 55 or Older
Location: Santa Barbara, Ca.
Has owned this product for: 2 - 7 weeks
Uses product: Daily

Recommends this product? Yes

Excellent     9/16/2014
It's quiet. I upgraded from 1 1/8 to this 1 1/2 and it's great. I converted my tub's fitting over to match this as Jacuzzi is a different setup. It was cheaper and will be cheaper the next time I need to replace the motor.

Reviewer: Male   Age Group: 25-34
Location: Massillon, OH
Has owned this product for: 2 - 7 weeks
Uses product: Several times a month

Recommends this product? Yes

Excellent     8/6/2014
I bought this pump to replace my waterway 3000, I fit perfect in my Watkins Hot Spot, It is a slightly larger motor 1.5 hp as the old one was 1 hp. This old hot tub has never ran this good until now!

Reviewer: Male   Age Group: 45-54
Location: Minneapolis Mn
Has owned this product for: 2 - 7 weeks
Uses product: Daily

Recommends this product? Yes

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