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  • Balboa VS/EL/BP Expander Board 33-55137-K — In Stock & Ready to Ship Is your hot tub's second pump no longer responding? The Balboa Expander Board 33-55137-K is the genuine replacement circuit board you need to get your spa running again. Shop and order at Western Tub and Pool — and if you need help finding the right part, call us at 1-855-248-0777. [Shop Now] [Call Us: 1-855-248-0777] What Is the Balboa 33-55137-K Expander Board? The Balboa VS/EL/BP Expander Board (part number 33-55137-K) is a 2-relay printed circuit board (PCB) that mounts alongside the main control board in select VS520 Series hot tub systems. It provides a second 2-speed pump output, giving your spa the power and control it needs to operate additional jets and pumps efficiently. This is a genuine Balboa Water Group replacement part — one of the world's most trusted names in spa control technology. Key Features & Specifications Features 2-relay design for reliable, dual-output pump control Built-in sensor and two integrated connectors Includes a 30 Amp fuse for added protection 12 Amp maximum load rating 1-year manufacturer's limited warranty Compatible with a wide range of VS520 Series Balboa control systems Dimensions & Weight Board Size: 3.125" x 1.625" Weight: Approximately 0.51 lbs Box Dimensions: 10.75"W x 2.25"H x 1.75"D Compatible Hot Tub Control Systems The Balboa 33-55137-K Expander Board is designed for use with the following Balboa control system models: VS520Z VS525Z VS520SZ VS520DZ VS523DZ LPI501 Systems (replaces part number 56710) Not sure if this is the right board for your system? Call us at 1-855-248-0777 or email us at fixmytub@gmail.com with your hot tub's make, model, and serial number, and our team will help you confirm compatibility. Compatible Replacement Part Numbers This board is a direct replacement for the following part numbers: 33-55137-K 33-0029C-K 59-355-1600 59-355-1051 3-60-0087 3-00-5012 X-P332 56710 (used in LPI501 Systems) G1920 Frequently Asked Questions What does the Balboa 33-55137-K Expander Board do? This expander circuit board is mounted in addition to the main control board in VS520 Series hot tub systems. Its primary function is to provide a second 2-speed pump output, enabling your spa to power additional pumps and jets. How do I know if this board fits my hot tub? Check your existing control system model number — if it matches any of the VS520Z, VS525Z, VS520SZ, VS520DZ, or VS523DZ models listed above, this board is likely the right fit. If you're unsure, send us your hot tub's make, model, serial number, or a photo of your existing board to fixmytub@gmail.com, and we'll help you confirm. Is this a genuine Balboa part? Yes. The 33-55137-K is a genuine Balboa Water Group product, manufactured by one of the most trusted names in the spa industry. Balboa Water Group products are used in hot tubs around the world. What is the warranty on this board? This board comes with a 1-year limited manufacturer's warranty. Please note that electrical or physical damage resulting from improper installation or incorrect PCB selection will void the warranty. Can I install this board myself? This is rated as a higher-complexity installation. If you have the technical skills, knowledge, and tools to safely work with spa control systems, installation is straightforward. However, if you are unsure, we strongly recommend engaging a qualified spa technician. Feel free to call us at 1-855-248-0777 for guidance. Do you ship this part quickly? Yes — this part typically ships within 1 business day of your order being placed. I can't find my part number. Can you still help? Absolutely. Western Tub and Pool specializes in hard-to-find hot tub replacement parts. Send us an email at fixmytub@gmail.com with photos of your existing board, along with your hot tub's make, model, and serial number. Our team will do the research for you. Why Shop at Western Tub and Pool? At Western Tub and Pool, we understand how frustrating it is when your hot tub stops working. That's why we stock genuine replacement parts — like the Balboa 33-55137-K — and back every sale with real, knowledgeable support. Hard-to-find parts sourced and stocked for you Expert assistance from people who know hot tubs inside and out Fast shipping — most orders ship within 1 business day Personalized help for identifying the right part for your system Get Your Hot Tub Back Up and Running Don't let a faulty circuit board keep you out of your spa. The Balboa VS/EL/BP Expander Board 33-55137-K is in stock and ready to ship. Shop and order at Western Tub and Pool today, or reach out to our team for personalized support. Call us: 1-855-248-0777 Email us: fixmytub@gmail.com Not sure if this is the right part? Send us your part number, hot tub make and model, serial number, or photos, and we'll help you find exactly what you need. [Order Now] [Contact Us]

    • Balboa VS/EL/BP Expander Board

    Balboa

    $71.40
    (No reviews yet) Write a Review
    SKU:
    33-55137-K
    UPC:
    33-55137-K
    Availability:
    Ships from U.S
    Width:
    14.00 (in)
    Height:
    10.00 (in)
    Depth:
    8.00 (in)
    Adding to cart… category.add_cart_announcement

    Product Description

    33-55137-k.png

     

    Balboa VS/EL/BP Expander Board 33-55137-K — In Stock & Ready to Ship

    Is your hot tub's second pump no longer responding? The Balboa Expander Board 33-55137-K is the genuine replacement circuit board you need to get your spa running again. Shop and order at Western Tub and Pool — and if you need help finding the right part, call us at 1-855-248-0777.
    [Shop Now] [Call Us: 1-855-248-0777]

     

    What Is the Balboa 33-55137-K Expander Board?

    The Balboa VS/EL/BP Expander Board (part number 33-55137-K) is a 2-relay printed circuit board (PCB) that mounts alongside the main control board in select VS520 Series hot tub systems. It provides a second 2-speed pump output, giving your spa the power and control it needs to operate additional jets and pumps efficiently.
    This is a genuine Balboa Water Group replacement part — one of the world's most trusted names in spa control technology.

     

    Key Features & Specifications

    Features

    • 2-relay design for reliable, dual-output pump control
    • Built-in sensor and two integrated connectors
    • Includes a 30 Amp fuse for added protection
    • 12 Amp maximum load rating
    • 1-year manufacturer's limited warranty
    • Compatible with a wide range of VS520 Series Balboa control systems

    Dimensions & Weight

    • Board Size: 3.125" x 1.625"
    • Weight: Approximately 0.51 lbs
    • Box Dimensions: 10.75"W x 2.25"H x 1.75"D

     

    Compatible Hot Tub Control Systems

    The Balboa 33-55137-K Expander Board is designed for use with the following Balboa control system models:

    • VS520Z
    • VS525Z
    • VS520SZ
    • VS520DZ
    • VS523DZ
    • LPI501 Systems (replaces part number 56710)

    Not sure if this is the right board for your system? Call us at 1-855-248-0777 or email us at fixmytub@gmail.com with your hot tub's make, model, and serial number, and our team will help you confirm compatibility.

     

     

    Compatible Replacement Part Numbers

    This board is a direct replacement for the following part numbers:

    • 33-55137-K
    • 33-0029C-K
    • 59-355-1600
    • 59-355-1051
    • 3-60-0087
    • 3-00-5012
    • X-P332
    • 56710 (used in LPI501 Systems)
    • G1920

     

    Frequently Asked Questions

    What does the Balboa 33-55137-K Expander Board do?

    This expander circuit board is mounted in addition to the main control board in VS520 Series hot tub systems. Its primary function is to provide a second 2-speed pump output, enabling your spa to power additional pumps and jets.

    How do I know if this board fits my hot tub?

    Check your existing control system model number — if it matches any of the VS520Z, VS525Z, VS520SZ, VS520DZ, or VS523DZ models listed above, this board is likely the right fit. If you're unsure, send us your hot tub's make, model, serial number, or a photo of your existing board to fixmytub@gmail.com, and we'll help you confirm.

    Is this a genuine Balboa part?

    Yes. The 33-55137-K is a genuine Balboa Water Group product, manufactured by one of the most trusted names in the spa industry. Balboa Water Group products are used in hot tubs around the world.

    What is the warranty on this board?

    This board comes with a 1-year limited manufacturer's warranty. Please note that electrical or physical damage resulting from improper installation or incorrect PCB selection will void the warranty.

    Can I install this board myself?

    This is rated as a higher-complexity installation. If you have the technical skills, knowledge, and tools to safely work with spa control systems, installation is straightforward. However, if you are unsure, we strongly recommend engaging a qualified spa technician. Feel free to call us at 1-855-248-0777 for guidance.

    Do you ship this part quickly?

    Yes — this part typically ships within 1 business day of your order being placed.

    I can't find my part number. Can you still help?

    Absolutely. Western Tub and Pool specializes in hard-to-find hot tub replacement parts. Send us an email at fixmytub@gmail.com with photos of your existing board, along with your hot tub's make, model, and serial number. Our team will do the research for you.

     

     

    Why Shop at Western Tub and Pool?

    At Western Tub and Pool, we understand how frustrating it is when your hot tub stops working. That's why we stock genuine replacement parts — like the Balboa 33-55137-K — and back every sale with real, knowledgeable support.

    • Hard-to-find parts sourced and stocked for you
    • Expert assistance from people who know hot tubs inside and out
    • Fast shipping — most orders ship within 1 business day
    • Personalized help for identifying the right part for your system

     

    Get Your Hot Tub Back Up and Running

    Don't let a faulty circuit board keep you out of your spa. The Balboa VS/EL/BP Expander Board 33-55137-K is in stock and ready to ship.
    Shop and order at Western Tub and Pool today, or reach out to our team for personalized support.
    Call us: 1-855-248-0777
    Email us:fixmytub@gmail.com
    Not sure if this is the right part? Send us your part number, hot tub make and model, serial number, or photos, and we'll help you find exactly what you need.
    [Order Now] [Contact Us]

     

    Other Details

    Shipping , Returns & Exchanges We offer 30-day exchanges or store credit on eligible items. Please note that we do not provide refunds. Return Process: Customers are responsible for return shipping costs Items must be returned within 30 days of purchase Important Notes: All recycled items are final sale and cannot be returned or exchanged Items must be in original condition to qualify for exchange or store credit Electronic and electrical items should be installed by competent personnel . Warranty on these products when offered are scrutinized by the manufacturer and only approved by the manufacturer and deemed not to have been installed . As an international e-retailer and distributor, we work with manufacturers around the world. Please note that cross-border shipments may incur additional fees and tariffs imposed by your local government, which will be the responsibility of the package recipient

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