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H2X Swim Spas Heaters and Heater Parts

As the #1 supplier of Master Spa replacement parts, we have a huge selection of original OEM Master Spa heaters and hot tub heater replacement parts, including Master Spa heaters, Master Spa heater straps, Master Spa temperature sensors, and more. Most orders ship same day, and we offer free shipping on all orders over $99 in the U.S. If you are unsure about which heater part you need for your spa, compare the first five numbers on your heater (located under the barcode) to the V/N number on our website.

If you need additional assistance, you can always call our Customer Service team at (855) 308-2149. We’re happy to help!

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  1. picture of tool tip icon

    The 5.5kW 15 inch Heater with 12-inch leads M7 sensors is a replacement part for the original heater in selected models of the Clarity, Down East. Legend Series Master Spas and Freedom Spas. Easily installable so you can get back to enjoying your heated Swim spa and hot tub in no time at all. If you don’t see your model listed, it may still work – so please give our customer service a call!

    If you need/would like to try to troubleshoot your heater (before buying a new one and spending the money) we have an article called How to Troubleshoot Your Hot Tub Heater for you to review! Take a look and see if you can fix the issues you're having - for free!

    5.5k heater for spa
  2. picture of tool tip icon

    The 12-inch A&B M7 Temp/High Sensor is a replacement sensor for several Spa models including the Clarity, Down East, Contractor, Freedom, Getaway, H2X Swim Spas, Healthy Living Hot Spas, Legacy Whirlpool, Legend Series Master Spas, Michael Phelps Swim Spas and Twilight Series Spas. If you don’t see your model listed, it may still work – so please give our customer service a call!

    master spa temperature gague
  3. picture of tool tip icon

    The 4.0kW Heater (V/N 55950) is a replacement part for selected models of the H2X Swim Spas (Momentum 80, H2X Momentum) and Michael Phelps Swim Spas (Momentum 80)

    Easily installable so you can get back to enjoying your heated Swim spa and hot tub in no time at all.

    4.0kw heater for spa
    Special Price $275.95 Regular Price $285.00
  4. picture of tool tip icon

    This is a Balboa P/N 58132 Auxiliary Heater 5.5 kW. This auxiliary heater is plumbed in series with the main spa pack heater and adds 5.5 kW of additional heating power, which typically doubles the heating power and reduces the heating time to half.

    This unit is designed to go with select H2X Swim Spas and Michael Phelps Swim Spas.

    auxilary heater for hot tubs
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