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A spa circuit board is the "brains" behind your spa, controlling jet flow, filtration systems, water temperature, as well as the unit's high-limit sensors. Master Spa Parts offers a number of replacement circuit boards.

SpaBoss pH Stable is the easiest way to keep your hot tub water balanced and under control. By keeping the pH level stable, you won’t need any many other chemicals in the water. Balanced water chemistry prolongs the life of your hot tub and all the working parts that make it enjoyable.

One of the things we love about the Swim Spa Eco Pur Filter is that is can reduce your chemical consumption by up to 75% while cleansing your spa or hot tub of harmful contaminants, bacteria, and microbes. Essentially, this mineral filter for Swim Spas is the filter that pays for itself!

This Eco Pur pure filter works with most Master Spa® H2X & Michael Phelps Swim Spas.

Designed for outdoor projects that involve a wood-to-wood connection. Keep the parts of your spa well-fastened and ensure safe use.

Spa Marvel Startup Kit

Proline Jet Line Cleaner clears your hot tub jets of all unwanted organics, oils, residue, dirt, minerals and biofilm. It's a great way to keep your hot tub jets clean, clear, and working properly!

Measure the chemical balance of chlorine based water with AquaChek Chlorine 4-in-1 Test Strips in 15 seconds.

• Count: 50 test strips
• Tests for: Free Chlorine, pH, Total Alkalinity, Stabilizer (Cyanuric Acid)

Measure the chemical balance of bromine based water with AquaChek Red 4-in-1 Bromine Test Strips in 15 seconds.

• Count: 50 test strips
• Tests for: Total Bromine, pH, Total Alkalinity and Total Hardness

The VL702S Topside Hot Tub Control Panel (SKU: X310190) is a versatile model compatible with numerous models of Down East Spas and Twilight Series™ spas. The seven buttons on this controller are designed for use in low-light and nighttime conditions, as well as an LCD readout display.

This product comes with free shipping!

SpaBoss Alka Rise boost low alkalinity levels in your spa or hot tub with ease. Prevent pH bounce and damage to your hot tub with this easy to use product.

Spa heaters, automated systems, lights, and salt-water chlorinators all depend on a functional circuit board. With Master Spas®' MS50 U PC board, you can bring back the functionality of your spa or hot tub. Get this MS50 PCB fast and free from the Master Spa Parts warehouse when you order from our online store.

SpaBoss X-It makes it easy to switch sanitizers or to lower excessively high levels of chlorine or bromine in your spa or hot tub without having to drain and refill the whole thing.