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Replacement mineral cartridge for the Spa FROG Serene Floating System or pre-installed Spa FROG inline system.

Master Spa Parts offers an OEM 4-button decal for Down East Spas’ legacy models (1999-2003). Since the Down East 4-Button Overlay product is manufactured by Down East Spas, you can expect spectacular results when replacing your original adhesive controller overlay. Plus, a vast majority of Master Spa Parts products ship out within 24 hours of receiving your order!

The Master Spa® Factory OEM 78" x 78" (6.5') replacement hot tub cover (SKU: X457878) is specifically designed to fit your Master Spas® hot tub. This replacement custom hot tub cover ensures energy efficiency as it consists of a 1.5lb foam density, 6 inch thick foam insulation that tapers to 4 inch, full length heat seal cushions that help prevent heat loss, and upgraded black rubber handles.

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Designed specifically for 2015 Michael Phelps Swim Spas this sensor is a replacement for the sensor in your spa’s heating system allowing you to control the heat of your spa from the external control panel. If you don’t see your model listed, it may still work – so please give our customer service a call!

The Master Spas® hot tub replacement cover 70" x 84" is an exact Master Spa Factory OEM replacement (SKU: X457084). It is specifically designed to fit your Master Spas® hot tub. This cover is extremely energy efficient, as it's made of a 1.5-pound foam density, six-inch thick foam insulation (which tapers to 4-inches along the sides), and a full-length heat seal. It has been upgraded to include two rubber grip handles and is made of a high quality marine-grade vinyl covering that is mildew treated and protects against UV rays.

Note: This particular hot tub cover folds along the short edge. Find the corresponding long-edge fold cover here.

H2X® and Master Spas® Legend Series™ filters are expensive, but worth every penny when you consider the investment (and enjoyment) of your swim spa. Master Spa Parts’ Swim Spa ECO PUR CHARGE 7 Filter Set is an economical way to keep your spa clean and ready for use.

Start saving — order bulk filters for your H2X® & Michael Phelps swim spas from the Master Spa Parts online store. This product qualifies for free shipping to the Continental United States.

Sync your favorite MP3 player to the Deluxe Bluetooth Docking Station. Watertight media player from Aquatic AV. Dock and sync your phone or MP3 player and begin to enjoy your music with remote control access from up to 40 ft. !

Customers in the contiguous 48 states of the USA enjoy free shipping on this item.

The 70" x 83" Hot Tub Cover (Short-edge Fold) (SKU: 457187) is designed to fit your Master Spas® hot tub. This cover ensures extreme energy efficiency as it is made of a 1.5-pound foam density, six-inch thick foam insulation (which tapers to 4-inches along the sides), and a full-length heat seal to help prevent heat loss. Additionally, it is made of a high end marine-grade vinyl covering that is mildew treated, and consists of upgraded rubber grip handles.

Note: This particular cover folds along the shortest 70-inch edge. For a hot tub cover folding on the long edge, please see 83" x 70" Hot Tub Cover (Long-edge Fold).

Most likely you're visiting our online store today because your spa's circuit board has failed. And, we'd like to say you've come to the right place! As one of the most trusted online spa parts vendors, Master Spa Parts offers this MS1000 External PCB (V/N 53290) from the original equipment manufacturer at a great value. To make this offer even better, we provide free shipping on this external circuit board replacement for MS1000 to all destinations in the Lower 48.

The 84" x 94" Hot Tub Cover is a Master Spa Factory OEM replacement (SKU: x458494). It is specifically designed to fit your Master Spas® hot tub. This cover is extremely energy efficient, as it's made of a 1.5-pound foam density, six-inch thick foam insulation (which tapers to 4-inches along the sides), and a full-length heat seal. It has been upgraded to include two rubber grip handles and is made of a high quality marine-grade vinyl covering that is mildew treated and unfazed by UV rays.

Note: This particular hot tub cover folds along its shortest dimension (the 84" side).

The CoverCatch helps keep your spa cover close by and off the ground! It is ideal for smaller sizes spas and covers.

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!