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Our Master Spas® 83" x 70" hot tub cover (SKU: 458771) is a factory direct OEM replacement cover specifically designed to fit your Master Spas® hot tub. Consisting of 1.5lb foam density, long steam stopper cushions, six-inch foam insulation, four inch tapered sides, upgraded rubber grip handles and a 24-R value (the greater the R-value, the better the heat storage and heat retention), this cover prevents heat loss and is extremely energy efficient.

Note: This hot tub cover folds along the long edge.

The Master Spa® Factory OEM 84" x 70" replacement hot tub cover 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.

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

Have you been searching for a spa grab bar that can be used for lower body workouts, or as a handrail for getting in and out of your swim spa? The RX Swim Spa Contoured SST Grab Bar is a great option. Its unique contours allow for an easy grip and its heavy-duty construction resists rusting and corrosion.

This Master Spa Factory OEM 78” x 78” hot tub cover replacement (SKU: X120240)  is specifically designed to fit your Master Spas® hot tub. This cover is energy efficient as it consists 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. It is also made of a high end marine-grade vinyl covering that is mildrew treated, and consists of upgraded rubber grip handles.

The Spa Dragon is a patented monitoring system with thermal backup protection that prevents freeze damage caused by equipment failure. Stay worry-free in winter, with real-time alerts and automatic heating activation—no matter where you are.

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.

Hey, we’ve all been there; you’re enjoying yourself in the hot tub, buy you have to step out for a refreshment or snack. So, you throw on a towel, step out, and the cold hits you. With the SpaCaddy, your beverage, snack, or smartphone is always within reach — without having to leave the comfort of your spa or hot tub!

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).

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).

Spas and hot tubs that operate with a failing circuit board put the whole works (and your safety) at risk. We can help bring back the enjoyment of your spa — order this MS501S circuit board replacement and receive free shipping to all addresses in the "Lower 48".

If you've pinpointed your spa's issue to the circuit board, replacing your board can bring back many essential functions and safety features, such as your lights, heat sensors, high-limit sensors, and jet pumps.

At Master Spa Parts, we're proud to carry a diverse selection of circuit boards, including this Master Spas® circuit board, sold under the product name of "Master Spas® Circuit Board MAS400 PC Board (V/N 52185)" in our online store.