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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).

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.

This Master Spa Factory OEM 79" x 69" hot tub cover replacement (SKU: 457969) is specifically designed to fit your Master Spas® hot tub. This cover ensures energy efficiency 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. 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 79" x 69" hot tub cover folds along the long edge. 

When it comes time to replace your circuit board and return function to your spa's lighting, jet pumps, and high-limit sensors, we've got you covered. Master Spa Parts has numerous legacy Whirlpool® replacement circuit boards in stock, including this MAS520 PC Board (V/N 54357).

Are you ready for the good news? This legacy Whirlpool® circuit board replacement for MAS520 ships fast and with free shipping to all addresses in the Continental United States.

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.

Master Spa Parts offers the perfect replacement part for the main air valve knob on your Master Spas® H2X swim spas. The Master Air Control Handle, Width 3.25 Inch is compatible with 2008 and 2009 models of the H2X Cross Trainer, H2X Swim Spa, H2X Cross Trainer SJ, and H2X Cross Trainer 2.

Did you know that the amount of microbes on filtration surfaces can double every 20 minutes? The warm water and organic materials are the perfect breeding grounds for germs. But, with the Pleatco H2X® Trainer & Michael Phelps filter PMA-R4, germs and microbes don’t even have a chance. Pick up your Swim Spa ECO PUR CHARGE System Filter from the Master Spa Parts online store, today!

At Master Spa Parts, we always have the Outer Filter PMA-R3 for Clarity & Healthy Living (x268548) in stock and ready to ship. This is simply the best filter you can buy for your Clarity, Healthy Living, or Twilight Series spa. After all, clean, clear water in your spa starts with excellent filtration — and no other filter delivers on those promises like Pleatco.

The pump marvel drains up to thirteen times faster than siphoning or draining! Unlike a garden hose, this pump does not lose its prime, and can lift and discharge water up to 20’ high. Don’t be fooled, the pump marvel is not a siphon, it’s a true pump! Please note that this pump does not take electricity.

The 78" x 66" Hot Tub Cover (Long-edge Fold) is an exact Master Spa Factory OEM replacement. 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.

Note: This particular cover folds along the longer 78" edge. If you need a cover with these same dimensions (66" x 78") but that folds along the short edge, try our 66 × 78 Inch Hot Tub Cover (Short-edge fold).

When a spa's printed circuit board (PCB) fails it can mean the lights, pumps, safety shut-offs, filtering systems, or all of the above will not function as expected. With products such as the MS1700 Circuit Board V/N: 56157 and others for Michael Phelps swim spas, Master Spa Parts can have your spa up and running in no time.

Customers in the Lower 48 can also take advantage of our quick, complimentary shipping offer on this MS1700 circuit board replacement and others $99 and over.

Has your spa’s air control (or air controls) begun making a whistling sound, or are your nozzles completely blocked? For select models of Clarity Spas, Healthy Living Hot Tubs, and Legacy Whirlpool hot tubs, the best replacement air control is the 1” Air Control DSG/Titanium from Master Spa Parts. As many of our customers have found, this spa air control nozzle will bring back the comfort and enjoyment of your spa — all at a price that’s nice!