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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.

As an all-in-one spa and hot tub treatment kit, the SpaBoss Hot Tub Chemical Starter Kit has everything you need to get your spa or hot tub up and running — and ensure it is always safe and ready to use. As a six-piece hot tub treatment kit, it’s quite an economical option, too!

The Hot Tub Chemical Starter Kit (SKU: X777700) includes:

• Granular pH Plus (1.5 lbs)
• Granular pH Minus (2 lbs)
• Granular Non-Chlorine Shock (2 lbs)
• Granular Chlor-Aid (2 lbs)
• Liquid Prevent II (16 oz)
• AquaChek Test Strips (50 Strips)

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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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 Master Spa® Factory OEM 6.5' x 6.5' replacement hot tub cover (SKU: X454065)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 two upgraded black rubber handles.

The Master Spa® Factory OEM 84” x 84” replacement hot tub cover has a 12" radius and is for Getaway Spas ONLY.

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.

The 8' x 8' (94" x 94") Master Spas® hot tub replacement cover is a Master Spa Factory OEM replacement (SKU: X454888). It is specifically designed to fit your Master Spas® hot tub. This cover is energy efficient, as it's made of a thick 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.

The 7x7 Master Spas® hot tub replacement cover (84” x 84”) is a Master Spa Factory OEM replacment (SKU: X454777).

This cover fits other makes of Master Spa, and is the standard at 84" x 84" with a 6" radius.

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.