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The 50 Amp Fuse for Wave XP Pro Propulsion is a small, durable, easy-to-install replacement power fuse designed to go in your swim spa. This fuse supplies power to the propulsion in your swim spa, so keeping it working and good condition is vital to the enjoyment of your spa.

Replacement support arm for the CoverMate I Eco B and the inner support arm for the CoverMate Freestyle.

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).

This is the Lock Clip replacement part for your Master Spas Hot Tub Cover. This replacement piece is made of sturdy plastic and helps to keep your hot tub secure. Furthermore, it aids in preventing wind damage to the cover. This replacement piece has a SKU number of X900103 and is sold through Master Spa Parts.

SpaBoss Spa Shock (2 lb.) is the shock product that you need to keep contaminants from ruining your hot tub water and plumbing. Your chlorine and bromine sanitizers work hard to keep your water disinfected, and shocking the water regular with a non-chlorine shock keeps organic matter and bacteria from building up. Comes in a 2lb. bag.

Temperature Sensor Mount. Used in older style Master Spas to secure the flow sensor to the spa. A new mount should always be installed when you are replacing your spa sensor unit.

This mount should fit with most sensors.

The pressure switch in your spa controls the water pressure in your spa. The pressure switch harness is a replacement part for the original pressure switch harness that allows the pressure switch to be connected to the controls of your spa.

Swim Spa Combo, MSWIM15 Auxiliary Divert Overlay 2010

2 x1/2 inch Threaded Reducer Bushing Bushing

This 67" x 78" Hot Tub Cover (Short-edge Fold) hot tub cover replacement (SKU: 457969) is specifically designed to fit your Master Spas® hot tub. This cover ensures you energy efficiency as it is made of a 1.5-pound foam density, six-inch thick foam insulation that tapers to 4-inches along the sides, and a full-length heat seal to prevent heat loss. Additionally, it is made of a high-quality marine-grade vinyl covering that is mildew treated and protects against UV rays. Additionally, it boasts upgraded rubber grip handles.

Note: This particular hot tub cover folds along the shorter 67" edge. 

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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.

Copper Heater Straps. These are the longer style heater straps. These are the most common heater straps. These heater straps are used to connect power from the PC board and the heater.