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As the "command center" of your spa, the circuit board is tasked with making sure your blowers, lights, air filtration system, and high-limit sensors work correctly. Whether you're looking to replace your Down East Spas MS510/1500/1600 Ext. PCB (V/N 53681) or another unit, Master Spa Parts offers a vast selection of replacement circuit boards. These are all competitively priced and ready to ship.

The Circuit board replacement for Twilight Series™ Spas always ships typically within 24 hours to customers ordering this and other spa circuit boards through the Master Spa Parts online store.

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 X-It makes it easy to switch sanitizers or to lower excessively high levels of chlorine or bromine in your spa or hot tub without having to drain and refill the whole thing.

The Grey Legend Lounge Pillow fits the Down East Spas, H2X Swim Spas, and Legend Series Master Spas line of hot tubs.

If you have the know-how, restoring your spa's jet pumps, lights, high-limit sensors, blowers, and other essential features with a new circuit board can be a piece of cake. When you purchase your Master Spas® MS 5100S Circuit Board V/N: 56122 from Master Spa Parts, you can expect a quality replacement board and terrific savings.

Swim Tether Mini is a compact single-pole version of the 3-Part Swim Tether that measures 24 inches in height. This shorter version is ideal for water aerobics and physical therapy sessions. A minimum of fourteen feet of swim space is recommended. Ideal for attachments such as handle grips or ankle straps.

The Original Swim Tether is designed to provide a unique resistance workout for swimmers of all skill levels. Quickly install and assemble to swim in most swim spas and swimming pools. A minimum of fourteen feet of swim space is recommended. Using optimal lift and an elevated connection point allows the swimmer to swim unencumbered by cords and restrictive ankle attachments.

Enjoy music in your spa with the ambience of lights the Flush Mount LED Speaker provides. Easily installable on Master Spa hot tubs/spas.

Replacement filters from Pleatco offer great savings and are an effective way to filter the spa water in your Down East Spas, Freedom Spas, or Legend Series hot tub. And, Master Spa Parts offers fast shipping — typically within 48 hours of your order!

Order your Down East Spas, Freedom Spas, or Legend Series filter PRB35-IN by Pleatco, today!

Stainless Steel Shaft

The sensor assembly is specifically designed to go with Down East Spas and Legend Series Master Spas (select 1996-1999 models). It is a replacement for Balboa Dual Sensor Assembly with Temperature and Hi-Limit Sensor. Compatible with all Balboa systems that use this type of sensor.

Spa Marvel water treatment & conditioner 16oz