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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".

Spa Marvel Startup Kit

Proline Jet Line Cleaner clears your hot tub jets of all unwanted organics, oils, residue, dirt, minerals and biofilm. It's a great way to keep your hot tub jets clean, clear, and working properly!

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!

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.

Topside Bulb

The Sensor, 24” x ¼” F/560 M7 is a high limit temp replacement sensor for the MAS560 sensor found in most Down East and Legend Series Master Spas.

Don’t let a broken sensor prevent you from your enjoying your spa when you want to.

Measure the chemical balance of chlorine based water with AquaChek Chlorine 4-in-1 Test Strips in 15 seconds.

• Count: 50 test strips
• Tests for: Free Chlorine, pH, Total Alkalinity, Stabilizer (Cyanuric Acid)

Measure the chemical balance of bromine based water with AquaChek Red 4-in-1 Bromine Test Strips in 15 seconds.

• Count: 50 test strips
• Tests for: Total Bromine, pH, Total Alkalinity and Total Hardness

This is the five-inch nut that is a replacement part sold right here, through Master Spa Parts. This replacement piece measures five inches in diameter and works on several models within the 2005 Down East Spa series of home spas. Made of sturdy plastic this replacement part has a SKU number of X241054 and is designed to provide a tight fit in order to prevent leaks.

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.

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.