Master Spas

Master Spas is a large U.S. manufacturer based in Indiana and one of the most recognized names in the swim spa category. It builds its swim spas in-house and markets several distinct families aimed at swimmers and fitness-focused buyers.

What they're known for

Master Spas is widely associated with the Michael Phelps Signature Swim Spas line, developed in partnership with the Olympic swimmer, along with additional swim and exercise spa families. Their marketing centers on the swim experience and aquatic fitness, and they sell through a dealer network.

What to evaluate

As with any brand, the name on the cabinet matters less than the specific model in front of you:

• The swim current. Master Spas offers different propulsion approaches across lines — test-swim the exact model and setting you'd buy.
• Build and insulation. Confirm the construction and insulation for the model and your climate.
• Warranty specifics. Read the written terms for the line you're considering, including labor.
• Your local dealer. Service and support quality vary by dealer; vet yours per where to buy.

Bottom line

A established, swim-focused manufacturer worth shortlisting if its lines fit your needs — evaluated, as always, on the actual model, a real test swim, the written warranty, and your local dealer. Confirm current models and pricing directly.