Calculate Finance Reserve with a £1,000 Deposit Delivery Information Warranty Program


Colour Options


  • Manufactured in the USA by Master Spas™
  • Elite Performance Swim Spa
  • Heat Pump Ready
  • 180" x 94" x 60" / 457cm x 239cm x 153cm
  • 6 VIP Airless Swim Jets
  • 45 Stainless Hydrotherapy Jets
  • 3 Powerful Pumps
  • Bluetooth Music System
  • Waterline LED mood lighting
  • LED Water Fountains and Cascade Waterfall
  • Xtreme Therapy Cove
  • Touchscreen Control Unit
  • CEC™ Approved for Maximum Energy Efficiency
  • Dry Weight: 1148kg
  • Full Weight: 8870kg
  • Water Capacity: 7306 Litres
  • Includes Cover, Lifter, Steps & Watercare Kit
  • Includes Mainland Delivery & Installation

About the Challenger 15D

The Challenger 15D is an elite performance swim spa that allows you to take your training to the next level. Challenger models feature an innovative jet system that does not introduce air in to the water stream. With VIP technology and six strategically placed jets that creates a smooth, wide current of water that can challenger a novice or elite swimmer with the press of a button. Plus, experience the hydrotherapy and relaxation that you want and need.

What is the Challenger 15 Best Suited For?

The Challenger range of Swim Spas are our best selling range of Swim Spas as they do everything well and with the various levels of adjustability they are suitable for all swimmers from novice through to elite performance. Combine this with a large swim area for water exercise its not hard to see why the Challengers are so popular. The Challenger models are all 60″ deep as standard which some customers feel are a little to deep for them so in this case we would recommend looking at our Trainer 15 which is slightly shallower at 51″ deep.

Proudly Built in America by Master Spas

Michael Phelps swim spas are manufactured by Global leading American hot tub manufacturer Master Spas. Based in Fort Wayne, Indiana and operating out of a state of the art 45 acre manufacturing campus, Master Spas are the largest portable spa and hot tub manufacturer that makes 100% of its spas and swim spas in the USA.

VIP Airless Jets

H2X Challenger models feature six air-injected VIP jets that create a smoother flow of water than traditional jetted swim spas. The water offers resistance so that you can enjoy a continuous exercise experience whether you swim, run, or walk. The unique design of the plate helps to control turbulence and the flow of water. By changing the way the water is released into the swim spa, you will experience a current that’s smoother, more efficient, and powerful.

SoftTread Nonslip Comfort Floor

The SoftTread Non Slip Floor System offers safety and comfort with the unique combination of traction and cushion. The flooring system offers grip for each movement, making exercises easier and more comfortable. SoftTread is applied to each entry and exit step as well as the large floor area.

Orion Lighting System

Our Orion LED light system is anything but ordinary. An array of colours illuminate under the water, around the waterline, the waterfall features, and more. With just the touch of a button from the easy to use control panel you can create a custom lightshow that fits any mood.

Bluetooth Sound System With Subwoofer

An incredible built in sound system that’s fully controllable from the easy to use remote control. With built in speakers and a subwoofer you can easily connect your smartphone or tablet via Bluetooth and enjoy listening to your favorite music collection whilst enjoying your swim spa session.

Stress Relief Neck and Shoulder Seat

After your swim you can sit back, relax and unwind in the StressRelief Neck and Shoulder Seat™. With specially designed out-of-water jets to deliver a tension-relieving massage where it’s needed most, across the neck and shoulders you also have hydrotherapy jets covering your back, hips and calves. It really is the ultimate hydrotherapy experience

Xtreme Therapy Cove

The jets of the Xtreme Therapy Cove deliver a complete therapeutic massage of your lower back, hips, thighs and calves. The warm water also improves circulation, delivering nutrients and oxygen to tired muscles. Ideal for recovering after a tough workout.

Colour Touchscreen Panel

With two state of the art touchscreen control panels you can easily adjust the temperature, control the hot tub and swim jets, set your LED mood lighting, rotate the screens and much more. By having a touchscreen positioned in both the swim area and hot tub area, controlling your swim spa is simple and user friendly

Class Leading Energy Efficiency

All of our hot tubs and swim spas exceed the strict standards set by the CEC (Californian Energy Commission). Very few spas or indeed manufacturers are able to meet these standards and Master Spas pride themselves on their high quality Icynene insulation which translates to low running costs for the hot tub owner.

Reduce energy costs

Reduce Your Energy Costs Now

Get 9kw for the price of 2kw!! Compatible
For All Master Spas Swim Spas

PAtented Hexagon

Patented Hexagon
Original patented hexagon from honeycomb, the largest combined space.

Intelligent touch screen

Intelligent touch screen
The nicely designed touch screen gives you at all times info on the status of your INVER-X.

Built-in wifi for free

Built-in wifi for free
Control your INVER X at anytime, anywhere.

Finance Calculator

Owning a hot tub has never been easier thanks to our range of finance packages and with no deposit required for any of our models you can be bubbling away in no time.

Applying for finance is quick and easy. Simply tailor your finance package to suit using our built in finance calculator and then hit apply for finance. You will be asked to fill in your basic contact details and our finance partner will then send you a secure link by email to complete your application. On approval you will be able to electronically sign your agreement.

Apply for Finance

Price £32995

  • Deposit: £

  • Representative Examples
Feefo logo