Challenger 21D
£1000 worth of upgrades including Premium steps, Insulated cover and Cover Lifter | Full Water Care Kit | Professional Free Delivery and Installation
£44,995.00£49,995.00
You Save £5,000.00 (10%)
Or available from £779.15 per month (based on 120 months BNPL plan at 16.90% APR) with Novuna Personal Finance
Challenger 21D
Original price was: £49,995.00.£44,995.00Current price is: £44,995.00.
TRADE IN
01382 530220
07437 489839
Features
Description
The Master Spas Challenger 21D is one of the most advanced dual-zone swim spas on the market, delivering unmatched performance, comfort and versatility. With separate, independently controlled swim and hot tub sections, it gives you the perfect balance of intense training and luxurious relaxation in one premium American-built unit.
Designed for athletes, families and wellness lovers alike, the Challenger 21D uses Master Spas’ state-of-the-art VIP Variable Speed Swim System, creating a smooth, powerful and fully adjustable current ideal for beginners through to experienced swimmers. Whether you’re training for fitness, low-impact rehab, or simply enjoying fun time with the family, you get world-class performance every time.
In the hot tub zone, you’ll find therapeutic seating, powerful hydrotherapy jets and beautiful LED lighting — crafted for deep relaxation after your swim session.
Why Customers Love the Challenger 21D
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Dual-zone swim spa: independent temperatures for swim & spa areas
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VIP Variable Speed Swim System: smooth, powerful, adjustable current
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Room for the whole family: spacious layout with premium seating
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Outstanding hydrotherapy: targeted jets for back, legs and full-body relief
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Energy-efficient construction: premium insulation keeps running costs low
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American-built quality: long-lasting, reliable and engineered for performance
The Ultimate Home Fitness & Wellness Experience
From daily workouts to post-training recovery, the Challenger 21D turns your garden into a complete fitness and relaxation retreat. It’s powerful, premium and built to deliver results — with the luxury you expect from Master Spas.
American Spas, American Prices
Why Buy American? Why Master Spas?
Every Master Spas hot tub we sell is designed and built at their own American factory — real American manufacturing, not just an American badge. Here's what that actually means for you.
Fort Wayne, IN
Headquarters & manufacturing home
45 Acres
State-of-the-art manufacturing campus
Designed & Built
Engineered and assembled in the USA
No. 1
Largest portable spa manufacturer in the world
Genuinely American-designed and built. Master Spas is the world's largest portable spa and hot tub manufacturer, engineering and assembling every spa at its own 45-acre campus in Fort Wayne, Indiana. As with most manufacturers, some individual components are sourced globally — but the design, engineering, assembly, and quality control all happen in-house, in America.
That matters: every spa is built and tested under one roof, to consistent American manufacturing standards, rather than outsourced to third-party assembly. It's also why Master Spas hot tubs meet the strict CEC (California Energy Commission) efficiency standards few manufacturers can achieve.
As an official UK retailer, we bring that same genuine American design and build quality to your garden — at a price that reflects buying direct from an authorised dealer, not an import markup.
Challenger 21D FEATURES
Proudly Built In America By Master Spas
VIP Airless Jets
SoftTread Nonslip Comfort Floor
Orion Lighting System
Bluetooth Sound System With Subwoofer
Stress Relief Neck and Shoulder Seat
Xtreme Therapy Cove
Colour Touchscreen Panel
Class Leading Energy Efficiency
19 Years of Delivery Experience
Difficult Access? We'll Find a Way.
We own our own HIAB for standard access jobs, and bring in larger hired cranes like this one for the trickiest lifts. Whatever your garden throws at us, access issues won't stop your hot tub getting exactly where you want it.
Our Own HIAB
For standard access jobs
Heavy Cranes
Hired in for tougher lifts
Into Place
Delivered & sited
Watch a recent installation
In this video, you’ll see the Grizzly Bear team in action as we guide you step by step through the installation process. Watch how we protect your property, safely maneuver and install your spa, and walk you through the essential features before we leave. Whether it’s your first hot tub or an upgrade, our professional installation means your investment is in expert hands—so all you have to do is sit back, relax, and enjoy your new spa.
