The J-400™ Collection
Designed for total comfort and wellbeing
Designed for exceptional luxury and wellbeing
The J-400™ collection stands apart with its distinctive high-back design and adjustable headrests for added comfort. This flagship hot tub range delivers our most complete hydrotherapy experience through expertly positioned PowerPro® jets, paired with our exclusive Infrared + Red Light therapy for deeper, targeted relief. With its sweeping backlit waterfalls, premium lighting, and refined craftsmanship throughout, this distinguished designer collection offers a truly exceptional hot tub experience.
The J-400™ collection stands apart with its distinctive high-back design and adjustable headrests for added comfort. This flagship hot tub range delivers our most complete hydrotherapy experience through expertly positioned PowerPro® jets, paired with our exclusive Infrared + Red Light therapy for deeper, targeted relief.
With its sweeping backlit waterfalls, premium lighting, and refined craftsmanship throughout, this distinguished designer collection offers a truly exceptional hot tub experience.
J-300™ Features
J-400™ Features
Infrared + Red Light Therapy
Our groundbreaking FX-IR seat is designed to do more than massage. It pairs targeted hydromassage with Near-Infrared and Deep Red Light therapy, focusing on the lumbar region of the lower back to ease stiffness, relieve discomfort, and support greater flexibility and wellbeing.
PowerPro® Jet Technology
Recognised as the most advanced jet technology, Jacuzzi® PowerPro® jets combine high flow with low pressure to deliver a deeper, more comfortable hydromassage. Each jet and placement is precisely engineered to target specific muscle groups for an unparalleled level of performance and relief.
Peace Of Mind From Anywhere
Patented SmartTub® technology technology makes it simple to control and care for your spa from anywhere. Adjust settings, track energy use, and receive alerts straight to your device for convenience, confidence, and complete peace of mind.
Clean* Water, Less Effort
UV-C technology is at the heart of our exclusive CLEARRAY® water management system. By harnessing the natural power of light, CLEARRAY® helps keep water clean and clear, reducing chemical dependency by up to 50%.
J-400™ Hot Tubs
BROWSE THE J-300™ COLLECTION
J-300™ Inspiration Gallery
J-400™ Inspiration Gallery
Explore Other Collections
Explore Other Collections
J-LX® Collection
Sleek and uncomplicated design encapsulates our latest product range. Elevating hydrotherapy to new heights, our patented Infrared and Red Light therapy set us apart, putting us at the forefront of the industry, and delivering the ultimate wellness journey.
J-300™ Collection
Now featuring Infrared and Red Light therapy, this signature collection combines exclusive ergonomic design with our most advanced hydrotherapy system for even deeper relief – exactly where you need it most.
J-200™ Collection
Step into Jacuzzi® luxury with our New J-200™ hot tubs, featuring a fresh design and the renowned reliability and excellence of Jacuzzi® at an affordable price. Plus, each new model is now equipped with exclusive premium features such as CLEARRAY Active Oxygen™ and SmartTub® system.
FAQ
True Water™ is Jacuzzi®’s latest breakthrough in water care. Using trillions of microscopic nanobubbles filled with oxygen, it continuously lifts away contaminants and helps keep your spa water clean, soft, and inviting. Unlike traditional systems, True Water™ achieves this while being 99.9% chlorine-free, so you enjoy a more natural soak with less effort and fewer harsh chemicals.
This groundbreaking new system is available as an optional extra on the J-435™, J-475™, and J-495™.
You can read more about how it works here: True Water™
Infrared + Red Light therapy is a revolutionary patented wellness feature built into the FX-IR seat of the J-400™ range. It combines hydrotherapy with two kinds of light: Near-Infrared light that penetrates deep into muscle tissue (especially the lower back), and Deep Red Light, which works closer to the skin to boost surface healing. The lights warm tissue and can ease tension, improve circulation, and help reduce inflammation. Together, they can enhance flexibility, relieve discomfort, and speed up post-workout recovery.
Learn more here: Infrared + Red Light therapy
SmartTub® is more than an app – it’s a complete management system for your hot tub. From your smartphone or connected device, you can adjust temperature, jets, and lighting, set routines, and even lock the spa when not in use. SmartTub® also provides energy tracking tools and features like Vacation Mode, which can reduce standby energy use by up to 25%. Beyond convenience, it adds peace of mind by sending alerts, reminders, and diagnostic updates directly to you or your retailer. This means less guesswork in looking after your spa and more confidence that it’s always running at its best.
Find out more here: SmartTub® energy saving
Every J-400™ model is engineered for year-round efficiency. Multi-layer SmartSeal™ insulation keeps the heat in, while durable ProLast® covers prevent unnecessary heat loss. SmartTub® takes things further by letting you monitor your energy use in real time, schedule heating for off-peak hours, and switch to Vacation Mode when you’re away. Together, these features help lower running costs without compromising performance, so your spa is always warm, ready, and cost-effective to run.
If you’re looking for the most premium combination of design and performance, the J-400™ Collection is worth serious consideration. The range offers different layouts and sizes to suit different homes and lifestyles — from the compact J-435™ to the spacious J-495™. Distinctive styling, advanced hydrotherapy, and innovations like the True Water™ system set it apart.
If you’re unsure where to begin, our digital Buyer’s Guide is a helpful resource for planning your purchase: guide.jacuzzi.co.uk
Yes. We have a nationwide network of specialist retailers with showrooms where you can explore the J-400™ Collection in person. Many showrooms also offer the chance to book a wet test, so you can feel the difference of PowerPro® jets, try the FX-IR therapy seat, and experience the range of Jacuzzi® hot tubs before making a decision.
Find your nearest showroom here: Find a Dealer