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Introducing the new J404L™ hot tub, a compact yet uncompromising addition to the J4™ Collection. Defined by clean lines, a distinctive contemporary profile and an illuminated infinity-edge waterfall, it brings an architectural presence to smaller spaces without sacrificing performance or refinement.
Its uniquely configured interior is centred around side-by-side loungers, creating a deeply immersive environment designed for focused relaxation. Every element has been carefully considered to maximise comfort, depth and precision in a reduced footprint.
Integrated SmartTub® connectivity provides intelligent control and monitoring, enhancing everyday ownership with seamless functionality.
True Water™ nanobubble technology comes as standard, producing beautifully clear water that is 99.9% chlorine-free and exceptionally soft to the touch.
The J404L™ stands among the most refined compact hot tubs available, delivering the same exacting standards of design, engineering and hydrotherapy as its larger counterparts.
The J404L™ features our exclusive Infrared + Red Light therapy system, integrating targeted Infrared heat into a dedicated therapy seat to complement powerful hydromassage. The J4™ Collection utilises two integrated Infrared emitters, focused on the lumbar region to deliver concentrated warmth to the lower back, while surrounding PowerPro® jets provide adjustable massage across the body.
Developed in collaboration with medical experts, Jacuzzi® Infrared and Red Light therapy is designed to maximise the clinically supported benefits of infrared treatment.
These benefits include:
Learn more about Jacuzzi® Infrared and Red Light therapy here
Engineered to deliver a deeply structured hydromassage experience, the J404L™ combines precision-placed Jacuzzi® PowerPro® jets with a seating layout designed for purposeful, full-body coverage.
The lounger provides continuous lower-body hydromassage, while upright seats target the back, lumbar and shoulders, creating distinct therapy profiles throughout the spa. Two Jacuzzi® PowerPro® MX jets positioned within the footwell deliver focused massage to the feet, enhancing lower-body coverage and introducing a reflexology-style experience.
A carefully calibrated mix of FX, FX-R, MX, NX and RX jet formations works across key muscle groups, producing a high-volume, low-pressure massage that feels smooth on the surface and deeply effective where it matters most.
At the core of every Jacuzzi® hot tub is our Aqualibrium® formula, balancing air and water through the ideal pump-to-jet ratio to ensure hydromassage remains powerful, consistent and refined in every seat.
Combining 70 years of world-leading innovation with advanced engineering, the J4™ Collection showcases patented Jacuzzi® jet technology designed for precision and reliability.
Hydrotherapy benefits include:
Learn more about our unique approach to hydrotherapy here
Through decades of engineering expertise, we’ve refined our approach to creating the most energy-efficient hot tubs available today. By combining advanced control systems, SmartSeal™ multi-layer insulation and precision manufacturing, Jacuzzi® continues to set the benchmark for energy-saving hot tubs.
Unlike other brands, Jacuzzi® can accurately provide estimated average running costs for each model using exclusive SmartTub® technology, based on real-world usage data.
All Jacuzzi® hot tubs undergo rigorous testing by the California Energy Commission (CEC), which has found that, on average, they perform 22% more efficiently than the strict standards they set out.
Using our SmartTub® app, we gather anonymised real-world usage data showing that the average Jacuzzi® UK customer consumes approximately 5 kWh per day – equivalent to a family of four taking a 10-minute shower daily.*
*All °C temperatures are rounded to the nearest whole degree. This information was collected over two years from UK Jacuzzi® hot tubs connected to SmartTub® energy monitoring. The data shown represent the median and are based on the recorded sample size.
Learn more about Jacuzzi® Energy Efficiency here
Built to the highest standards of quality and durability, every J4™ hot tub is supported by a comprehensive Parts and Labour warranty, giving you complete confidence in your investment for years to come.
Learn more about the J404L™ warranty here
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Unit 9, Vulcan Works, Floors Street
Johnstone, PA5 8QS
Unit 9, Vulcan Works, Floors Street, Johnstone, PA5 8QS
Heavenly Hot Tubs is a trading style of Heavenly Hot Tubs Group Ltd, Unit 9, Vulcan Works, Floors Street, PA5 8QS Reg. No. SC646725 and is authorised and regulated by the Financial Conduct Authority, FRN: 942123. Heavenly Hot Tubs is a credit broker and not a lender, and offers credit facilities from a panel of lenders. Credit is subject to status and affordability
Heavenly Hot Tubs is a trading style of Heavenly Hot Tubs Group Ltd, Unit 9, Vulcan Works, Floors Street, PA5 8QS Reg. No. SC646725 and is authorised and regulated by the Financial Conduct Authority, FRN: 942123. Heavenly Hot Tubs is a credit broker and not a lender, and offers credit facilities from a panel of lenders. Credit is subject to status and affordability
To purchase online:
1. Proceed to checkout and complete your order.
2. We’ll call you within 48 hours to schedule everything.
3. If you need installation, we’ll discuss options and arrange a site survey over the phone.
4. Your item(s) will be delivered hassle-free on your chosen date.
5. If you’ve opted for installation, this will be completed on the day of delivery.
Alternatively you can come visit one of ourshowrooms , call us or request a call back and we can arrange everything there and then including finance if desired.
If you’d like to have your hot tub installed, our expert engineers are available to get everything set up for you. Ahead of your installation date, we’ll arrange a site survey (usually completed by phone or video call) to ensure we can access your garden space and allow for a smooth installation.
Take a look at our customer installation reviews for examples of our recent work.
For some hot tubs, a Crane/Hiab may be required to move them into position depending on your access. This service comes at an additional charge and must be arranged with an external company. If you’re unsure where to start or would like a recommendation, our team will be happy to assist.
