J404L™
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3-4 Seats (Open Seating + Lounger)
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True Water™ Nanobubble System
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Exclusive Infrared + Red Light Therapy
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SmartTub® Cellular Control and Remote Monitoring
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6-Stage Filtration with ProStream™ Pump
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Jacuzzi® High Efficiency, Multi-Layered Insulation
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Industry-Leading Manufacturer Warranty (Parts and Labour)
DETAILS
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.
Features Include:
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Patented PowerPro® hydrotherapy jets
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Preset hydromassage levels
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ProTouch™ touchscreen control
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BLUEWAVE® surround sound
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Illuminated waterfall
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Interior and exterior LED lighting
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SmartSeal™ insulation system
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Hybrid galvanised steel frame
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Heat-pump ready design
J4™ THERAPY
INDUSTRY-LEADING HYDROTHERAPY
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:
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Pain relief: Helps increase circulation to support muscle and joint comfort.
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Improved skin health: Encourages collagen production and skin elasticity.
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Repairing properties: Supports natural tissue repair and cellular renewal.
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Wellbeing: Promotes relaxation, improved mood and better sleep quality.
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Improved range of motion: Helps muscles feel looser and more flexible.
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Regeneration: Encourages healthy cellular activity and energy production.
The J404L™ delivers a deeply immersive hydromassage experience centred around its dual side-by-side loungers, creating focused full-body coverage. Carefully positioned Jacuzzi® PowerPro® jets target the back, shoulders and legs with controlled intensity, while dedicated reflexology jets in the footwell enhance lower-body stimulation.
A calibrated blend of FX, FX-R, MX and RX jet formations works across key muscle groups to produce a high-volume, low-pressure massage that feels smooth on the surface and purposeful in delivery.
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.
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:
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Muscle relaxation: Helps ease tension and muscular stiffness.
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Joint comfort: Supports reduced impact on joints during movement.
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Improved circulation: Encourages healthy blood flow.
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Stress reduction: Promotes relaxation and overall wellbeing.
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Better sleep: Supports improved sleep quality.
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Mobility support: Helps maintain flexibility and range of motion.
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Skin cleansing: Warm water immersion helps open pores.
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Reduced muscle tightness: Supports post-activity comfort.
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Mental clarity: Encourages focus and relaxation.
J404L™ COLOUR OPTIONS
CABINET OPTIONS
SHELL OPTIONS
Brushed Grey
Platinum
Smoked Ebony
True Water™
99.9% chlorine free – True Water™ delivers cleaner, softer water using breakthrough nanobubble technology to lift contaminants and help maintain clarity with minimal effort. This revolutionary system redefines water care.
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.
J4™ ENERGY EFFICIENCY
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.
J4™ WARRANTY
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.
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10 Years Shell Structure
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7 Years Shell Surface
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3 Years Equipment and Controls
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3 Years Plumbing and Components
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5 Years Cabinet
J404L™ SPEC
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Dry Weight: 313 kg
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Jets: 32
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Primary Pump: 1 x 2-speed 2.0 HP
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Circulation Pump (Y/N): Yes
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Filtration System: 5-stage filtration
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Electrical: 32A
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Filter Type: 5-stage filtration
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Waterfalls: 1
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Water Management System: True Water®
J404L™ DIMENSIONS
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Height (cm): 84.0
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Length (cm): 176.0
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Width (cm): 214.0
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Filled Weight (kg): 1222.0
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Volume (Litres): 909.0