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hs40
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hs40

The HydroFLOW® HS40 is a powerful water conditioner designed for larger residential and commercial applications. It treats limescale, prevents buildup and helps keep systems efficient, even in tough hard-water conditions.

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The HydroFLOW® HS40 is built for medium to large homes and light commercial sites that demand stronger protection against hard water. Using HydroFLOW®’s patented technology, it treats limescale, prevents new deposits from forming throughout the plumbing system. With its easy clamp-on design, it requires no pipe cutting or alterations and works on both hot and cold water systems.

Features

  • Up to 63 mm OD (≈ 2.5”)

  • Suitable for heavy domestic, light commercial systems

  • Has option for plug-in or hardwired installation. No pipe cutting needed.

Related products

Residential Product
Suitable for up to 3 bathrooms
Suitable for Pipe Sizes up to 63mm
3-year Manufacturer’s Guarantee
Kinder to Skin and Hair

Stronger Protection for Larger Systems

The HS40 emits a powerful signal that covers bigger pipework, making it suitable for larger homes and light commercial environments.

Protects Your Applicances

Protects Your Appliances

By keeping heating systems and hot water appliances clear of scale, the HS40 improves performance and reduces unnecessary energy use.

Kinder to Skin and Hair

Effective in Hard Water Areas

Ideal for regions with high limescale, the HS40 treats limescale buildup and prevents new scale deposits in pipes, boilers, and appliances.

Keep Healthy Minerals in Water

Improves System Efficiency

By keeping scale from building up inside boilers and heating systems, the HS40 helps equipment run more smoothly and reduces wasted energy.

Protects Your Applicances

Maintenance Free

No salt. No filters. No refills. Simply fit the unit around your existing pipe and plug it in. The HS40 works continuously in the background with no ongoing maintenance.

Kinder to Skin and Hair

Eco Friendly and Safe

HydroFLOW® treats your water without altering its natural composition. It is safe to drink, safe for pets, and does not produce any chemical discharge or waste.

Reasons to Buy HydroFLOW® for Your Home

CHEMICAL-FREE WATER TREATMENT

Enjoy effective limescale protection without adding salt or harsh chemicals to your water.

LOW MAINTENANCE

No filters, no servicing, no hassle, just fit and forget.

NO COSTLY REFILLS

Unlike traditional softeners, there’s nothing to top up or replace regularly

ECO-FRIENDLY SOLUTION

Save water, reduce waste, and protect the environment with a sustainable treatment method..

Proudly Made in Britain

Engineered and manufactured in the United Kingdom. Trusted worldwide

  • Every HydroFLOW® unit is designed, built, and tested at our UK facility — upholding the global reputation of British manufacturing for trust, precision, and performance.

Certified to meet rigorous international standards

  • We adhere to strict ISO guidelines, CE marking requirements, and NRTL approval standards, so you can be confident in our product’s safety, durability, and compliance.

Full traceability across our entire production chain

  • From design to delivery, every stage is traceable and documented — supporting transparency, quality assurance, and accountability.

Committed to sustainable and ethical manufacturing

  • We prioritise environmentally responsible processes, reduce waste, and embrace long-term sustainability to minimise our impact on the planet.

Residential Product Comparison

Feature
HydroFLOW Pearl unit HydroFLOW® Pearl Best for small homes and flats
HydroFLOW Pearl Plus unit HydroFLOW® Pearl Plus Best for larger homes and cottages
HydroFLOW HS40 unit HydroFLOW® HS40 Best for large properties and light commercial
Application Residential (small homes, flats) Residential (larger homes, cottages) Residential / light commercial
Pipe size compatibility Up to 24 mm (0.9") Up to 41 mm (1.5") Up to 63 mm (2.5")
Typical property size 1 to 3 bathrooms Three plus bathrooms or high demand homes Very large domestic properties, commercial sites, pools
Installation No plumbing needed No plumbing needed No plumbing needed
Power supply Standard 110–240 V (low wattage)
A – Hardwired 3 A fused spur (Contact us)
B – UK plug transformer (Buy Now) 		Standard 110–240 V (low wattage)
A – Hardwired 3 A fused spur (Contact us)
B – UK plug transformer (Buy Now) 		Standard 110–240 V (low wattage)
A – Hardwired 3 A fused spur
B – UK plug transformer
Water types Hot and cold water system Hot and cold water systems Suitable for high flow systems
Limescale treatment ✓ ✓✓ ✓✓✓
Signal strength Standard Enhanced High output
Recommended use Apartments, small homes Larger homes, small guesthouses Calorifiers (hot water storage tanks), large steam ovens
Purchase options View Pearl in store View Pearl Plus in store View HS40 options
HydroFLOW Pearl unit
HydroFLOW® Pearl
Best for small homes and flats
Application
Residential (small homes, flats)
Pipe size compatibility
Up to 24 mm (0.9")
Typical property size
1 to 3 bathrooms
Installation
No plumbing needed
Power supply
Standard 110–240 V, low wattage.
A – Hardwired 3 A fused spur (Contact us)
B – UK plug transformer (Buy now)
Water types
Hot and cold water system
Limescale treatment
✓
Signal strength
Standard
Recommended use
Apartments and small homes
Purchase options
View Pearl in store
HydroFLOW Pearl Plus unit
HydroFLOW® Pearl Plus
Best for larger homes and cottages
Application
Residential (larger homes, cottages)
Pipe size compatibility
Up to 41 mm (1.5")
Typical property size
Three plus bathrooms or high demand homes
Installation
No plumbing needed
Power supply
Standard 110–240 V, low wattage.
A – Hardwired 3 A fused spur (Contact us)
B – UK plug transformer (Buy now)
Water types
Hot and cold water systems
Limescale treatment
✓✓
Signal strength
Enhanced
Recommended use
Larger homes and small guesthouses
Purchase options
View Pearl Plus in store
HydroFLOW HS40 unit
HydroFLOW® HS40
Best for large properties and light commercial
Application
Residential and light commercial
Pipe size compatibility
Up to 63 mm (2.5")
Typical property size
Very large domestic properties, commercial sites and pools
Installation
No plumbing needed
Power supply
Standard 110–240 V, low wattage. Hardwired 3 A fused spur or UK plug transformer.
Water types
Suitable for high flow systems
Limescale treatment
✓✓✓
Signal strength
High output
Recommended use
Calorifiers (hot water storage tanks) and large steam ovens
Purchase options
View HS40 options