The SDE-025 UV Sterilizer is a high-performance 25-watt stainless steel ultraviolet water sterilizer designed for whole-house or light commercial applications. It provides chemical-free disinfection by destroying 99.99% of harmful bacteria, viruses, and parasites without altering the taste or smell of your water.

Key Features:

• Sterilizes up to 1,360 litres per hour
• Durable stainless steel housing for long-term reliability
• 25W UV lamp delivers powerful disinfection
• Eco-friendly – no chemicals or additives
• Maintains the natural flavour and clarity of water
• Suitable for homes, guesthouses, small lodges, and water systems using tanks or boreholes

Dimensions:

• Complete unit: 600mm
• Bulb length: 550mm
• Quartz sleeve: 580mm

How Does Ultra Violet Light Work?

UV rays can destroy 99.99% of harmful micro-organisms without adding chemicals or changing your water’s taste or odour. UV light (254nm wavelength) effectively neutralizes bacteria, viruses, and parasites by damaging their DNA, stopping them from reproducing and causing infection.

Water flows through a specially designed stainless steel chamber, allowing direct contact with the UV light. In addition to destroying pathogens, the energy from UV rays breaks down organic compounds into safer molecules.

The effectiveness of UV sterilization depends on:

• The exposure time of micro-organisms to the UV rays

• Power stability of the UV lamp

• Clarity of water (filtered water is ideal)

• The size of the UV unit relative to flow rate

For optimal results, always pre-filter your water using a sediment filter before UV treatment.

Ultraviolet Sterilizer Use Information:

An ultraviolet sterilizer:

• Neutralizes bacteria such as E.coli and parasites like Cryptosporidium and Giardia
• Can be added to existing whole-house water filtration systems
• Is easy to install and maintain
• Is widely used in domestic, commercial, and light industrial setups
• Is essential after filtration in areas with contaminated water to protect against diseases such as Salmonella, Hepatitis, Typhoid, Polio, and Dysentery

Technical Specifications:

• Power consumption: 25 watts
• Maximum flow rate: 1,360 litres per hour
• Port size: 15 mm (½ inch BSP)
• UV wavelength: 254nm
• Material: Stainless steel chamber
• UV lamp replacement: Every 12 months

What You Get:

• 1 x Stainless Steel Housing (600mm in length)
• 1 x 25 Watt UV lamp (550mm in length)
• 1 x Quartz glass sleeve (580mm in length)
• 1 x Ballast (transformer) for 220V power supply
• 2 x O-rings
• 2 x Plastic mounting brackets (for wall or top mounting on Big Blue filter brackets)

This UV sterilizer is a reliable, low-maintenance, and environmentally safe way to protect your water supply—ideal for residential and small-scale commercial applications.

Parts and Consumables:

• 25W UV light Bulb (Replace every 12 months) 550mm in length
• 25W UV Ballast (Spare)
• 25W UV Glass Sleeve (Spare) 580mm in length

Disclaimer: Have your water tested before installing the uv light to ensure that it is the right solution and if any pre-treatment is required. It is important to have your water tested regularly after installation and to change the lamp at the recommended intervals to ensure the effective working of the unit.

The EB-G28 ballast is designed for 25-watt UV sterilizer lamps operating on 220V AC power, featuring a waterproof nut for secure connection to 4-pin UV bulbs. This ballast provides stable power supply and includes built-in safety alarms to ensure your UV sterilizer operates efficiently and reliably.

Product Features

• Power: 220V AC

• Compatible with: 25 Watt UV lamps with 4-pin bulbs

• Waterproof Nut: Ensures a secure, water-resistant connection for enhanced durability and safety

• Alarm System: Audible sound alarm signals any faults or malfunctions

• Indicator Lights:

  • Green Light: Indicates normal operation

  • Red Light: Warns of fault or failure

• Application: Suitable for domestic, commercial, and industrial UV sterilizer systems requiring waterproof electrical components

How Does Ultra Violet Light Work?

UV rays can destroy 99.99% of harmful micro-organisms without adding chemicals or affecting water taste or odour. Ultraviolet light (UV) is a natural component of sunlight and is widely trusted as a reliable, efficient, and environmentally friendly method for water disinfection. The UV lamp emits radiation at a 254nm wavelength to quickly kill pathogens and prevent their reproduction.

Water is passed through a specially designed chamber where it is exposed directly to UV light. Microorganisms absorb the UV energy, damaging or inactivating their DNA, which stops them from reproducing. Additionally, chemicals and organic compounds break down into smaller, harmless molecules.

Factors Affecting UV Effectiveness

• Duration of microorganism exposure to UV light

• Stability and power consistency of the UV lamp

• Presence of particles shielding microorganisms from UV exposure

• Resistance of microorganisms to UV radiation

For best results, always filter water before UV sterilization to remove particles that may block UV penetration. It’s also crucial that the UV sterilizer is correctly sized for your maximum water flow rate to guarantee effective purification.

Other items you may be interested in:

25W UV Sterilizer

25W UV light Bulb (Replace every 12 months) 550mm in length

25W UV Glass Sleeve (Spare) 580mm in length

The UVT5-425 is a high-output 25 Watt 4-pin replacement bulb designed for stainless steel UV sterilizer housings. This efficient ultraviolet-C lamp emits germicidal light at a wavelength of 254nm, making it ideal for disinfecting water in domestic, commercial, and industrial UV filtration systems.

Product Features

• Wattage: 25 Watts

• Type: 4-Pin UV-C Replacement Bulb

• Length: 550mm

• Wavelength: 254nm

• Compatibility: Fits most standard 25W stainless steel UV sterilizer housings

• Application: Used inside the quartz sleeve of UV disinfection chambers

How Does Ultra Violet Light Work?

UV rays can destroy 99.99% of harmful micro-organisms without adding chemicals or changing your water’s taste or odour. Ultraviolet light (UV) is a natural part of sunlight and is widely accepted as a reliable, efficient, and environmentally friendly solution for water disinfection. The UV lamp uses a 254nm wavelength to cause immediate death to organisms and eliminate their ability to reproduce.

The water is exposed to UV radiation in a specially designed chamber that provides intimate contact of the water with the UV light source. Bacteria and other living organisms absorb the energy, which destroys or inactivates their DNA, thus preventing the bacteria from reproducing. Similarly, chemicals and organic compounds also absorb the energy and are broken down into smaller and more harmless molecules.

The effectiveness of UV light depends on several factors:

• The length of time a micro-organism is exposed to UV

• Power fluctuations affecting the UV source

• The presence of particles that shield micro-organisms from UV

• A micro-organism’s ability to withstand UV radiation

It is essential to filter water before it passes through the UV sterilizer to remove particulates and ensure full exposure to UV light. Always ensure your UV unit is correctly sized for the system’s maximum flow rate.

Other items you may be interested in:

• 25W UV Sterilizer (550mm in length)
• 25W UV Glass Sleeve (Spare) 580mm in length
• 25W UV Ballast (Spare)

The SIL-70 O-Ring is a high-quality, silicone rubber sealing ring designed to create a watertight seal between the quartz sleeve and UV chamber in UV sterilizer systems. It plays a crucial role in preventing leaks and ensuring optimal performance of your UV disinfection unit.

Product Overview

Crafted from durable SIL-70 grade silicone, this O-ring offers excellent resistance to heat, chemicals, and UV exposure. It is specially engineered to maintain a tight seal around the quartz sleeve, helping protect the UV lamp and maintain the integrity of your water sterilization system.

Key Features

• Premium Silicone Material
  Made from SIL-70 silicone, known for its flexibility, strength, and resistance to temperature fluctuations.
• Leak-Proof Sealing
  Ensures a tight, reliable seal between the quartz sleeve and UV chamber, preventing water ingress into the UV lamp compartment.
• UV and Chemical Resistant
  Designed to withstand prolonged exposure to ultraviolet light and disinfectants without degrading or cracking.
• Easy to Install and Replace
  A simple, quick-fit design allows for easy maintenance and periodic replacement as part of your UV system servicing routine.
• Compatible with Most UV Sterilizers
  Fits standard quartz sleeves used in residential and light commercial UV sterilizer systems.

Other UV sterilizer consumables

Overview

The M32*2-B waterproof nut is a durable cable gland designed to provide a secure, watertight seal for electrical connections in UV sterilizers and water treatment systems. It protects internal components from moisture, dust, and debris, ensuring safe and long-lasting operation. This fitting is commonly used with UV units to seal power cable entries where reliability and waterproofing are critical.

Key Features

• Strong waterproof seal for cables and electrical enclosures

• Ideal for use with UV sterilizers and water treatment equipment

• Easy to install and compatible with standard cable sizes

• Made from high-quality, corrosion-resistant materials

• Reliable performance in wet or humid environments

Other items you may be interested in:

12W ballast

25W ballast

55W ballast

The QT5-580 is a durable quartz sleeve designed for 25 Watt UV sterilizers. Measuring 580mm in length, it safeguards the UV lamp from direct contact with water while maintaining maximum UV-C light transmission. Made from high-transmittance quartz glass, this sleeve ensures efficient water sterilization by allowing the full UV spectrum to pass through without obstruction.

Product Features

• Length: 580mm

• Material: High-purity quartz glass

• Compatibility: Designed for 25W UV lamps

• Function: Shields the UV lamp from water while enabling optimal UV penetration

• Maintenance: Recommended cleaning during lamp replacement to remove any mineral or sediment build-up

How Does Ultra Violet Light Work?

UV rays can destroy 99.99% of harmful micro-organisms without adding chemicals or changing your water’s taste or odour. Ultraviolet light (UV) is a natural part of the sunlight and is widely accepted as a reliable, efficient and environmentally friendly solution for water disinfection. The UV lamp utilizes a particularly efficient UV radiator with a 254nm wavelength to cause immediate death to organisms and wipe out their ability to survive and reproduce.

The water is exposed to UV radiation in a specially designed chamber that provides intimate contact of the water with the UV light source. Bacteria and other living organisms absorb the energy, which destroys or inactivates their DNA, thus preventing the bacteria from reproducing. Similarly, chemicals and organic compounds also absorb the energy and they are broken down into smaller and more harmless molecules.

The effectiveness of UV light depends on a number of factors:

• The length of time a micro-organism is exposed to UV

• Power fluctuations of the UV source that impact the EM wavelength

• The presence of particles that can shield micro-organisms from UV

• A micro-organism’s ability to resist UV exposure

It is advisable to always filter the water before it passes through the UV system to remove loose particles. Keeping the quartz sleeve clean ensures maximum UV light transmission and overall disinfection efficiency.

Other items you may be interested in:

• 25W UV Sterilizer
• 25W UV light Bulb (Replace every 12 months) 550mm in length
• 25W UV Ballast (Spare)

Special price only applies when you place the order online for delivery!

3 Stage Big Blue Water Filtration System With 25W UV Sterilizer, Sediment Filters & Carbon Filter (Whole House, 20 Inch) Steel Bracket 

3 Stage Big Blue Water Filtration System With 25W UV Sterilizer, Sediment Filters & Carbon Filter (Whole House, 20 Inch) Aluminium/Stainless Steel Bracket

The CBB-4N-25W is a complete whole-house water purification system combining multi-stage filtration with efficient ultraviolet (UV) sterilization. Featuring three 20-inch Big Blue filter housings mounted on a sturdy aluminium/stainless steel bracket, plus a reliable 25W stainless steel UV sterilizer, this system removes sediment, chemicals, and harmful microorganisms to deliver safe, clean, and great-tasting water throughout your home.

Key Features:

• Four-stage water purification for whole-house protection

• Stage 1: 50-micron sediment filter removes large particles such as sand, rust, and silt

• Stage 2: Carbon block filter reduces chlorine, chemicals, odours, and organic compounds

• Stage 3: 5-micron sediment filter removes finer particles for clearer water

• Stage 4: 25W stainless steel UV sterilizer destroys bacteria, viruses, and pathogens without chemicals

• Suitable for municipal and borehole water (borehole use requires water analysis submission)

• Aluminium/stainless steel bracket offers lightweight durability and easy installation (Bracket choice is dependent on availability)

• Filtration stages require no electricity; UV sterilizer requires power

• Ideal for whole-house installation, ensuring clean, microbiologically safe water at every tap

Stages of Water Treatment:

• Stage 1: 50-micron sediment filter traps coarse debris, protecting downstream filters and plumbing

• Stage 2: Carbon block filter removes chlorine, bad tastes, odours, pesticides, and volatile organic compounds (VOCs)

• Stage 3: 5-micron sediment filter captures fine particles for polished water clarity

• Stage 4: 25W UV sterilizer inactivates bacteria, viruses, and other pathogens for microbiologically safe water

Sterilization Filter Details:

This system’s sterilization filter is a stainless steel UV light unit designed to disinfect your water efficiently and naturally. UV rays can destroy 99.99% of harmful micro-organisms without adding chemicals or altering your water’s taste or odour. Ultraviolet light is a natural component of sunlight and is widely recognized as an effective, environmentally friendly solution for water disinfection.

The UV lamp operates at a wavelength of 254 nm, using a highly efficient UV radiator that kills microorganisms by disrupting their DNA. Water passes through a specially designed chamber ensuring intimate contact with the UV light. Bacteria and other living organisms absorb the UV energy, which destroys their ability to survive and reproduce. Additionally, chemicals and organic compounds absorb the UV energy and break down into smaller, harmless molecules, improving overall water quality.

Technical Specifications:

• Maximum pressure: 6 bar
• Maximum flow rate: 1360 litres per hour
• Big Blue filter housing port size: 25 mm (1 inch BSP)
• UV sterilizer housing port size: 15 mm
• Power consumption UV: 25 watts

What’s Included:

• 3 x 20-inch Big Blue filter housings

• 1 x 50-micron sediment filter cartridge

• 1 x Carbon block filter cartridge

• 1 x 5-micron sediment filter cartridge

• 1 x 25W stainless steel UV sterilizer unit

• 1 x Aluminium/stainless steel mounting bracket with screws (Bracket choice is dependent on availability)

• 1 x Wrench for easy filter maintenance

• Unitwist plumbing fittings to connect the 3 stage Big Blue housing with UV sterilizer (as shown in display picture)

The CBB-4N-25W delivers effective whole-house water treatment by combining sediment and chemical filtration with powerful UV sterilization, all mounted on a lightweight aluminium bracket for durability and easy installation. This system ensures safe, clear, and microbiologically clean water at every tap in your home.

**Please note:  Due to this product being couriered, the UV light is not pre-installed on the system due to the fragile nature of the UV bulb. Installation is required.

Disclaimer: Big blue filters are intended for fine filtration and limits apply to water quality and quantity. Have your water tested before installing a big blue filter to ensure that it is the right solution. It is important to note that the volume of water put through the unit as well as the quality of the water will greatly influence the lifetime of the filters