Description

LED UV Water Steriliser 4 LPM – 12V DC & 240V AC

The UV Guard LED-4R is a compact LED UV water steriliser designed for drinking water applications with flow rates of up to 4 litres per minute (LPM).

With flexible 12–24V DC and 240V AC operation, the LED-4R is an ideal UV water disinfection solution for homes, under-sink drinking water systems, caravans, RVs, boats and off-grid applications.

Unlike traditional UV systems that use mercury lamps, the LED-4R uses modern UV LED technology to provide instant UV output without a conventional mercury UV lamp or warm-up period.

Compact LED UV Water Sterilisation for Drinking Water

The UV Guard LED-4R is designed for applications where reliable UV disinfection is required but space is limited.

With a maximum flow rate of 4 LPM, the system is particularly suited to a dedicated drinking water tap or low-flow water outlet rather than whole-house water treatment.

As water passes through the UV treatment chamber, UV light is used to inactivate microorganisms in the water.

The compact design and flexible power options make the LED-4R suitable for:

• Under-sink drinking water systems
• Kitchen drinking water taps
• Caravans and RVs
• Boats
• Tiny homes
• Off-grid properties
• Rainwater tank drinking water systems
• Bore water drinking water applications
• Other low-flow drinking water applications

Why Choose the UV Guard LED-4R?

The LED-4R combines compact design, low power consumption and modern UV LED technology in a system designed specifically for low-flow drinking water applications.

4 LPM UV Water Steriliser

The LED-4R has a maximum recommended flow rate of 4 litres per minute.

This makes it well suited to applications such as a dedicated drinking water tap, filtered drinking water system or other low-flow outlet.

12–24V DC & 240V AC Operation

One of the key advantages of the LED-4R is its flexible power supply.

The unit can operate from a 12–24V DC power supply and is also supplied with a 240V AC power adaptor.

This makes the LED-4R suitable for both fixed and mobile applications, including:

• Residential installations
• Caravans
• RVs
• Boats
• Solar-powered systems
• Off-grid applications

Automatic Flow Switch

The LED-4R incorporates an automatic flow switch that activates the UV system when water is being drawn.

When water flow stops, the system switches off.

This allows the UV LED system to operate only when water is being used rather than continuously.

Instant UV Output

Traditional UV water sterilisation systems generally use mercury UV lamps that may require a warm-up period.

The LED-4R uses UV LED technology, providing UV output almost immediately when activated.

This makes the system particularly suitable for applications where water is used intermittently.

Mercury-Free LED Technology

The LED-4R does not use a conventional mercury UV lamp.

Instead, it uses UV LED technology housed within the compact treatment system.

This eliminates the need for a traditional glass UV lamp and makes the system well suited to mobile applications where compactness and durability are important.

Compact Design

The LED-4R has been designed for installations where available space is limited.

Its compact design makes it suitable for installation under a kitchen sink, inside a caravan or RV, or in other confined areas where a conventional UV system may not be practical.

Ideal for Homes, Caravans, RVs & Off-Grid Applications

The combination of 12–24V DC operation, 240V AC compatibility and compact construction makes the LED-4R a versatile drinking water UV steriliser.

Caravan & RV UV Water Steriliser

The LED-4R is particularly well suited to caravans and RVs.

Its 12–24V DC operation allows it to be connected to a suitable DC electrical system, while the supplied 240V AC adaptor provides an option for mains-powered operation when available.

The 4 LPM flow rate is suitable for dedicated drinking water applications without requiring the larger equipment associated with whole-house UV systems.

Under-Sink UV Water Steriliser

The compact LED-4R can be installed as part of an under-sink drinking water filtration system.

A typical installation can combine sediment and carbon filtration with UV treatment before supplying water to a dedicated drinking water tap.

The LED-4R should be installed after appropriate pre-filtration so that the water entering the UV chamber meets the required water-quality conditions.

UV Water Steriliser for Rainwater

The LED-4R can be incorporated into a drinking water treatment system supplied by rainwater tanks, provided the incoming water quality is suitable for UV treatment.

Rainwater systems can contain sediment and other contaminants that may interfere with UV transmission.

Appropriate filtration and water-quality assessment should therefore be considered before installing UV treatment.

Bore Water UV Treatment

The LED-4R can also form part of a drinking water treatment system supplied by bore water.

Bore water quality can vary significantly, so testing should be considered to determine whether additional treatment is required before UV disinfection.

Iron, manganese, hardness, turbidity and other water-quality parameters can affect UV system performance.

How LED UV Water Disinfection Works

UV water disinfection uses ultraviolet light to treat microorganisms in water as it passes through the UV chamber.

The LED-4R generates UV light using UV LED technology. When water flows through the treatment chamber, microorganisms are exposed to the UV light.

UV treatment is a disinfection process and does not rely on adding chemicals to the water.

It is important to understand that UV treatment does not remove sediment, dissolved chemicals, minerals or hardness from water.

For this reason, suitable pre-filtration should be installed before the UV system where required.

Key Features of the LED UV Water Steriliser

• Maximum flow rate of 4 LPM
• 12–24V DC operation
• 240V AC power adaptor supplied
• Automatic flow switch
• UV LED technology
• Instant UV output
• No conventional mercury UV lamp
• No warm-up period
• Compact design
• Suitable for under-sink applications
• Suitable for caravans and RVs
• Suitable for boats and off-grid applications
• ¼” push-fit water connections
• Stainless-steel mounting bracket
• Built-in LED operating-life timer
• Up to approximately 5,000 hours operating life

LED-4R Technical Specifications

Specification	Details
Product	UV Guard LED-4R
Technology	LED UV water disinfection
Maximum Flow Rate	4 LPM
Input Voltage	12–24V DC
AC Power	240V AC adaptor supplied
Power Consumption	Approximately 8W
Water Connections	¼” push-fit
Flow Switch	Automatic
Operating Temperature	0–45°C
Maximum Pressure	4–6 bar / 400–600 kPa
UV Transmittance	>90%
LED Operating Life	Up to 5,000 hours
Mounting	Stainless-steel mounting bracket
Application	Drinking water / low-flow applications

Water Quality Requirements & Pre-Filtration

Correct water quality is essential for UV treatment.

UV light needs to pass through the water effectively. High levels of turbidity, sediment, colour or other contaminants can reduce UV transmission and potentially affect the effectiveness of UV treatment.

The water entering the LED-4R should be pre-filtered to 5 microns or better.

Recommended water-quality parameters include:

• Turbidity: less than 1 NTU
• UV transmittance: greater than 90%
• Iron: less than 0.3 mg/L
• Manganese: less than 0.05 mg/L
• Tannins: less than 0.1 mg/L
• Hardness: less than 120 mg/L
• Water temperature: 0–45°C

If you are treating rainwater, tank water, bore water or another untreated water supply, water testing should be considered before selecting the appropriate treatment system.

Why Pre-Filtration Is Important

Sediment and suspended particles can absorb or block UV light and prevent the UV treatment from working as intended.

A suitable sediment filter installed before the LED-4R helps reduce these particles before the water reaches the UV chamber.

Carbon filtration may also be used where required to improve taste, odour or other water-quality characteristics.

LED UV vs Traditional Mercury UV Lamps

The LED-4R uses UV LED technology rather than a traditional mercury UV lamp.

This provides several advantages for low-flow drinking water applications:

• Instant UV activation
• No lamp warm-up period
• No conventional glass UV lamp
• Mercury-free LED technology
• Well suited to frequent on/off operation
• Low power consumption
• Compact design

This makes LED UV technology particularly attractive for caravans, RVs, boats, under-sink systems and off-grid applications.

How Long Does the LED-4R Last?

The UV Guard LED-4R has a rated operating life of up to approximately 5,000 hours.

Depending on the amount of water being treated and how frequently the system operates, this can represent more than 1 million litres of treated water.

The system incorporates an LED operating-life timer to help monitor the service life of the UV LED system.

Actual operating life will depend on water usage, flow rate and operating conditions.

Installation & Connections

The LED-4R uses ¼” push-fit water connections and is supplied with a mounting bracket for installation.

The unit should be installed after the required pre-filtration stages so that water entering the UV chamber meets the recommended water-quality requirements.

The system is designed for low-flow drinking water applications with a maximum flow rate of 4 LPM.

For electrical installations, ensure the power supply and installation comply with applicable Australian requirements.

If you are unsure whether the LED-4R is suitable for your water supply, flow rate or installation, contact Water Filtration Solutions before purchasing.

What the LED-4R Does – and Doesn’t Do

It is important to understand the role of UV treatment when designing a drinking water filtration system.

The LED-4R Provides:

• UV disinfection of suitable water
• Chemical-free UV treatment
• Treatment of microorganisms as water passes through the chamber
• Compact drinking water UV treatment
• Automatic operation through the flow switch

The LED-4R Does Not Remove:

• Sediment
• Dirt
• Sand
• Dissolved minerals
• Hardness
• Salts
• Most dissolved chemicals
• Unpleasant tastes or odours by itself

For this reason, UV is normally installed after appropriate filtration.

Frequently Asked Questions

What is a 12V UV water steriliser?

A 12V UV water steriliser uses ultraviolet light to disinfect water and can operate from a 12V DC electrical supply.

The UV Guard LED-4R accepts 12–24V DC and is designed for drinking water applications up to 4 LPM.

Is the LED-4R suitable for caravans and RVs?

Yes. The LED-4R is particularly suited to caravans and RVs because it can operate from a suitable 12–24V DC supply and can also be operated from 240V AC using the supplied adaptor.

Can the LED-4R run from 240V?

Yes. The LED-4R can operate from 240V AC using the supplied power adaptor.

What is the maximum flow rate?

The maximum recommended flow rate of the LED-4R is 4 litres per minute (4 LPM).

Does the water need to be filtered before UV treatment?

Yes. Water entering the LED-4R should be pre-filtered to 5 microns or better.

Appropriate water quality is essential because turbidity, suspended particles and other contaminants can interfere with UV transmission.

Does the LED-4R use a UV lamp?

No. The LED-4R uses UV LED technology rather than a traditional mercury UV lamp.

How long does the LED-4R last?

The LED-4R has a rated operating life of up to approximately 5,000 hours, depending on operating conditions.

Can the LED-4R be installed under a kitchen sink?

Yes. Its compact design makes it suitable for under-sink drinking water applications where the required water flow is no more than 4 LPM.

Can I use the LED-4R for rainwater?

Yes, provided the rainwater is appropriately treated and meets the required water-quality conditions for UV treatment.

Suitable pre-filtration should be installed before the UV system.

Can I use the LED-4R for bore water?

Potentially. Bore water should be tested to determine its quality and whether additional filtration or treatment is required before UV disinfection.

Does UV remove chemicals from water?

No. UV is primarily a disinfection process and does not remove dissolved chemicals, minerals, hardness or sediment.

Additional filtration or treatment may be required depending on the water source and water-quality requirements.

Is the LED-4R suitable for whole-house UV treatment?

No. The LED-4R is designed for low-flow drinking water applications up to 4 LPM.

For whole-house applications, a higher-flow UV water sterilisation system should be selected based on the required household flow rate.

What size water connection does the LED-4R use?

The LED-4R uses ¼” push-fit connections.

Choose the Right UV Water Steriliser

The UV Guard LED-4R is an excellent choice when you need compact UV disinfection for a dedicated drinking water application.

With 4 LPM flow, 12–24V DC operation, 240V AC compatibility, automatic flow activation and UV LED technology, it is particularly suited to:

• Drinking water systems
• Under-sink installations
• Caravans
• RVs
• Boats
• Tiny homes
• Off-grid properties
• Rainwater drinking water systems

For whole-house applications or higher flow rates, a larger UV water steriliser should be selected.

Need Help Selecting a UV Water System?

Choosing the correct UV system depends on factors including:

• Required flow rate
• Water source
• Water quality
• Turbidity
• UV transmittance
• Existing filtration
• Available power supply
• Installation requirements

If you are unsure whether the UV Guard LED-4R is suitable for your application, contact the Water Filtration Solutions team before purchasing.

Order the UV Guard LED-4R

The UV Guard LED-4R LED UV Water Steriliser provides compact, chemical-free UV disinfection for drinking water applications up to 4 LPM.

With flexible 12–24V DC and 240V AC operation, automatic flow activation and a compact design, it is an ideal solution for homes, under-sink drinking water systems, caravans, RVs, boats and off-grid applications.

Order your LED-4R UV Water Steriliser from Water Filtration Solutions today.