Greenway GAUV-15S UV Water Disinfection System

Greenway GAUV-15S — UV Water Disinfection System

The Greenway GAUV-15S is a high-capacity UV water disinfection system built for residential and light commercial applications requiring higher flow rates. Housed in a compact 304 stainless steel chamber with a hard glass, long-life UV lamp, the GAUV-15S delivers 99.99% destruction of bacteria, viruses, and protozoan cysts — with no chemicals, no water chemistry changes, and no impact on taste or odour.

The separate electronic ballast provides constant lamp current, universal AC input, and a 7-segment LED countdown display for lamp failure alerts and annual replacement reminders. The single-ended lamp design makes servicing simple, and the unique Greenway VuCap gives instant visual confirmation that the UV lamp is running.

Key Features

• 99.99% pathogen destruction — eliminates bacteria (including E. coli), viruses, and protozoan cysts (Cryptosporidium and Giardia lamblia).
• Chemical-free treatment — no additives, no water chemistry changes, no taste or odour impact.
• Greenway VuCap — unique visual indicator confirms the UV lamp is on and operating.
• 7-segment LED countdown display — lamp failure alarm and annual replacement reminder built in.
• Hard glass, long-life UV lamp — consistent maximum UV output maintained over the full lamp life.
• Single-ended lamp design — user-friendly lamp changes and easy quartz sleeve cleaning.
• Electronic ballast controller — universal 100–240V AC input, constant lamp current, low power consumption (46W total).
• Compact stainless steel chamber — reduced footprint with improved disinfection efficiency.
• Flexible inlet/outlet — combination ¾" FNPT – 1.0" MNPT ports for easy installation.
• NSF/ANSI 55 certified — third-party bioassay tested and certified by NSF International (Class B), CSA B483.1, and NSF 372 (low lead content).

Technical Specifications

Brand	Greenway Water Technologies
Model	GAUV-15S
Chamber Material	304 Stainless Steel
Flow Rate @ 16 mJ/cm²	46 GPM (174 LPM)
Flow Rate @ 30 mJ/cm²	24.5 GPM (92 LPM)
Flow Rate @ 40 mJ/cm²	18 GPM (68 LPM)
Chamber Diameter	3.5" (88.9 mm)
Chamber Length	39.5" (1003 mm)
Ballast Dimensions	8" x 3" x 2"
Inlet / Outlet	¾" FNPT – 1.0" MNPT (combination ports)
Max Operating Pressure	125 psi (862 kPa)
Pressure Drop @ 30 mJ/cm² rated flow	0.8 psi
Supply Voltage	100–240V AC, 50/60 Hz
Total Power Consumption	46W
Lamp Wattage	40W
Certifications	NSF/ANSI 55 Class B, CSA B483.1, NSF 372

* Flow rates based on third-party bioassay test results at 97% UVT, adjusted for expected UV dose at end of 1 year continuous operation (EOLL). 1 mJ/cm² = 1 mW·sec/cm² = 1000 μW·sec/cm².

Warranty (New Zealand)

• Ballast: 1 year (Pro Rata)
• UV Lamp: 1 year (Pro Rata)
• Chamber: 7 years

Ideal For

• Residential tank water and bore water treatment at higher flow rates
• Rural properties with multiple bathrooms or high water demand
• Point-of-entry whole-house disinfection for larger homes
• Light commercial and irrigation water treatment
• Applications where chemical-free treatment is required

PLEASE NOTE: This is the UV System ONLY, it is recommended to be used in conjunction with additional mechanical filtration. Please read more on filtration stages HERE

 

Understanding UV System Flow Rates

UV systems are rated according to the flow rate of water they can treat while delivering a specified UV dose. The higher the UV dose, the greater the level of UV treatment provided.

You may see three different flow rates listed for a UV system:

Drinking Water Standard Flow – 40 mJ/cm²
This is the flow rate at which the UV system provides a UV dose of 40 mJ/cm². This is the flow rate we recommend when the system is being used to treat drinking water, providing a higher level of UV treatment.

Nominal Flow – 30 mJ/cm²
This is the manufacturer's nominal rated flow at a UV dose of 30 mJ/cm². It provides a useful reference point when comparing UV system capacities.

Maximum Flow – 16 mJ/cm²
This is the maximum flow rate the UV system can process, but at this higher flow the UV dose is reduced to 16 mJ/cm². This should not be considered the appropriate flow rate for drinking-water applications, and is best for applications such as algae reduction, and clarification.

Which flow rate should I use?

For drinking water applications, we recommend sizing the UV system using the 40 mJ/cm² flow rate, NOT the maximum flow figure.

When choosing a UV system, it's important to consider the maximum flow your property could require at one time, not simply the average daily water use. A system that is too small may not provide the required UV dose when several taps or appliances are operating simultaneously.

If you're unsure which UV system is right for your property, contact WTS and we can help you select a system based on your expected flow rate and application.