Greenway UV_OPT 3XL-Deluxe — Whole-House UV Water Sterilisation System

The Greenway UV_OPT 3XL-Deluxe is a premium whole-house water treatment system combining multi-stage mechanical filtration with certified UV sterilisation. Designed for New Zealand homes on tank, bore, or rainwater supplies, this system delivers safe, chemical-free drinking water at high flow rates suitable for busy households. A step up from the OPT 3-Deluxe with higher filtration surface area, meaning longer intervals between filter changes.

The UV components in this system are tested and certified by NSF International against NSF/ANSI 55 (disinfection performance, Class B), CSA B483.1, and NSF 372 (low lead content).

System Flow Rates

• Drinking Water Standards Flow: 43 LPM @ 40 mJ/cm²
• Nominal Flow: 58 LPM @ 30 mJ/cm²
• Peak Flow: 111 LPM @ 16 mJ/cm²

All options exceed domestic peak flow requirements. Based on average peak domestic flow, allow 15 LPM per shower plus 10 LPM for auxiliary appliances such as dishwasher or washing machine.

System Components

• GW GAUV-10S — Greenway UV sterilisation unit
• 3 x 20BWH — 20" whole-house filter housings
• 1 x 20BPF20 — 20 micron sediment pre-filter
• 1 x 20BRFGAC — Granular activated carbon filter
• 1 x 20BPX01 — Fine sediment post-filter
• Surge Protector — included for UV ballast protection

Key Features

• NSF/ANSI 55 Certified: UV disinfection to Class B performance standard
• Chemical-Free Treatment: No chlorine or additives introduced to your water
• Multi-Stage Filtration: Sediment, carbon, and UV in a single integrated system
• High Flow Capacity: Suitable for large homes and high-demand households
• Low Lead Certified: NSF 372 compliant components
• Surge Protection Included: Safeguards the UV ballast from power fluctuations
• Extended Filter Life: Larger filtration surface area means longer intervals between filter changes vs OPT 3-Deluxe

Ideal For

• Homes on tank water, rainwater, or bore water requiring reliable whole-house disinfection
• Large households with multiple bathrooms and high simultaneous water demand
• Properties requiring sediment and carbon pre-treatment alongside UV sterilisation

PLEASE NOTE: This listing is for the complete UV filter system package. UV sterilisation is most effective when used with adequate pre-filtration — this system includes the recommended filtration stages.

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.

• Drinking Water Standard Flow – 40 mJ/cm²: The flow rate at which the system provides a UV dose of 40 mJ/cm². Recommended for drinking water applications.
• Nominal Flow – 30 mJ/cm²: The manufacturer's nominal rated flow — useful for comparing UV system capacities.
• Maximum Flow – 16 mJ/cm²: The maximum flow rate the system can process, but at a reduced UV dose. Not recommended for drinking water applications.

For drinking water applications, size the UV system using the 40 mJ/cm² flow rate, not the maximum flow figure. Consider the maximum simultaneous flow your property could require, not just average daily use. 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.