The Filter Guy

Engineered ultra-pure water for New Zealand industry & research

Multi-stage RO, EDI, deionisation and validated ultra-pure water plants for
laboratories, research facilities, food and beverage producers, dairy,
horticulture and pharmaceutical operations.

Industrial water treatment, engineered for NZ conditions

Industrial water filtration in New Zealand is a specialist discipline. The contaminant load varies enormously between Auckland’s chlorinated mains, Canterbury’s mineral-heavy aquifer water, the Waikato’s bore networks and the West Coast’s organic-rich surface water — and the consequences of getting it wrong are measured in product recalls, compliance failures and seven-figure equipment replacements. We design industrial systems from first principles: full inlet water analysis, demand profiling, contaminant mapping, multi-stage selection (RO, EDI, ion exchange, ultrafiltration, nanofiltration, UV, ozone), and complete plant integration with PLC monitoring, conductivity logging and remote alarms. Our flagship
industrial reference is the Plant & Food Research installation — dual MO1000 RO units with Watts One™ DI resin cartridges feeding gravity tanks for a 7-storey research facility, delivering laboratory-grade water below 5 µS/cm and reducing service costs by 70%.

Reverse osmosis & EDI for ultra-pure water

Most industrial ultra-pure water plants we deliver are built around a primary RO stage paired with electrodeionisation (EDI) or mixed-bed polishing. RO removes 95–99% of dissolved solids; EDI then continuously polishes that permeate to Type II or Type I lab water purity (typically <1 µS/cm and <50 ppb TOC) without the chemical regeneration headache of traditional ion-exchange resin. Our partner brand Membrane Solutions NZ supplies the spiral-wound RO membranes, hollow-fibre UF modules and nanofiltration elements at the heart of these plants. That vertical integration means faster lead times, locally held spares and direct technical access to the engineers who specified the membranes — a real advantage when something needs troubleshooting quickly.

Food, beverage, dairy & horticulture

New Zealand’s food, beverage, dairy and horticulture sectors all depend on consistent, contaminant-free process water. We design systems for ingredient water, CIP (clean-in-place) rinse water, bottle-rinse water, brewery liquor and irrigation water for hydroponic and greenhouse operations. Spectra Guard scale-control dosing — used at our Plant & Food install — eliminates the need for traditional softeners on many sites, reducing sodium discharge and ongoing salt costs. We work alongside facility engineers, food-safety auditors and consulting hydrologists to ensure every system is fully validated, fully documented and ready for FSSC 22000, BRCGS, MPI and council audits.

Pharmaceutical, medical & laboratory grade water

For pharma, hospital and university lab clients we deliver Type I, II and III water as defined by ISO 3696 and the equivalent USP/EP pharmacopoeia standards. Plants are supplied with full IQ/OQ/PQ validation packs, sanitisable PVDF or 316L stainless ring mains, hot-water sanitisation cycles and continuous online conductivity and TOC monitoring.

Industrial sectors we serve

Frequently Asked Questions

Yes, we supply full validation documentation for pharmaceutical, medical, and laboratory systems. This can include installation qualification (IQ), operational qualification (OQ), performance qualification (PQ), and water quality reports, ensuring compliance with relevant standards and audit requirements.

Absolutely. We can upgrade or retrofit existing systems to improve performance, efficiency, and compliance. This may include adding pre-treatment, upgrading membranes, improving flow capacity, or integrating monitoring systems—all without the need for a complete system replacement.

We provide nationwide servicing across New Zealand, including scheduled maintenance, emergency support, and remote monitoring for critical systems. Our team coordinates planned service intervals, parts replacement, and rapid response to minimise downtime, with priority support available for essential operations.

Other services you might need

Residential Water Filtration

Whole-home and under-sink RO systems for safer drinking water.

Commercial Water Filtration

Cafés, restaurants, offices & hospitality water solutions.

Filter Replacements & Servicing

Genuine cartridges, RO membranes and scheduled servicing.

Wholesale & Trade Supply

Trade pricing for plumbers, resellers and wholesalers salers

Or call us directly on 0800 159858 — we serve the entire North Island and Christchurch.

Get a free water filtration assessment today

Talk to a Kiwi water specialist. We’ll recommend the right system for your home, business or facility — backed by 20+ years of experience.