Auckland based · New Zealand travel by arrangement
15 years. More than 1,800 installations. Straight answers about your water.
The Filter Guy is David Jenner. I have spent 15 years installing, servicing and troubleshooting water-treatment systems in homes, retail premises, commercial operations, hospitals and other high-purity environments.
The real history
Practical experience built one installation at a time.
Across more than 1,800 installations, I have worked with everything from a single under-bench drinking-water filter to reverse-osmosis, deionisation, ultraviolet, ultrafiltration and softening systems. That experience comes from doing the work: assessing the water, choosing equipment, installing it, commissioning it, servicing it and sorting out systems that are not performing properly.
HOSPITAL & HIGH-PURITY EXPERIENCE
Water quality where the detail matters
My history includes water-treatment work in hospital and other high-purity settings, including applications where microbiological performance and endotoxin risk formed part of the water-quality requirement. In this work, correct treatment stages, sanitisation, monitoring and maintenance cannot be treated casually.
RESIDENTIAL & RETAIL INSTALLATIONS
More than a product in a box
I have installed and serviced systems in homes, apartments, shops, retail premises and small businesses. Work ranges from under-sink filters and direct-flow RO to whole-house filtration, UV disinfection, water softening and equipment replacement.
COMMERCIAL & MEMBRANE SYSTEMS
Larger jobs need a proper system
Commercial, industrial, laboratory and high-purity projects are considered around the actual water analysis, flow, storage, treatment target and operating requirements—not around a generic package or sales script.
What I work with
Water treatment across domestic and industrial systems
David Jenner was trained and certified by Anthony Preston Limited (APL) at Advanced level for domestic and industrial water-treatment systems.
- Under-bench and whole-house filtration
- Reverse osmosis and deionisation
- Greenway ultraviolet systems
- Ultrafiltration and microbial barriers
- Ion-exchange softening
- Filter, membrane and cartridge selection
- Commissioning, servicing and fault-finding
Three ways to get the right result
Advice, products or an engineered project.
You do not need to guess which business or piece of equipment comes first. Start with the water problem and the result you need.
THE FILTER GUY
Assessment, installation and service
Auckland is the normal area for site work. Suitable jobs elsewhere in New Zealand can be discussed and travelled to by arrangement.
WHOLESALE FILTERS
Buy filters, parts and Greenway UV equipment
For do-it-yourself purchases, replacement filters, membranes, UV lamps, quartz sleeves and Greenway UV systems, use Wholesale Filters. If you are unsure what fits, ask before ordering.
MEMBRANE SOLUTIONS NZ
Commercial and engineered treatment
For larger commercial, membrane, laboratory and high-purity projects, Membrane Solutions NZ is the specialist route for system design, equipment and commissioning.
Based in Auckland. Available to travel for the right job.
Auckland is the normal service area for site visits, installation and servicing. For suitable investigations, installations and commercial projects elsewhere in New Zealand, travel can be arranged when the timing and scope make sense.
Tell me about the water—not the product you think you need.
Send the location, water source, problem, required result and any photos or test results. I will tell you whether it is a Filter Guy service job, a Wholesale Filters product enquiry or a Membrane Solutions project.