Free Water Test · Stoke, Nelson & RichmondFree Water Test · Nelson

See what's in your tap water. Then decide.

Bring a sample of your tap water to Stoke. I'll test it in front of you, run it next to filtered water, and let you taste the difference. Free, no pressure, and you leave knowing exactly what you're drinking.

Book a Free Test Text Mark — 020 433 9855
5.0 on Google · Nelson customers
  • 20 Years in Water Filtration
  • NSF-Certified RO Membrane
  • 2-Year Warranty
  • 30-Day Money-Back
The Free Test

Two ways to find out what's in your tap water.

Most people pick the first one. You see the actual filter, how big it is, how it works, and you taste the water before you spend a cent.

Most Popular Mark testing a water sample with a TDS meter

Bring a sample to me in Stoke

Fill a clean jar or bottle from your kitchen tap and bring it round. I'll test it while you watch, show you the same test on filtered water, and you can taste both side by side. Takes about 20 minutes.

102 Songer Street, Stoke, Nelson Test days: Thursday after 4pm · Saturday morning Text me first so I know you're coming. If those times don't suit, I can usually squeeze you in another time.
  • See the unit running and how much room it needs under a sink
  • Live TDS and pH readings on your water and on filtered water
  • Open in Google Maps
Text to Book a Time
Home visit Mark checking under a kitchen sink in a Nelson home

Or I come to you

If you'd rather I test at your tap, I do free in-home tests across Nelson, Stoke and Richmond. Same tests, same no-pressure chat, and I can measure up under your sink while I'm there.

  • About 20 minutes at your kitchen bench
  • Quick measure-up if you want a quote for an install
  • No obligation, ever
Request a Home Visit
How It Works

Three steps. No sales pitch.

  1. 1

    Grab a sample

    Run your cold kitchen tap for a few seconds, then fill a clean jar or bottle. About a cupful is plenty. Or book a home visit and skip this bit.

  2. 2

    I test it in front of you

    A TDS meter shows how much is dissolved in your water, a pH meter shows how acidic or alkaline it is, and both get compared to filtered water on the spot. The jars in the photos here went from 75 ppm to 2 ppm. Then you taste them side by side.

  3. 3

    You decide

    I explain what the numbers mean against the NZ Drinking Water Standards and answer your questions. If a filter makes sense for your home, I'll tell you. If it doesn't, I'll tell you that too.

Straight up: Nelson's town water is safe to drink. It meets the standards. What the test shows you is how much is still in it, and whether that's something you want to remove. Plenty of people see the numbers and decide they're fine. That's a good outcome too.
TDS meter reading beside two glasses of water
Live TDS reading
Meter in a jar labelled Tap
Tap water · 75 ppm
Meter in a jar labelled Filtered
After the filter · 2 ppm
Have a Look First

See the test and a real install before you get in touch.

Two short clips, filmed in Nelson kitchens. One on what's actually in tap water, one showing exactly what goes under the sink. No stock footage, just me.

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The Systems

Two systems. Both installed under your sink, both backed for two years.

Compact tankless reverse osmosis units with a dedicated tap. No bulky storage tank, no countertop box. I fit them myself and I'm ten minutes away when the filters need changing.

Aqua Pure 5-stage reverse osmosis unit, a slim black box that sits under the sink Aqua Pure display showing inlet and outlet TDS readings

Aqua Pure

5-Stage Reverse Osmosis
$1,495Installed · incl. GST

A slim tankless unit about the size of a shoebox on its end. Five stages of filtration finishing with an NSF-certified 0.0001 micron RO membrane, and a display on the front that shows the TDS going in and coming out.

  • 1 · Sediment pre-filter
  • 2 · Carbon block
  • 3 · Fine sediment
  • 4 · RO membrane
  • 5 · Polishing carbon
  • Live inlet and outlet TDS on the unit
  • Stainless tap with its own TDS readout
  • Installed by Mark, under your sink
  • Dedicated tap and full install kit
  • 2-year warranty, parts and labour
  • 30-day money-back guarantee
Ask About the Aqua Pure
Hydrogen + UV Aqua Pure Pro 7-stage unit with its stainless steel tap Aqua Pure Pro seen from above, showing the UV and hydrogen indicators

Aqua Pure Pro

7-Stage RO · Hydrogen · UV
$1,795Installed · incl. GST

The same five RO stages as the Aqua Pure, plus a UV light on the outlet and hydrogen enrichment of the finished water. Same slim tankless footprint. The unit I have in my own kitchen.

  • 1–5 · As Aqua Pure
  • 6 · UV sterilisation
  • 7 · Hydrogen
  • Stainless tap with its own TDS readout
  • Installed by Mark, under your sink
  • Dedicated tap and full install kit
  • 2-year warranty, parts and labour
  • 30-day money-back guarantee
  • UV sterilisation stage
  • Hydrogen-enriched water
Ask About the Aqua Pure Pro

Running cost

A replacement filter set is $230, fitted. Most homes go around 18 months between changes. Heavy use or dirtier water shortens that, light use stretches it. I'll tell you when yours is due.

Change your mind?

Full refund on the system within 30 days if it's not right for you. I come and take it out. The install fee, which is $199 of the price, isn't refunded. Everything else is.

Certified, not just claimed

The RO membrane is certified to NSF/ANSI 58. Read the certificate. I don't make the filter. I've tested a lot of them over 20 years and this is the one I put in my own house.

What reverse osmosis takes out

The membrane has 0.0001 micron pores. Water molecules get through and most other things don't. It also strips the minerals, which is why RO water tastes so clean and why I answer that question honestly in the FAQ below.

  • Chlorine and chloramineThe taste and smell most people notice
  • FluorideWhere it's added to supply
  • Heavy metalsLead, copper, arsenic, mercury
  • Bacteria and parasitesE. coli, Giardia, Cryptosporidium
  • PFAS "forever chemicals"Industrial pollutants that don't break down
  • Herbicides and pesticidesGlyphosate and agricultural run-off
  • Sediment and rustAnything you can see, and plenty you can't
  • Dissolved solidsThe TDS number you'll see drop on the meter
Mark Bannan holding a copy of the NZ Drinking Water Standards
MARK BANNAN — OWNER, TESTER, INSTALLER
About Mark

Twenty years of testing filters so you don't have to.

I've spent close to 20 years working with water filtration systems. I know how they work, where they make sense, and where they don't. That's why I only install one type: NSF-certified reverse osmosis, under the sink, with a proper tap.

I'm not here to push anyone into anything. My job is to test your water, explain the results clearly, and let you decide what makes sense for your home. If you buy a system, I'm the one who installs it, services it, and answers the phone when you have a question.

Local

Based in Stoke. Servicing Nelson, Richmond and everywhere in between.

Honest

If your water's fine, I'll say so. The test is free either way.

One person, start to finish

Test, install, filter changes and warranty. Same phone number for all of it.

What Nelson locals say

Every one of these is a real Google review from a customer I've tested for or installed for.

5.0 STARS ON GOOGLE
"Absolutely stoked with the drinking water filter Mark installed. Total game changer. The water now tastes so clean and fresh, and I've found myself drinking way more of it as a result. Seeing the stark difference between our untreated water and filtered water was eye-opening. Mark's super knowledgeable and professional. If you're in Nelson and care about what you're drinking, do yourself a favour and get in touch."
— Matt Jordan, Google review
"Mark installed a 7 stage hydrogen water filter in my kitchen. I'm so pleased with the results, he also installed the tap. Everything was super easy, I wish I'd done this sooner. He will also test your water as well! Highly recommend, now I can drink water knowing it has no nasties in it!"
— Ally Hastie, Google Local Guide
"I always worried about the tap water and I would drink bottled water instead, thinking it was better even though I was worried about microplastics. When Mark showed me what was in the water I was drinking I was completely shocked. I will never go back to bottled water or tap water. The taste of the filtered water is just so clean and pure, I wish I got one sooner."
— Jennifer, Google review
"I love that this filter leaves the water with no fluoride and no chlorine at all. It just tastes so much fresher now."
— Debbie, Google review
Read All Google Reviews Leave a Review
Reviews open in Google
Questions

The things people ask before they call.

Is there any obligation after the water test?

No. The test is free, and there's no obligation to install anything. The goal is simply to help you understand your water first. Plenty of people look at the numbers and decide they're happy as they are.

What do I bring for the test?

A clean jar or bottle with about a cupful of water from your cold kitchen tap. Run the tap for a few seconds first. That's it. Text me before you come so I know to expect you.

Is the system plumbed in?

Yes. It sits under your kitchen sink, connects to your cold water supply, and feeds its own dedicated tap on the bench. Your existing tap keeps working exactly as it does now. There's no tank and nothing on the countertop except the small tap.

Is installation included in the price?

Yes. The $1,495 and $1,795 prices include the unit, the tap, the install kit and me fitting it. Installation is worth $199 of that. There's nothing extra to pay on the day.

Do the systems come with a warranty?

Yes. Two years, parts and labour, on both systems. If anything goes wrong I come and sort it. And under the Consumer Guarantees Act you've got protection on top of that, as with anything you buy in New Zealand.

What if I decide the system isn't right for my home?

You've got 30 days. If it's not for you, I'll come and remove it and refund the system in full. The only part not refunded is the $199 install fee. No arguments, no forms.

What happens if the system is removed?

I take out the unit and the tap, and cap off the connection to your cold supply so everything's back to how it was. If a new hole was drilled in your bench for the tap, that hole stays, so it's worth deciding on tap placement carefully at install.

Are your filters NSF certified?

Yes. The reverse osmosis membrane is certified to NSF/ANSI 58, which is the standard for RO drinking water systems. You can read the certificate here, and I'm happy to show you the paperwork in person.

Doesn't reverse osmosis strip the minerals too?

Yes, it does. RO takes out most of what's dissolved in the water, and that includes calcium and magnesium along with the stuff you don't want. Most of the minerals your body needs come from food, not water, but it's a fair question and I'd rather you heard it from me. If it matters to you, ask me about it at the test and we'll talk it through.

How often do the filters need changing, and what does it cost?

A full filter set is $230, fitted. Most homes get around 18 months out of a set. Households that put a lot of water through, or have dirtier supply, will be sooner. I keep track and let you know when yours is due.

Do you sell the units without installation, or ship them outside Nelson?

Not at the moment. Every system I sell, I install and back myself. That's the whole point. If that changes I'll put it on this page.

Get In Touch

Book a free test, or just ask a question.

Text is quickest. Otherwise fill in the form and I'll get back to you, usually the same day.

Talk to Mark directly

No call centre, no sales team. You'll hear back from the person who does the testing and the installs.

020 433 9855Call or text nelsoncleanwaterfilters@gmail.com 102 Songer Street, StokeTest days: Thu after 4pm · Sat morning · text first

Home visits across

  • Stoke
  • Nelson City
  • Richmond
  • Surrounding areas

Prefer to talk? Call or text 020 433 9855 any time.

Text Mark Book a Test