The Complete Process – Clean, Purify, and Restore Your Water
At Pure Water Systems NZ, our PureClean Water Tank Restoration Process goes beyond basic tank cleaning.
We don’t just remove sludge — we restore your water to full health, combining deep cleaning, sanitisation, and aeration for safe, great-tasting water that stays cleaner for longer.
Our 4-Stage PureClean Process
Sediment & Sludge Removal
Remove the Hidden Contaminants – Protect Your Water and Health
Over time, every water tank collects a layer of sediment, sludge, and organic debris at the bottom, even if the water above looks clean. This build-up can contain bacteria, mould, rust, and other contaminants that affect taste, odour, and water safety.
At Pure Water Systems NZ, we use our PWS PureClean Sediment Removal Process to safely extract sludge and restore your water tank’s health AND without needing to drain the tank completely.
- Prevents bacterial growth and harmful microorganisms.
- Improves water taste, clarity, and odour.
- Extends the life of your water tank and pumps.
- Reduces filter blockages and maintenance costs.
- Protects your family’s and livestock’s health.
The remaining water is filtered to remove suspended solids, restoring clarity and improving taste. This prevents you from needing expensive refill water and minimises waste.
Water Sanitisation (Pure Water Sanitiser)
Our trained technicians apply to eliminate harmful microorganisms, neutralise odours, and restore your water’s freshness — without using chlorine or harsh chemicals.
Why Pure Water Sanitiser Makes the Difference
- Removes bad tastes and odours.
- Kills bacteria, viruses, algae, and microorganisms.
- Chlorine-free, environmentally safe formula.
- Purifies your entire system — tank, pipework, and taps.
- Removes biofilm without toxic by-products.
- Odourless, tasteless, and pH neutral.
- Safe for septic and wastewater systems.
- Fast acting with long-lasting protection.
Healthier Water for Your Family
TBC™ is approved under the New Zealand Drinking Water Guidelines and recognised by the National Health & Medical Research Council for use in potable water. It’s eco-friendly, cost-effective, and completely safe to drink once diluted.
During treatment, the active ingredient — hydrogen peroxide stabilised with silver — breaks down into harmless water (H₂O) and oxygen (O₂). The silver ions remain in trace amounts, providing a residual protective effect that prevents recontamination for weeks or even months.
Water Aeration (PureAir System)
Bring Your Tank Water Back to Life
Over time, water stored in your tank loses oxygen, becomes stagnant, and can start to smell or taste unpleasant. This is caused by a lack of movement and the build-up of sediment at the bottom of the tank — creating anaerobic conditions where bacteria thrive.
Our PureAir Water Aeration System restores life to your stored water by circulating and oxygenating it at a sub-surface level. This simple but powerful process helps improve taste, clarity, and overall water quality — keeping your supply clean, fresh, and safe.
Why Water Aeration Matters
- Prevents bacteria and algae growth.
- Reduces odours and bad-tasting water.
- Keeps stored water oxygenated and healthy.
- Reduces stagnation and sediment build-up.
- Extends the life of your water tank and filtration system.
Why Choose PureClean Over Traditional Cleaning
No wasted water
90% of your existing water is filtered, purified, and retained
No tank damage
We never water-blast interiors, eliminating abrasion risk.
No entry required
Safer for our team and your water system
Scientifically proven
Our sanitisation process is approved under NZ Drinking Water Guidelines.
Environmentally responsible
Minimal waste, no chlorine, no pollutants.
How It Works
When water is first collected through rainfall, water delivery, or pumping, it’s naturally oxygenated. But as it sits idle in your tank, that oxygen dissipates. Our PureAir System continuously circulates and aerates the water at a sub-surface level, adding oxygen throughout the tank to prevent the formation of anaerobic (oxygen-deprived) zones where bacteria and organic matter thrive.
- Restores dissolved oxygen (DO) levels to maintain water freshness.
- Keeps the water moving and balanced, reducing stagnation.
- Promotes clearer, better-tasting water that’s healthier for you, your family, and your property.
The Result
Crystal-clear, oxygenated, and sanitised water completely free from sediment, odour, and harmful microorganisms.
Cleaner water. Safer water. Pure Water.
Are You Ready to Embrace a Higher Disinfection Standard?
FAQs
Got Questions?
We get it! Looking after your water tank isn’t something most people think about until there’s a problem.
Here’s a quick rundown of the most common questions we’re asked about cleaning, testing, and maintenance.
If you can’t find what you’re after, just give us a call on 0800 79 74 76 or send a message using our contact form, we’re happy to help.
What size tanks do you usually clean?
I think my tank is leaking, can it be repaired?
Should I clean my water tank even if my water appears to be of a high quality?
How do you know you are removing all of the sediment from my tank?
Most of the time I can see the bottom of the tank, I attach an underwater camera to the vacuum head which I monitor to ensure the whole tank is cleaned and to meet our quality standards.
Is the equipment you use hygienic?
Does my tank need to be empty for you to clean it?
How much water will I lose?
Do you take the wastewater away?
How long do I have to wait after you clean my tank before I can use my water?
You can use your water straight away, if you can’t that means we have not done my job properly.