You've heard that gravity filters produce cleaner, healthier water. But what's actually happening inside that chamber while you wait? Understanding the process makes you a smarter buyer — and gives you confidence that every glass you drink has been through something genuinely impressive.
Here's exactly how gravity-fed water filtration works, step by step, and why Genzon's 5-stage system takes it further than most.
The Basic Principle: Gravity Does the Work
A gravity water filter is elegantly simple in concept. Water is poured into an upper chamber and pulled downward — by gravity alone, with no electricity, no pumps, no pressure — through a series of filter media. By the time it reaches the lower chamber, it's been stripped of contaminants, re-mineralised, and (in Genzon's case) ionised.
That's the beauty of gravity filtration: it's slow enough to do a thorough job. Where pressurised systems push water through quickly, gravity filters allow maximum contact time with each filter stage — and contact time is what makes filtration effective.
Genzon's 5-Stage Filtration Process
Not all gravity filters are created equal. Many use a single-stage ceramic or carbon filter and call it done. Genzon's system runs your water through five distinct stages, each targeting different contaminants and performing a specific function.
Stage 1 — Ceramic Pre-Filter (0.2 Microns)
The first line of defence is a ceramic shell with pores as fine as 0.2 microns. To put that in perspective, a human hair is roughly 70 microns wide. At 0.2 microns, this stage physically blocks bacteria, cysts, sediment, rust, and other particulate matter from passing through at all.
Ceramic filtration has been used for centuries — it's one of the most proven and reliable methods of water purification available. Genzon's ceramic pre-filter can be cleaned and reused, extending its lifespan and making it environmentally sound.
Stage 2 — Multi-Media Cartridge
Water then passes through a multi-media cartridge — the workhorse of the system. This stage contains a blend of:
- Activated carbon — adsorbs chlorine, chloramines, pesticides, herbicides, pharmaceuticals, and volatile organic compounds (VOCs). Also improves taste and eliminates odour.
- Catalytic carbon — a more advanced form of activated carbon that specifically targets chloramines, which standard carbon struggles to remove.
- Silver/copper zeolite — inhibits bacterial growth within the filter itself, keeping the media clean between uses.
- Ion exchange resin — removes heavy metals including lead, mercury, and cadmium by swapping harmful ions for harmless ones.
- Coral and silica — natural minerals that contribute to pH balancing and trace mineral content.
- Tourmaline — a natural mineral that emits far-infrared energy, said to support water structuring and vitality.
This stage is where the heavy chemical and heavy metal removal happens. The slow gravity flow gives each of these media ample contact time to do their work thoroughly.
Stage 3 — Deep-Sea Mineral Stones
Most filters stop at removal. Genzon goes further by adding back what your water should naturally contain.
Stage 3 passes water through mineral stones sourced from depths of 300–600 metres below the ocean surface. At these depths, minerals have been concentrated and compressed over millennia. As water flows through, it picks up calcium, magnesium, and potassium — the same minerals found in premium spring water — along with trace elements your body relies on.
The result is water that doesn't just taste clean — it tastes alive. Naturally alkaline, with a pH typically between 7.5 and 9.0.
Stage 4 — Colloidal Silver Stones
Colloidal silver has long been recognised for its antimicrobial properties. This stage provides a final antibacterial polish, ensuring any residual microbial activity is neutralised before water reaches your tap. It also acts as a preservative within the lower chamber, keeping stored water fresh for longer.
Stage 5 — Magnetic Tap (1,200 Gauss)
The final stage is unique to Genzon. As water exits through the magnetic tap — fitted with a 1,200-gauss magnet — it undergoes ionisation. This process is thought to restructure water molecules into smaller clusters, which may be more readily absorbed at a cellular level.
Whether or not you're drawn to the science of ionised water, the magnetic tap serves a practical purpose too: it provides one last antimicrobial barrier at the point of dispense.
Why Gravity Filtration Beats Tap — and Bottled
Australian tap water is generally safe, but "safe" and "optimal" aren't the same thing. Municipal water is treated with chlorine and chloramines, which are effective disinfectants but known to affect taste, and which react with organic matter to form disinfection by-products. Depending on your area, tap water can also carry trace heavy metals from ageing pipes, agricultural runoff, and — increasingly — PFAS (per- and polyfluoroalkyl substances, or "forever chemicals").
Bottled water solves none of these problems at source. You're paying upwards of $3.00 per litre for water that may simply be filtered tap water, packaged in single-use plastic that leaches microplastics into the product over time.
A Genzon gravity filter costs under $0.10 per litre to run — and it actively removes chlorine, heavy metals, bacteria, cysts, and reduces PFAS, while adding back beneficial minerals. That's not a trade-off. That's a straightforward upgrade.
Who Is Gravity Filtration Best For?
Gravity filters are ideal for households that:
- Want clean, mineralised drinking water without ongoing plastic waste
- Prefer a no-electricity solution (perfect for off-grid, rural, or emergency preparedness)
- Have concerns about the water quality in their area — particularly PFAS or heavy metals
- Are comparing filtered water to expensive bottled water and doing the long-term maths
They're also well-suited to renters and apartments: no installation, no plumber, no modification to your property. Place it on your bench, fill the top, and start drinking better water today.
Maintenance: Simpler Than You'd Think
One of the most common questions about gravity filters is maintenance. The good news: it's minimal.
The ceramic pre-filter can be scrubbed clean with a soft brush under running water every few months — or when you notice flow rate slowing. The multi-media cartridge typically lasts 12–18 months depending on usage and incoming water quality. The mineral stones last several years. Replacement parts are available directly from Genzon, and the whole system is designed to be serviced without tools.
Genzon backs every unit with a 5-year warranty on all parts — a reflection of how well-built the system is.
The Bottom Line
Gravity water filtration is one of the most effective, most affordable, and most sustainable approaches to drinking water available to Australian households today. The physics are proven. The chemistry is sound. And when you add Genzon's 5-stage process — ceramic pre-filtration, multi-media purification, deep-sea mineralisation, colloidal silver treatment, and magnetic ionisation — you end up with water that's genuinely better than what comes out of the tap or out of a bottle.
If you've been on the fence, now you know exactly what you'd be drinking. The rest is straightforward.