Gravity Filter vs Water Filter Jug (Brita): Is It Worth the Upgrade?
If you've been filtering your drinking water with a Brita jug, you're already ahead of most households. You're thinking about what's in your water. You're not happy paying $3 a litre for plastic bottles. That instinct is right.
But a filter jug and a gravity purifier are not doing the same job. Understanding the difference — what a Brita actually removes, what it doesn't, and what you get with a multi-stage gravity system — makes the upgrade decision straightforward.
What a Brita Jug Actually Does
Brita's MAXTRA PRO cartridge is a single-stage filter using a blend of granular activated carbon and ion exchange resin. Pour water in the top, it drips through the cartridge over a few minutes, and filtered water collects below. Simple, convenient, affordable to start.
A Brita jug does a reasonable job of:
- Reducing free chlorine (taste and odour)
- Reducing limescale (calcium carbonate — relevant in hard-water areas)
- Reducing some heavy metals via ion exchange
- Reducing some pesticides and industrial chemicals
Brita's newer MAXTRA PRO cartridge now claims greater than 99% PFAS reduction, which is a meaningful improvement on older versions.
What a Brita jug doesn't do is just as important as what it does.
What a Brita Jug Doesn't Do
It doesn't handle chloramine. Sydney Water uses chloramine as the primary disinfectant in most zones — not free chlorine. Granular activated carbon, which is the core of every Brita MAXTRA cartridge, is designed and optimised for free chlorine. It removes chloramine slowly and incompletely at jug flow rates. If your tap water still tastes or smells chemical after running it through a Brita, this is likely why. Chloramine requires catalytic carbon — a different medium entirely.
It doesn't add minerals back. Brita's filtration removes some of the calcium from hard water. For Australians on Sydney's already-soft water supply (48–80 mg/L), this means your filtered water has even fewer dissolved minerals than the tap. Water is not just H₂O — the calcium, magnesium, and potassium naturally present in good water matter. A Brita jug doesn't restore them.
It doesn't protect against bacteria. The MAXTRA cartridge has no antimicrobial stage. Water stored in the lower chamber of a Brita jug can develop bacterial growth over time, particularly if the jug isn't refrigerated or the cartridge isn't replaced on schedule. Brita itself recommends replacing cartridges every four weeks and keeping the jug refrigerated — guidance many households don't follow closely.
It has no colloidal silver protection. Colloidal silver within the filter media and in the lower chamber actively inhibits microbial growth. This is a standard feature of quality multi-stage gravity systems and completely absent from Brita's design.
It doesn't raise pH. Brita-filtered water typically has a neutral to slightly lower pH than the tap water going in — meaning it won't give you the naturally alkaline water that comes from mineral-stage filtration.
It has a small capacity. A Brita Marella holds 2.4 litres total, with roughly 1.4 litres of filtered water at a time. For a family, you're constantly refilling and waiting for the jug to drip through. A 12-litre gravity purifier gives you a full day's drinking water ready to go.
Side-by-Side Comparison
| Feature | Brita Jug (MAXTRA PRO) | Genzon 12L Gravity Purifier |
|---|---|---|
| Filtration stages | 1 stage | 5 stages |
| Free chlorine removal | ✓ Good | ✓ Excellent |
| Chloramine removal | ✗ Underperforms | ✓ Catalytic carbon |
| Heavy metals | ✓ Partial (ion exchange) | ✓ Full ion exchange resin |
| PFAS reduction | ✓ Claimed >99% (MAXTRA PRO) | ✓ Activated carbon + ion exchange |
| Bacteria protection | ✗ None | ✓ 0.2-micron ceramic + colloidal silver |
| Mineral restoration | ✗ None | ✓ Deep-sea mineral stones |
| Natural alkalinity | ✗ Neutral to slightly acidic | ✓ pH 7.5–9.0 |
| Antimicrobial stored water | ✗ None | ✓ Colloidal silver stage |
| Ionisation | ✗ None | ✓ 1,200-gauss magnetic tap |
| Capacity | ~1.4L filtered at a time | 12L ready to drink |
| Cartridge replacement | Every 4 weeks (~150L) | 12–18 months |
| Upfront cost | ~$40–$50 (jug) | $346.50 (on sale from $495) |
| Running cost per litre | ~$0.07–$0.10/L (cartridges) | Under $0.10/L |
| Warranty | Manufacturer warranty (varies) | 5-year parts warranty |
| Electricity required | None | None |
The Cost Calculation Most People Get Wrong
At first glance, a $40 Brita jug looks like the obvious budget choice compared to a $346.50 gravity purifier. But look at the ongoing cost.
A Brita MAXTRA PRO cartridge filters approximately 150 litres before needing replacement — roughly once a month for an average household. Cartridges cost around $10–$12 each, putting your running cost at approximately $0.07–$0.10 per litre. Over two years of use, you'll spend $240–$290 on cartridges alone — on top of the upfront jug cost.
Genzon's replacement cartridge for the multi-media stage lasts 12–18 months. The ceramic pre-filter and mineral stones last considerably longer. Running cost: under $0.10 per litre.
So on a per-litre basis over two years, the running costs are genuinely comparable. The difference is what you're getting for that cost — a single-stage carbon filter, or a 5-stage system that purifies, mineralises, and ionises your water.
And that's before you factor in the convenience of 12 litres ready to go versus constantly refilling a 1.4-litre jug.
The Chloramine Problem: Why Many Brita Users Are Still Disappointed
This is worth its own section because it explains a very common experience: you buy a Brita jug, expecting great-tasting water, and it's... fine. Maybe slightly better. But there's still a faint chemical smell. Still not what you'd call clean-tasting.
In most of Sydney and many other Australian cities, the tap water is disinfected with chloramine, not free chlorine. Chloramine is a more stable compound that travels further through the pipe network before breaking down — which makes it better for public health, but harder to filter out.
Granular activated carbon — the core of Brita's MAXTRA technology — is designed and optimised for free chlorine. It reacts with chlorine quickly and removes it effectively. But monochloramine (the form used by Sydney Water) reacts with standard carbon much more slowly. At the short contact time you get when water drips through a Brita jug, a significant portion of the chloramine passes straight through.
The media that removes chloramine is catalytic carbon — a modified form of activated carbon with a different surface structure. Genzon's Stage 2 multi-media cartridge includes both standard activated carbon and catalytic carbon, meaning it handles both disinfectant types regardless of your supply zone.
What You're Really Choosing Between
A Brita jug is a convenience product. It makes your tap water taste a bit better, reduces some chlorine, and takes up a shelf in your fridge. For someone who wants an incremental improvement over straight tap water at minimal upfront cost, it does what it promises.
A gravity purifier like Genzon is a different category of product entirely. It's not just filtering your water — it's transforming it. Five stages of treatment remove contaminants a Brita jug can't touch, restore the minerals that treatment strips out, protect stored water with colloidal silver, and deliver naturally alkaline, ionised water at the point of dispense.
If you've been using a Brita jug and you're reading this, chances are something has been nagging at you. Maybe the taste still isn't quite right. Maybe you're sick of replacing cartridges every month. Maybe you've been reading about PFAS or chloramine and wondering whether your filter is actually handling them. Those instincts are sound — and the answer to all of them is the same upgrade.
Who Should Stick with a Brita Jug?
Honestly? If you're in a temporary living situation, travelling, or genuinely can't stretch the upfront cost right now, a Brita jug is better than nothing. It removes free chlorine, reduces limescale, and the newer MAXTRA PRO performs better than older cartridges on PFAS.
But if you're settled in your home, drinking filtered water every day, and want the best result for your family long-term — the upgrade is worth it. The cost per litre is comparable. The quality of water is not.
Shop the Genzon 12L Purifier — currently $346.50 (was $495) →