A quality home water filter can make everyday drinking water taste better, reduce reliance on bottled water and support a more convenient wellness routine. However, premium systems can cost several hundred or several thousand dollars, so flexible payment plans may make a better water solution easier to fit into your household budget.
As of August 4, 2026, Australian shoppers can find water filters with options such as Afterpay, Zip Pay, Humm, PayPal and longer interest-free plans. The best choice depends on your water concerns, available space, installation preferences and the total cost of ownership.
Quick comparison of popular Australian options
| Water filter | Best for | Installation | Payment options shown by the supplier | Indicative price |
|---|---|---|---|---|
| AlkaWay UltraStream Benchtop | Renters, wellness-focused homes and hydrogen-rich alkaline water | No plumber required | Buy now, pay later instalments available | From $689 |
| AlkaWay UltraStream Undersink | A permanent, tidy kitchen setup | Professional installation recommended | Buy now, pay later instalments available | From $889 |
| AlkaWay UltraStream Twin Undersink | Fridge connections and three-way taps | Under-sink installation | Buy now, pay later instalments available | From $729 |
| Great Water Filters ES2 | Installed alkaline filtration | Professional installation | Four payments or 12-month Zip/Humm plan | $795 installed |
| zazen Water Alkaline Water System | Benchtop filtration without plumbing or electricity | DIY benchtop setup | Four Afterpay payments | $565 |
| AquaMountain UltraStream | Benchtop alkaline and hydrogen filtration | Benchtop setup | Afterpay or Zip Pay | $649 listed |
| My Water Filter systems | Shoppers wanting Afterpay or Zip | Varies by model | Afterpay and Zip | Varies |
1. AlkaWay UltraStream, the strongest all-round option
For households looking beyond basic chlorine and taste reduction, the AlkaWay UltraStream is a standout option. It is designed to produce hydrogen-rich alkaline water while reducing a broad range of common water contaminants.
AlkaWay lists three main UltraStream formats:
- Benchtop: Suitable for renters or households that want a portable system with no plumber required.
- Undersink: Designed for a cleaner countertop and a dedicated filtered-water tap.
- Twin Undersink: Built for added flexibility, including three-way taps and selected fridge connections.
The AlkaWay website currently lists the benchtop model from $689, the undersink model from $889 and the Twin Undersink model from $729, including GST. AlkaWay also promotes buy-now-pay-later instalments, which can help spread the purchase cost instead of requiring the full amount upfront. (alkaway.com.au)
Why choose the UltraStream?
The UltraStream is a strong match for people who want more than a standard jug or carbon filter. AlkaWay states that its layered filtration system reduces substances including fluoride, chlorine, heavy metals, pesticides, pharmaceuticals, microplastics and PFAS. The system also adds alkaline minerals and produces molecular hydrogen-rich water. (alkaway.com.au)
The product has a further advantage for long-term value. The UltraStream manual states that the filter has been laboratory tested to 3,500 litres, with AlkaWay recommending replacement after 12 months or 3,000 litres, whichever comes first, depending on source-water quality. The manual also states that Australian UltraStream products have a three-year warranty. (alkaway.com.au)
Best for: Health-conscious households, fitness enthusiasts, renters and people seeking hydrogen-rich alkaline water without purchasing bottled water.
Explore the AlkaWay UltraStream range
2. Great Water Filters ES2 for an installed alkaline system
The Great Water Filters ES2 is aimed at customers who prefer a professionally installed under-sink system. The supplier currently lists the ES2 at $795 installed, with an option of four payments from approximately $199 or a 12-month interest-free plan from approximately $67 through Zip or Humm. (greatwaterfilters.com.au)
The system uses multiple filtration stages, including sediment filtration, activated carbon, KDF and an alkaline mineral stage. Great Water Filters states that the ES2 is designed to remove impurities and restore minerals such as calcium, magnesium, sodium and potassium. (greatwaterfilters.com.au)
This option may suit customers who want an installed system and ongoing cartridge support. However, the ES2 does not have the same focus on molecular hydrogen as the UltraStream. If hydrogen-rich water is central to your goals, AlkaWay is the more specialised choice.
Best for: Homeowners wanting an installed alkaline filter with longer payment options.
3. zazen Water Alkaline Water System for no-plumbing installation
The zazen Water Alkaline Water System is a gravity-fed benchtop unit that does not require plumbing or electricity. The 8-litre model is listed at $565, with four Afterpay payments of approximately $141.25. (floraandfauna.com.au)
The system includes several filtration and remineralisation components. The supplier states that it is designed to reduce PFAS, chlorine and heavy metals, while adding minerals such as calcium, magnesium and potassium. It has an 8-litre lower tank and a 4-litre upper tank. (floraandfauna.com.au)
This is a practical choice for renters or people who want a simple counter-based system. Its main limitations are the slower gravity-fed filtration process, the amount of bench space required and the need to refill the top tank manually.
Best for: Renters and households wanting a benchtop alkaline system with no installation.
4. AquaMountain for straightforward Afterpay or Zip Pay
AquaMountain lists several alkaline water filters and an AlkaWay UltraStream model with Afterpay and Zip Pay at checkout. Its current product listings include benchtop alkaline filters from approximately $265 and an UltraStream listed at $649. (aquamountain.com.au)
The attraction is convenience. Customers can choose a lower-cost gravity-fed filter or move up to a hydrogen-rich alkaline system while using an instalment provider. AquaMountain also advertises free freight within Australia on the page reviewed. (aquamountain.com.au)
When buying through a reseller, check the warranty terms, after-sales support and replacement-filter availability. Purchasing directly from AlkaWay may be preferable if you want direct access to the brand’s support team, product information and replacement-filter finder.
Best for: Shoppers comparing different alkaline systems through a reseller marketplace.
5. My Water Filter for Afterpay and Zip availability
My Water Filter promotes both Afterpay and Zip as payment methods for eligible water-filter products. Its Afterpay information states that purchases can be divided into four instalments over eight weeks, subject to the provider’s terms and approval. (mywaterfilter.com.au)
The company sells different types of filtration products, so the features and price vary significantly between models. This can be helpful if you want to compare basic drinking-water filtration, under-sink systems and larger household solutions in one catalogue.
However, shoppers should compare the filter media and certified reduction claims rather than choosing only by instalment amount. A low weekly payment does not necessarily mean the system is the best match for your water.
Best for: Customers who want a broad range of filter types and familiar payment providers.
How flexible payment plans work
Payment plans can make a premium filter more manageable, but the repayment structure matters.
Afterpay
Afterpay Pay in 4 generally divides an eligible purchase into four instalments over six to eight weeks and is interest-free when payments are made on time. Afterpay states that late fees may apply when a payment is missed, with fees capped according to its Australian terms. (afterpay.com)
This type of plan may suit a lower-cost benchtop filter or replacement cartridge. It can be less suitable for a large system if the instalments place pressure on your short-term cash flow.
Zip Pay
Zip Pay allows approved customers to choose weekly, fortnightly or monthly repayments. Zip states that purchases are interest-free, but a monthly account fee may apply when the closing balance is not paid in full by the due date. (zip.co)
Zip Pay may offer more flexibility than a four-payment plan, especially for a higher-priced home filtration system. Review the account fee, minimum repayment and total repayment period before accepting the plan.
Longer interest-free plans
Some installed-filter suppliers advertise 12-month interest-free options through providers such as Zip or Humm. These plans can reduce the size of each repayment, but you should confirm whether the offer is genuinely interest-free for the full term and whether fees or conditions apply. Great Water Filters, for example, currently displays a 12-month Zip/Humm option for its ES2 system. (greatwaterfilters.com.au)
What to look for before choosing a home water filter
Match the filter to your water concerns
Different systems address different problems. A basic carbon filter may be suitable for improving taste and reducing chlorine. More advanced systems may be designed to reduce fluoride, PFAS, heavy metals, dissolved solids or other contaminants.
If you use rainwater, tank water or bore water, consider testing the source before buying. The right filtration setup depends on the substances present in your water.
Consider where you live
A benchtop filter is often the simplest option for renters because it usually does not require permanent changes to the kitchen. An undersink system is better for homeowners who want a tidy, dedicated filtered-water tap.
A Twin Undersink system can be useful if you want to connect filtered water to a three-way mixer tap or compatible refrigerator. AlkaWay lists this flexibility as one of the key features of its UltraStream Twin Undersink model. (alkaway.com.au)
Check replacement-filter costs
The initial purchase price is only part of the cost. Compare:
- Replacement-filter price
- Recommended replacement interval
- Delivery costs
- Installation and servicing fees
- Warranty length
- Availability of genuine replacement cartridges
The UltraStream replacement filter is currently listed by AlkaWay at $279, while the UltraStream manual recommends replacement based on time or litres used, depending on source-water conditions. (alkaway.com.au)
Look for practical customer support
A water filter is a long-term household product. Clear installation instructions, replacement reminders, troubleshooting help and responsive customer service can make ownership easier.
AlkaWay provides a support centre, product information, replacement-filter resources and a direct Australian phone number. The company also lists a three-year warranty for UltraStream products. (alkaway.com.au)
Which option is best for you?
- Best overall for hydrogen-rich alkaline water: AlkaWay UltraStream
- Best for renters: AlkaWay UltraStream Benchtop or zazen Water
- Best for an installed alkaline system: Great Water Filters ES2
- Best for flexible payment schedules: A system available through Zip Pay or a 12-month interest-free offer
- Best for long-term product support: Buy directly from the manufacturer or an established Australian specialist. AlkaWay has a 25 year history of support.
- Best for a simple, lower-cost starting point: A benchtop gravity-fed alkaline filter
Final verdict
Flexible payment plans can make a high-quality home water filter more accessible, but the cheapest instalment is not always the best value. Compare the filtration technology, contaminant-reduction claims, filter life, warranty, support and long-term cartridge cost.
For shoppers who want a complete wellness-focused water solution, the AlkaWay UltraStream deserves serious consideration. It offers benchtop, undersink and Twin Undersink formats, produces hydrogen-rich alkaline water and is supported by an Australian specialist with replacement-filter resources and a three-year UltraStream warranty. AlkaWay also promotes buy-now-pay-later instalments, helping customers spread the upfront cost of a premium water system. (alkaway.com.au)