Under Sink Water Filters

Under sink water filters give you filtered water on tap — plumbed directly into your kitchen's cold water supply and dispensed through a dedicated filtered-water tap on the bench. There's no tank to refill, no gravity required, and no visual clutter on your bench. Awesome Water Filters stocks a range of undersink filter systems, including single-stage, twin-stage, and multi-stage configurations, plus genuine replacement cartridges.

Browse the full range below or use the category filters to find the system that suits your kitchen and water quality needs.

How Does an Under Sink Water Filter Work?

An undersink filter connects to your cold water supply line beneath the kitchen sink. Water passes through one or more filter cartridges housed in filter canisters, then flows to a dedicated tap mounted on your bench or through the sink. The filter cartridges remove or reduce various substances depending on the media used — common types include sediment filters, activated carbon block filters, and fluoride-reduction filters.

Unlike gravity-fed benchtop filters, undersink systems deliver filtered water on demand without any manual refilling. Flow rate depends on the system design and your incoming water pressure.

How to Choose an Under Sink Water Filter

When comparing undersink systems, consider the following:

• Number of filter stages: More stages typically means more filtration steps. A single-stage system may focus on sediment or chlorine taste; a multi-stage system may include sediment, carbon, and additional media in sequence.
• Filter media: Carbon block filters are effective at reducing chlorine taste, odour, and certain organic compounds. Ceramic, KDF, or specialist cartridges target additional substances — check the product specifications and any available test data.
• Flow rate and pressure: Check that the system's flow rate suits your usage. Higher-flow systems are better for busy households.
• Cartridge replacement schedule: Most undersink cartridges need replacement every 6–12 months. Factor in the ongoing cost of replacement cartridges when comparing systems.
• Installation: Undersink filters require connection to the water supply. In some Australian states and territories, connection to mains water lines must be performed by a licensed plumber. Check your local requirements before self-installing.

Under Sink vs Benchtop vs Reverse Osmosis — What's the Difference?

Undersink filters, benchtop gravity filters, and reverse osmosis systems all filter your drinking water, but they differ in how they're installed, how much water they treat, and what they're designed to remove. Gravity-fed benchtop filters need no plumbing but require manual refilling. Undersink filters provide filtered water on demand but require under-sink installation. Reverse osmosis systems go further in removing dissolved solids, using a semipermeable membrane in addition to pre- and post-filters, but also require under-sink installation and produce some waste water. See our Reverse Osmosis Water Filters collection for RO options.

Frequently Asked Questions

Do I need a plumber to install an under sink water filter?

Most undersink water filter systems require connection to your cold water supply line. In some Australian states and territories, work on mains-connected plumbing must be carried out by a licensed plumber — check the regulations in your state before proceeding with self-installation. Some PNP (push-and-plug) or quick-connect systems are designed for easier DIY installation where permitted.

How often do I replace the undersink filter cartridges?

Most undersink filter cartridges are replaced every 6–12 months, depending on your water quality and usage volume. Systems with multiple stages may have cartridges with different replacement schedules. Check your system's user manual and keep a calendar reminder.

Will an undersink filter reduce chlorine taste in my water?

Most activated carbon block undersink cartridges are designed to help reduce chlorine taste and odour. Performance depends on the cartridge condition, your incoming chlorine levels, and flow rate. Replace cartridges on schedule to maintain effectiveness.

Can I use an undersink filter with bore water or tank water?

Undersink systems designed for town water supplies may not be suitable for bore, tank, or significantly untreated water sources without pre-treatment. If your water source is not a treated town supply, seek advice on the appropriate pre-treatment and filtration approach for your specific water quality.

Shop Related Categories

• Replacement Water Filter Cartridges
• Reverse Osmosis Water Filters
• Benchtop Water Filters
• Whole House Water Filters
• Water Filters Australia