How to replace your inline water filter

Replacement takes around 10 minutes and requires no specialist tools. Most households replace this cartridge every 6–12 months, depending on water quality and usage. We recommend checking it at least every 6 months.

1. Turn off the water supply Locate the shut-off valve under your sink and turn it off before starting.

2. Disconnect the old cartridge Squeeze or release the push-fit connectors on each end of the existing cartridge and pull the tubing free. Have a small container or cloth handy — a small amount of water may release from the lines.

3. Connect the new cartridge Push the tubing firmly into the connectors on the new FSINLINE cartridge until you feel it click into place. Check the flow arrow on the cartridge body is pointing in the direction of water flow toward your tap.

4. Turn the water back on and flush Restore the water supply and run the filtered tap for 2–3 minutes to flush the new cartridge before drinking.

If your flow rate drops noticeably before 6 months, the cartridge may be exhausted early due to high sediment load in your local supply. Replace it sooner rather than waiting.

Inline filter 1 micron vs 0.5 micron

Both filters use a carbon design and reduce the same things: chlorine, sediment, fine particles, tastes, and odours.. The difference is filtration fineness.

The 1 micron filter (FSINLINE) captures particles down to 1 micron. It delivers strong everyday filtration for most NZ households on town water, with a flow rate of 2.8 litres per minute.

The 0.5 micron filter is a 2 part filter with a carbon block and captures finer particles, providing a higher level of particulate reduction. It suits households that want finer filtration and a longer filter cartridge life. 

For most homes on standard NZ town water, the 1 micron cartridge performs well and is the correct replacement for the KFINLINETAP system. If you are unsure which micron rating your system or home requires, check your original system documentation or contact us.

Is this the right cartridge for my system?

The FSINLINE 1 micron cartridge will fit any inline water filter system that uses standard 6mm push-fit (quick connect) fittings. This is the most common inline fitting size used in under-sink filtration systems.

Looking for the complete kit? If you don't yet have a filtration system installed, the DLM Wallace Inline Filter & Tap includes this cartridge, a stainless steel tap, pressure reducing valve, and all fittings — ready to install under your kitchen sink.