Is Sydney tap water safe to drink without a filter?

Yes. Sydney Water treats and tests the supply against the Australian Drinking Water Guidelines, and tap water across Berala and the wider network is safe without any filtration. Filters address taste, odour and sediment, not safety.

How much does an under-sink water filter cost installed?

A quality twin-cartridge system with its own dedicated drinking tap usually runs $300 to $600 installed. Single-stage units are cheaper but less effective, and elaborate multi-stage systems cost more without much extra benefit for most Sydney households.

How often do filter cartridges need replacing?

Once a year for most under-sink systems, at roughly $60 to $120 a set. Skipping changes is worse than having no filter, because an exhausted wet carbon cartridge can harbour bacteria. If yearly upkeep is not going to happen, a filter is the wrong purchase.

Will a filter fix discoloured water from old pipes?

A sediment cartridge will catch rust and grit at the kitchen tap, which improves what you drink, but it does not fix the underlying pipework. Persistent discolouration usually means corroding galvanised pipes that will eventually need replacing, and a filter only masks the symptom at one outlet.

Are jug filters just as good as an under-sink system?

Jug filters remove some chlorine taste and cost far less upfront, but they are slow, hold little water and rely on frequent cartridge changes people forget. An under-sink system filters at mains pressure at the point of use. For a single tea drinker a jug is fine; for a household, plumbed-in wins.

Is Sydney tap water safe to drink without a filter?

Yes. Sydney Water treats and tests the supply against the Australian Drinking Water Guidelines, and tap water across Berala and the wider network is safe without any filtration. Filters address taste, odour and sediment, not safety.

How much does an under-sink water filter cost installed?

A quality twin-cartridge system with its own dedicated drinking tap usually runs $300 to $600 installed. Single-stage units are cheaper but less effective, and elaborate multi-stage systems cost more without much extra benefit for most Sydney households.

How often do filter cartridges need replacing?

Once a year for most under-sink systems, at roughly $60 to $120 a set. Skipping changes is worse than having no filter, because an exhausted wet carbon cartridge can harbour bacteria. If yearly upkeep is not going to happen, a filter is the wrong purchase.

Will a filter fix discoloured water from old pipes?

A sediment cartridge will catch rust and grit at the kitchen tap, which improves what you drink, but it does not fix the underlying pipework. Persistent discolouration usually means corroding galvanised pipes that will eventually need replacing, and a filter only masks the symptom at one outlet.

Are jug filters just as good as an under-sink system?

Jug filters remove some chlorine taste and cost far less upfront, but they are slow, hold little water and rely on frequent cartridge changes people forget. An under-sink system filters at mains pressure at the point of use. For a single tea drinker a jug is fine; for a household, plumbed-in wins.

Guides

Are under-sink water filters worth it?

By Terry, licensed plumber (Lic L10959) · 23 April 2026 · 4 min read

Quick answer

Sydney tap water is safe to drink, so under-sink filters are about taste, not safety. They remove chlorine flavour and sediment picked up from older pipes. A twin-cartridge system costs $300 to $600 installed, with cartridges replaced yearly. Worth it for households that dislike the chlorine taste or have old internal pipework.

Are under-sink water filters worth it? - Terry's Plumbing, Berala

Start with the honest part: Sydney tap water is safe to drink straight from the tap. Sydney Water treats and tests the supply to the Australian Drinking Water Guidelines, and nothing about a Berala or inner west address changes that. Any plumber selling under-sink filters on health fears is selling the wrong thing. So why does Terry still install them most months? Because safe and pleasant are not the same thing, and because what happens between the treatment plant and your kitchen tap matters too.

What a filter actually fixes

Chlorine taste and smell. Chlorine keeps the supply safe on its way to you, and it does its job well, but plenty of people dislike the taste. A carbon filter strips it out at the last metre, after it has done its work.
Sediment and discolouration. Older streets and older homes, especially those with original galvanised pipes, can pick up rust and grit between the main and the tap. A sediment cartridge catches it.
Old internal pipework. Where the pipes inside a home are decades old, water leaving the meter in good condition can still arrive at the tap carrying traces of the journey.
Better tea, coffee and cooking, which sounds trivial until you taste the difference side by side.

What a filter costs

A quality twin-cartridge under-sink system, with a sediment stage and a carbon stage plus its own dedicated drinking-water tap, generally runs $300 to $600 installed. Single-cartridge units cost less but do half the job. Elaborate multi-stage systems with remineralisers and alkalisers cost more and, for most Sydney households, deliver little the twin setup does not.

The maintenance nobody mentions

Here is the part the sales brochures skim past: cartridges must be replaced, usually once a year, at roughly $60 to $120 a set depending on the system. A filter with an exhausted cartridge is worse than no filter, because a spent carbon block sitting wet for years becomes a home for the very things you were filtering against. If you know the yearly cartridge change will not happen, skip the filter. That is genuine advice from a plumber who would rather not install one than install one that gets neglected.

Who should bother, and who should not

Worth it: households that dislike the chlorine taste, homes with older internal pipework, serious tea and coffee drinkers, and anyone currently buying bottled water, since the filter pays for itself against bottled water within the first year.

Probably not worth it: renters who cannot modify the plumbing without permission, households perfectly happy with the taste as it is, and anyone expecting a filter to fix water hammer, pressure problems or hot water complaints, none of which have anything to do with filtration.

An under-sink filter is a comfort upgrade, not a safety device. Buy one for the right reasons, budget for the yearly cartridge, and it is a small luxury that earns its keep. Buy one out of fear and it is $500 spent solving a problem Sydney does not have.

Frequently asked questions

Is Sydney tap water safe to drink without a filter?: Yes. Sydney Water treats and tests the supply against the Australian Drinking Water Guidelines, and tap water across Berala and the wider network is safe without any filtration. Filters address taste, odour and sediment, not safety.
How much does an under-sink water filter cost installed?: A quality twin-cartridge system with its own dedicated drinking tap usually runs $300 to $600 installed. Single-stage units are cheaper but less effective, and elaborate multi-stage systems cost more without much extra benefit for most Sydney households.
How often do filter cartridges need replacing?: Once a year for most under-sink systems, at roughly $60 to $120 a set. Skipping changes is worse than having no filter, because an exhausted wet carbon cartridge can harbour bacteria. If yearly upkeep is not going to happen, a filter is the wrong purchase.
Will a filter fix discoloured water from old pipes?: A sediment cartridge will catch rust and grit at the kitchen tap, which improves what you drink, but it does not fix the underlying pipework. Persistent discolouration usually means corroding galvanised pipes that will eventually need replacing, and a filter only masks the symptom at one outlet.
Are jug filters just as good as an under-sink system?: Jug filters remove some chlorine taste and cost far less upfront, but they are slow, hold little water and rely on frequent cartridge changes people forget. An under-sink system filters at mains pressure at the point of use. For a single tea drinker a jug is fine; for a household, plumbed-in wins.

Related services

Need a hand from a real plumber?

Terry's been sorting plumbing across Berala and Western Sydney since 1986. Call 0415 274 542 for a straight answer and a fixed price.

Call 0415 274 542 Request a Callback

NSW Licence L10959 · 40+ years experience