The complete guide
Whole House Water Filters, Explained Simply
The problem with treating one tap at a time
Most people start with a jug filter, then move to something under the kitchen sink. Both work on one point in the house. The kitchen tap gets attention and the rest of the home carries on as it was. The shower still smells of chlorine on the days the supply is dosed a little harder. The laundry still runs whatever came down the street. If the thing bothering you is sediment in the lines or the smell of chlorine when the hot tap runs, fixing one outlet only fixes one outlet.
A whole house water filter takes a different approach. It sits at the point where mains water enters the property, before the pipework splits off, and treats the supply once. Everything downstream draws from that same filtered line. Plumbers call it a point of entry system. For a household that wants the same water at the bathroom as at the kitchen, it is the simpler arrangement.
How a triple stage water filter system works
This unit runs three cartridges in a row, and the order matters more than people expect.
The first stage is a 5 micron washable pleated sediment cartridge. Pleated means it has a folded surface, which gives it more area to catch material before it blocks. Washable means you can rinse it with clean water when it starts looking loaded and get more life out of it. It takes the coarse material first so the stages behind it are not wasted on grit.
The second stage is a 5 micron poly spun sediment cartridge. Same micron rating, different construction. Spun cartridges tend to catch particles through their depth rather than just at the surface, so they pick up the finer material that got past stage one.
The third stage is a 0.5 micron coconut carbon block. This is the finest cartridge in the set, and it is the one aimed at chlorine taste and odour. Putting it last is deliberate. If a carbon block sat at the front of the line it would spend its working life clogged with sand, and you would be replacing it far sooner than you should need to.
Together those three stages are designed to reduce sediment, particles and chlorine taste and odour. That is the job. This is a mechanical and carbon filter system, and the water it treats should already be drinkable mains water going in.
What the numbers mean for your house
Three figures decide whether a filter suits a property.
Flow rate is the first. This system is rated at a maximum of 30 litres per minute. That is the ceiling for the whole house, not per tap, so think about what runs at once in your home. A shower going while the washing machine fills is the usual test case. A plumber can look at your fixture count and tell you quickly whether you are comfortably under that figure.
Pressure is the second. Maximum operating pressure is 90 psi, about 620 kPa. Plenty of streets run below that, but some run higher, and high mains pressure is hard on fittings generally. If yours is above the limit, the fix is a pressure limiting valve upstream, which a plumber fits as part of the job.
Temperature is the third. The maximum water temperature is 42 degrees Celsius, which tells you this belongs on the cold mains. It goes in before the hot water system, not after it. Your hot water still ends up filtered, because the hot water unit is fed from the same filtered cold line.
Who it suits, and who it does not
It suits a standard household on drinkable mains (town) water that wants sediment and chlorine taste and odour reduced at every outlet rather than one. If you have noticed grit in tap aerators, or you dislike the smell at the shower, that is the territory this product is built for.
It does not suit a property running on tank, bore or dam water. Those supplies have their own requirements and need advice from someone who has looked at the actual water. It is also not a hot line product, and it is not something to fit to a supply that is not already drinkable.
Renters should think carefully too. This is a permanent fixture on the mains line that requires a licensed plumber, so it is a job for owners or for tenants with written permission from the landlord.
Choosing and sizing, without the guesswork
Start by finding where your mains enters the property, because that decides the install position and how much space you have. The unit measures 37 cm x 15 cm x 37 cm high and weighs 5.25 kg before any water goes in it. It needs a solid wall or frame, which is what the heavy duty mounting bracket is for.
Then look underneath the proposed spot. You need room to unscrew and lower a 10 inch housing when a cartridge is due. Installers who ignore this end up creating a maintenance headache, and a filter that is painful to service is a filter that quietly gets neglected.
Check the connections next. The ports are 3/4 inch brass threaded, and your plumber will adapt from your existing pipework. Brass is used here because it tolerates being tightened and loosened repeatedly over the years, which the plastic equivalents do less well.
One more point worth repeating, because it is the step people try to skip. Installation must be done by a licensed plumber. Mains work is regulated, and getting it wrong in a wall cavity or under a house is an expensive mistake. The system itself carries WaterMark certification as stated by the maker, which is the kind of thing a plumber will want to see on the paperwork.
Living with it, month to month
The honest truth about any cartridge filter is that it is only as good as its last cartridge change. The maker rates each cartridge for up to 12 months, with the caveat that your water quality and household use will move that figure either way. Heavy sediment and a big household will shorten it.
Write the install date on the housing with a marker, or set a reminder. When the day comes, isolate the water supply, release the pressure, drop the housings and swap the cartridges. Check the double O-rings for grit while everything is open, reseat them cleanly, then flush the system through until the water runs clear. That flush matters after a carbon block change, since new carbon sheds a little fine dust at the start.
Between changes you can rinse the stage one pleated cartridge if it looks loaded. When a rinse stops restoring flow, replace it. Falling pressure around the house is usually the sediment stages telling you something, not a fault with the system.
Keep the housings clean with a damp cloth only. Solvents and abrasives damage the plastic and can weaken the seals. If the unit is mounted outside, shelter from direct sun will do it a favour over the long run.
The short version
A whole house water filter is the practical option when you want every tap and shower drawing from the same filtered line instead of treating one sink. This triple stage water filter system pairs two sediment cartridges with a 0.5 micron carbon block, designed to reduce sediment, particles and chlorine taste and odour from drinkable mains water. It runs up to 30 litres per minute, up to 90 psi, up to 42 degrees Celsius, on standard 10 inch x 2.5 inch cartridges with 3/4 inch brass ports.
Mount it somewhere solid with room to work underneath, change the cartridges on schedule, and get a licensed plumber to put it in. Do those three things and it will sit there quietly doing its job.