Why Buy a Single, Twin or Triple Water Filter System?

If you’ve been considering a new water filtration system for your drinking water, this article is for you.

In this video, discover why choosing the right water filtration system—single, twin or triple—depends on your water quality needs. Whether you're filtering rainwater, tackling sediment or removing harmful chemicals like fluoride, learn how the right combination of filters can deliver the clean, safe water your home deserves.

NOTE: The Coldstream cartridge is no longer available at My Water Filter. We recommend Aragon or Disruptor as the best alternative.

There are plenty of reasons you would need either a single, twin or triple water filtration system to go under the sink or on the benchtop, and it all comes down to two things:

• What you need to remove from the water
• What your challenges are from the water

Once we are clear on that, we can put together a system to create the best water you can for your individual needs.

1) Starting with the easiest scenario, there’s not a lot that you need to do with it, especially if it's contained in a concrete water tank. When rain water is stored in a concrete tank, the lime in the water leaches out of the walls of the tank, elevating the pH of the acidic water up to neutral.

In this case, all you need to do is install a single stage water filter to remove the bugs, bacteria, metal from the roof, copper from the water pipes, herbicides and any pesticides that may have washed in from the roof.

The Ultrapure water filter with an Aragon cartridge would do the trick. That would remove all the bugs and block the sediment on the outside of the cartridge. Another great option is the Disruptor cartridge, which uses advanced filtration technology to remove over 98% of PFAS compounds like PFOA and PFOS, along with viruses, bacteria, heavy metals, chlorine and more, giving you incredibly clean and safe water.

If you have a concrete rain water tank, a single benchtop or single under sink water filter would be perfect for you.

2) However, if you have a lot of sediment in your tank or if you have an old tank, you wouldn't want your high-quality, expensive cartridge getting blocked up, so twin under sink water filters are the best solution for that.

This scenario requires you to have a prefilter cartridge in position one, and then you should have a quality cartridge like the Doulton, Aragon or Disruptor in position two.

The sediment pre-filter would block the sediment so that the expensive and high-quality cartridge can continue functioning properly without being blocked up.

3) Finally, if you have a whole house water filter or sediment filter treating all the incoming rain water before it flows into the house, you would also be fine with just a single-stage system.

If your water tank is made from steel, aqua plate, galvanised, poly etc, your water will remain acidic and require extra treatment before entering the home. If the water is not brought back up to at least a neutral pH, it can eat out the copper pipes and ruin your appliances and tapware.

Plus, you still need to treat the bugs and heavy metals from the roof.

In this scenario, the best setup is a triple water filter. Again, you can go with either an under sink or benchtop system. You should have a pre-filter in position one and then your high-quality cartridge in position two. This should take care of the bugs, heavy metals from the roof, herbicides and pesticides. Then in position three, you should have a cartridge to elevate the pH of the acidic water.

To raise the pH, you have a couple of cartridge options. You could use a Calcite carbon to elevate the pH to neutral 7 or an Alkahydrate cartridge that will boost the pH of the water up to 9, which would slowly come back down over time, and sit between 8 to 8.5 before it eventually needs replacing.

It’s best to have a triple system in your home to elevate the water if you’re on rain water.

If you live in a city, you’ll be dealing with completely different water. We'd like to say that you shouldn't have any sediment in your water, but because we cover the whole of Australia, that's just not the case.

Generally speaking, you can get away with just a single benchtop or single under sink water filter with an Ultrapure, Aragon or Disruptor cartridge—all of which are amazing for that scenario.

However, if you have a sediment issue, you can always have a sediment cartridge to protect your quality cartridge for peace of mind, as sediment cartridges are very cheap. If you want that peace of mind, go with a twin system with the sediment cartridge in position one and your quality cartridge in position two.

If the government pumps some dirty water down the pipeline and it comes into your home prematurely, the first cartridge will block it up. If the water slows, you simply need to throw out the pre-filter, put another cheap pre-filter in and your good cartridge should still be good to go.

In a nutshell, if you're living in the city, get a twin benchtop or under sink water filter, and you’ll be fine.

It may be suitable for teeth, but it’s terrible for your health. Many people are against it and want it removed. The problem is that it's not that easy to get out. Fortunately, we’ve found a top-quality solution from Omnipure in the USA—a cartridge that can remove up to 97% of fluoride from your water.

If you’re working with fluoride in a city scenario, we recommend putting your water through a fluoride cartridge first and then through a Doulton, Aragon or Disruptor cartridge.

For the best benchtop water filter cartridge, you may choose between a Doulton, Aragon or Disruptor. We’ve searched the world, and these are the best around. If you live in the city and want to avoid drinking fluoride, your best bet is an under sink water filter—or the triple benchtop system as a solid alternative.

This can be a pre-filter or fluoride in position number one, a quality filter in position two to take out the nasties, chlorine, chloramines, herbicides, heavy metals, etc. Then a cartridge to elevate the pH in position three.

Because the Australian government pumps copious amounts of lime in the water to protect all the pipework, city water is normally always above a pH of 7.

If you want to elevate it higher, you can use the Alkahydrate cartridge, which is packed full of mineral that brings your water up to a pH of about 9 to 9.5, which drops back to 8 to 8.5 over time.

No matter where you live, whether it's rural or in the city, if you’re on rain water or city water, a benchtop or under sink water filter is a necessary investment in the future health of your family.

Remember, a healthy family is a happy family!

If you still have further questions before deciding whether to purchase a single, twin or triple system for a benchtop or under sink water filter, feel free to contact us. We’d be delighted to help.