On Tap Water Filters vs. Under Sink Water Filters: Which is Better?

Wondering whether on tap water filters or under sink water filters are best for your needs? Here on tap water filters will be going head to head with undersink water filters. We’ll tell you the pros and cons of these water filtration systems to help you decide which one is best for you.

On Tap Water Filters Pros

One of the reasons why on tap water filters are so popular is that they easy to install. Some, if not most of these filters attach easily on to the head of a faucet and can filter out approximately 378.54 litres of clean water.

Because they are easy to install, you don’t have to hire a plumber to install them. This means additional savings on your part. Also, this water filter system will allow you to stop filtering water any time you want to, since they are also easy to detach from your faucet.

Also called faucet water filtration systems, these devices are commonly cheaper than under sink water filters. If you do a quick search on Amazon, you will see that many of these water filtration systems may cost as little as $50.

If you’re looking for a short term improvement to water quality (such as a caravan or holiday home), an on-tap filter may suit you best.

On Tap Water Filters Cons

While ontap water filters look like great products, these filter systems still receive different negative reviews. In a post by Water Filter Magazine, the website noted some of the cons of 6 of the best faucet water filters.

One of the most common complaints that these filters have relates to durability. Some ontap filters have plastic housings which can easily break. Also, running hot water into the system can ruin some of these systems.

Another disadvantage is that you have to change the filter cartridges much more often than you would an undersink water filter. For a household of 3 that consumes about 22.71 litres of water every day, you will more likely have to change your water filter in approximately 30 days. Of course this will vary depending on your use and the capacity of your faucet water filter.

Many mixer taps cannot handle the additional weight of an on tap filter, hence their warranty often specifically excludes liability for any issues if an attachment has been added to the spout.

On tap water filters rarely give you much detail on what contaminants they remove (nor what they don’t remove!), so it’s hard to know exactly how much benefit they offer. You might get a good one, or you might not.

Under Sink Water Filters Pros

Under sink or under bench water filters offer a much wider way of filtering water. For example, the Plumm MF-400 undersink water filter can filter out contaminants down to 1 micron. Aside from being able to filter out water particles like sand and dirt, and improve the taste and odour of water, this water filter system can also eliminate cysts such as Giardia and Cryptosporidium.

Some under sink water filters will also offer scale reduction, which is important in areas using hard water which is drawn from an underground source.  This is most noticeable when using tap water to fill a kettle or steam oven.

In terms of durability, most under sink filters can withstand a maximum pressure amounting to 680 kiloPascal. These water filters can also operate splendidly under temperatures ranging from 2 to 58 degrees Celsius. These filtration systems also have significantly longer lifespan than on tap water filters because of their sturdier construction.

A good quality under bench filter from a reputable manufacturer will be WaterMark approved, which is usually a legal requirement. This can be verified by contacting the manufacturer or finding the trademarked ‘W’ on the system, with a license number.  This means it is fit for purpose - whereas there is no such legislation for on-tap filters.

Under sink water filtration systems also provide higher flow rates than on tap filters. Since these filters have large water filter cartridges, replacement intervals can be as long as 12 months, and you can often carry out replacement yourself. This saves a lot of time and effort on your part.

Under Sink Water Filters Cons

Although they are a more economical choice over whole house water filters, it is still a fact that under bench filters initially cost more than on tap filters, and the water filter cartridges used by these systems also cost more.  However they are generally a much longer-lasting solution, so the total cost per litre of water is likely to be much lower.

Also, since these water filter systems are a bit more sophisticated than faucet filters, installing them is not as easy. You may need to hire a professional or licensed plumber to install these systems for you.

Lastly, unlike faucet filters, these water filters are generally permanent. Once they are installed they tend to stay there, and some users feel like they are ‘tied’ to a particular system because of this.  However, if you use a system like the Plumm MF-400, you can simply remove it and reconnect the tap to the cold water outlet once again - ideal for rental properties.

With these pros and cons, you should be able to choose which water  filter system fits your needs. However, if you are still undecided, feel free to give us a call at 1300 250 260 or contact us using our website’s chat app. We will be happy to help you make the right choice!


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