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Advantages of Undersink Water Filter System

Advantages of Undersink Water Filter System

Advantages of Undersink Water Filter System are many. They save space on the kitchen bench while giving you an unlimited supply of chilled filtered water. They are also cost effective and the filters are easy to replace. The under sink water filter system needs to be installed by a licensed plumber, but well worth the process.

Click here to find out how to service a undersink water filter system yourself, easy as.


What is an Undersink Water Filter System?

Undersink water filters work on a very simple principle – they are placed under the sink (ie  a kitchen sink) and a diverter valve diverts the cold water from the Mains water pipes to the filter before it has reached the sink faucet. The water goes through the filter system and goes out through a separate faucet for filtered water that is placed on the sink or kitchen benchtop, somewhere near its standard faucet.

Why install an Undersink Water Filter System?

Saves space in the Kitchen

Under counter water filters are your best option if you don’t have enough space to accommodate a large water filter system or Benchtop Filter System. Given that they are installed under your kitchen sink, they don’t take up useful space in your kitchen and they stay out of sight. These days there also Quick Change Filter Systems, using slimline filters which take up even less room than the Standard Twin Filter systems (10” x 2.5”)

Constant supply of filtered water

Being Undersink and Mains connected, water is readily available  and chilled (if optional water chiller is installed)

Simple to replace filters

Another advantage of Undersink Water Filter Systems is the fact that they don’t need complex maintenance work to keep them performing properly. Apart from the regular filter replacement (12 months usually), you don’t need to do anything else. Most 10” x 2.5” filters last 12 months or more depending on water quality and usage. Filters are also readily available from any reputable Water Purification business.

Cost Efficiency

Under-counter filters (10” x 2.5”) are one of the most affordable filters on the market both in terms of initial purchase costs and maintenance costs. There are also, an ever-increasing selection of filters available, capable of removing Lead, Fluoride, Chloramines, etc apart from the standard Dirt, Rust and Chlorine

What are the health advantages of a Water Filtration System

Increase the hydration levels

Water is the best liquid to drink health-wise.

Both through removing unhealthy contaminants as well as by often adding healthy minerals. A great under sink water filter can significantly improve the quality of your tap water.

In all households, it is of the utmost importance to have a high quality source of drinking water. Chlorine and Fluoride can cause issues for people with skin conditions and other medical conditions. So to be able to remove one or both is a step in the right direction.

Things to consider when choosing an Undersink Water Filtration System

Cost of replacement filter/filters

Not only are the majority of replacement filters relatively inexpensive. They are going to save you money on regularly having to purchase bottled water. They are also generally more efficient than other types of water filters such as faucet filters or fridge filters, although it depends on the quality of the brand and the model as well.

Availability of filters

Industry Standard size 10” x 2.5”, 10” x 4.5” and 20” x 4.5” filters are readily available from any reputable Water Purification business, as well as most Hardware stores these days, plus available Online.

Installation and servicing concerns

Generally speaking, any Undersink Water Filter system should be installed by a qualified Plumber, for warranty purposes. Servicing and replacement of filters can be performed by any person confident of doing so.

Basically you just need to isolate the supply of water to the system with the supplied ball valve or isolation valve, relieve any water pressure in the housings by turning on the faucet. Then you’re able to work on the unit either undersink or, if possible, disconnect the tubing from both ON and OUT ports. And put the system up on the sink bench to work on. The housings undo anti-clockwise from the bottom (housing spanners are available which give more leverage when undoing filter housings). Once the housings are undone. Remove the old filters, clean the inside of both housings and install replacements. And connect the system back up and flush it for 30 seconds or more. Or until the black loose carbon and any air bubbles disperse


There are multiple types of Undersink filter systems available. From single and twin Undersinks to Reverse Osmosis units. Not all systems are perfect. And in some situations a Benchtop water filter, Standalone Purifier or a Whole of House water System might do a better job. However, a high quality under sink water filter is without a doubt a great addition to a lot of kitchens. And will drastically improve the health and comfort of you and your family.