The water filter market is saturated with competition and whichever type of water filter you’re looking to buy, you’ll be met with an abundance of options. It’s difficult to decide on a brand or a filter model, especially if you’re new to the topic of water filtration. Choosing a reverse osmosis water filter is all the more difficult, given that there are systems with different filtration stages, membranes, filtration capacities, etc. To help you get more familiar with your options and understand the differences you may encounter in your search for a reverse osmosis water filter, we’ve complied a quick RO filter buying guide that you can consult while you’re trying to find the best reverse osmosis filter for your home.

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RO filter buying guide quick facts

There are certain questions that you need to address before buying any RO filter for your home, office, restaurant or dental practice:

  • What is my water supply like?
  • What is my water pressure like?
  • How much space do I have?
  • What is my budget?

Water quality and pressure

By answering the questions related to the quality of your water, you’ll know what contaminants you need to remove from your tap water, and this will give you further information about how many filtration stages should your RO system have or whether or not you need an alkaline filter too. If your tap water has many sediments, it’s chlorinated and acidic, you may want to look into a reverse osmosis filter that is equipped with sediment pre-filters and activated carbon filters that can help reduce sediments and get rid of chlorine from your water supply. This will not only improve the overall quality of your tap water, but it will also make sure your RO membrane will not clog and stay in top shape. If your tap water is acidic in its unfiltered state, you’ll need to invest in a reverse osmosis system that contains a remineralizer filter or alkaline filter as well. RO produces slightly acidic water, so an alkaline filter can replenish your water with trace amounts of healthy minerals that were removed during the filtration process, thus, correcting the pH balance of your RO water.

If your water pressure is not at optimum levels (look for the water pressure requirements of the RO system you’re thinking of buying), you’ll need to invest in a system with a booster pump.

Space and budget considerations

The size of an RO filter depends on many factors (how many filters it contains, how big is the RO storage tank, etc.), but you need to make sure you have enough space wherever you’re thinking of installing it.

Another aspect to consider is your budget. There can be very huge price differences between RO systems depending on their intended purpose, filtered water output, complexity, etc. Commercial RO systems can be double or even triple the price of domestic water filters, but they also have an hourly filtered water output that can amount to hundreds of litres of water. You also need to think about maintenance costs, which usually mean the costs of replacing the pre and post-filters and the RO membrane. It’s a good idea to run the numbers and see how much you’ll need to spend annually on filter replacements.

In a nutshell, these are the most important aspects to consider before buying a reverse osmosis filter. Hopefully, we’ve managed to make your search for an RO filter a little less daunting and a little more efficient.