Written by: Alexandra Uta // Last Updated: Jun 23, 2023
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RO UV water purification combines reverse osmosis filtration with ultraviolet water disinfection.
It’s a super effective combo, but it’s not always necessary. So how do you know when you need it?
This article will explain when you need an RO UV system and its pros and cons among other things.
Key Takeaways
Reverse osmosis technology is used to purify water that’s heavily contaminated and unfit for drinking. It’s often recommended for homes with serious water issues like heavy metal contamination and high TDS levels (total dissolved solids). Reverse osmosis also comes in handy when dealing with contaminants that most filters can’t handle, like arsenic or fluoride.
On the other hand, UV water purifiers are used to tackle microbial contamination. They’re renowned for being one of the safest and easiest ways to clear water of harmful microorganisms. So they’re your best bet for killing pathogens like bacteria and viruses.
Now, back to reverse osmosis: You wouldn’t usually need an RO system unless your water supply quality is pretty bad and you are facing several different types of contaminants.
But while reverse osmosis eliminates up to 99% of all impurities in water, you can’t trust it to remove all microorganisms – which is necessary because even small amounts of certain waterborne bacteria for example can already make you sick. The solution is an RO UV system that combines RO and UV purification to achieve the best filtration outcome.
But remember, not everyone needs to get an RO UV system. The only way to know if you need one is to get your water tested. Tests show you the current state of your water supply and give you insight into what treatment method would be best. So if your water test results come back with heavy metals, nitrates, arsenic, chemicals, etc. and microbial contamination, you’ll benefit from an RO UV water system for sure.
By the way, RO UV systems come as point-of-use and whole house water filters.
UV is sometimes necessary with RO, but we can’t say it’s always necessary. Remember, the right water treatment method depends on the water’s quality. So, UV is only necessary with reverse osmosis when the water has serious microbial contamination.
A water test will reveal if you need to combine a UV system with your RO. A large part of why RO + UV systems work so well against microorganisms is that the RO system first removes the solids that said microorganisms could hide behind, ensuring that the UV light hits and kills all of them.
Ordinarily, municipal water should be safe enough without UV disinfection. Strict regulations ensure that the water supplied to homes meets the requirements for microbe population. Chlorination and other treatment methods are used to achieve that.
However, you can’t always guarantee the safety of municipal water, and getting an RO UV system could serve as extra protection. Your municipal water may need additional purification when:
An RO UV system could protect your municipal water in any of the above situations, making it a worthy investment.
An RO UV purifier is a system that combines reverse osmosis water purification with UV water disinfection. The UV purifier (UV lamp) comes after the RO system, working as a post-filtration stage.
RO tackles the issue of dissolved and floating organic + inorganic contaminants, while UV purification deactivates and kills microorganisms like bacteria and viruses.
Since RO + UV is typically required when the water has high TDS levels and microbial contamination, the filters often have several stages of purification, usually depending on the brand.
The various pre-filters and the RO membrane are placed before the UV purifier, ensuring the water is particle free, so the UV light works effectively.
A typical RO UV filter will have the following stages:
RO UV filters can remove a broad spectrum of water contaminants:
Like every other technology, RO UV water treatment has both benefits and disadvantages. Here are some that are worth noting.
If you have any thoughts about the question, is RO UV required, please don’t hesitate to leave a comment below!
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