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And although they don’t go “WOOF!” or like to cuddle, they do love to fetch pristine drinking water for you and your family.

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Remember to have your water professionally tested at least once a year to make sure that your RO filter is still doing its job.

Some RO systems also include a remineralization filter that adds healthy minerals, like calcium and magnesium, back into the water.

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By the time your water reaches the RO membrane, it’s in the perfect condition to be transformed into pristine drinking water.

The RO membrane’s job is to remove lead, arsenic, BPAs, pesticides, and all the other contaminants that cause cancer and destroy your health.

Cloud Water Filters use built-in software to track water usage and automatically ship replacement filters right to your door.

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Together, the sediment and carbon pre-filters lighten the load for the next phase, the RO membrane, so that it takes less of a beating, lasts longer, and performs at its best.

Large families tend to burn through more filters, and whole-house systems need  replacements more often than under-sink systems.

This shouldn’t come as much of a surprise, but if you use your RO system all day, every day, the filters are going to wear out faster.

For now, let’s look at the different filtration stages so that you can have a clearer picture of what’s going on inside...

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It's important to change your RO membranes regularly to ensure they're still working properly and keeping your water free of contaminants.

Healthy RO systems can remove up to 99.9% of harmful contaminants, including everything from nuclear particles and pesticides to bacteria and parasites.

RO systems are organized in stages that take care of the big, chunky pollutants first, then remove the nastier, micro-sized pollutants last.

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They get gunked up with all the nasty stuff they’ve been trying to remove, and those particles leach back into the water.

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If you don’t notice any of these signs, it’s still a good idea to get your water tested by an EPA-certified lab at least once or twice a year. They’ll test for a full panel of contaminants, including things like BPAs that aren’t even tested for at most local treatment plants.

Every corrosive, filthy particle in your pipes meets the sediment filter head-on. After that, the carbon pre-filter still has to combat stuff like pesticides and lead.

RO systems incorporate several kinds of filters, and each one lasts anywhere from six months to two years before having to be replaced.

And if you’re from Detroit, Newark, Milwaukee, or anyone of the other worst cities for water quality, your RO membrane is going to have to work double-time to remove lead, copper, bacteria and PFAs.

WARNING: Don’t rely on do-it-yourself tests or TDS (total dissolved solids) meters. They’re inaccurate, unreliable, and don’t give the full picture of what’s in your water.

From there, the water flows through an activated carbon pre-filter. It’s job is to remove chlorine and other disinfectants as well as be a first line of defense against toxins.