Showerhead Filters

Showerhead filters fit between the shower arm and the showerhead, or come built into a filtered showerhead, and they aim to reduce chlorine and some other substances in shower water. The first decision is whether you want to keep your existing showerhead and add an inline filter, or replace it with a showerhead that has a filter cartridge inside.

What the filter reduces is the next question. Most shower filters use media such as vitamin C, copper and zinc granules or activated carbon aimed at chlorine, and some claim to reduce chloramine, heavy metals or scale. Hot water and high flow limit how much any small shower filter can do, so check whether the maker's claims are backed by independent test reports. Shower filters do not soften water; hard water needs a water softener.

Fit and flow come next. Most filters use the standard thread for shower arms, but check for your fixture, and make sure the filter does not push the showerhead too low for tall people. Some filters restrict flow, so look at the rated flow and reviews about pressure. Among the 12 products that list item weight, most fall between 0.4 and 1.6 pounds, and 1 pounds is typical.

Cartridge cost decides the long term price. Cartridges typically need replacing every few months, so check the cost and availability of replacements before buying the housing.

Before buying, check the thread fit, the filter media and test claims, the cartridge life and price, whether thread tape is included, and the flow rate. Write the installation date on the cartridge, and run the shower for a minute after fitting a new one to flush loose media.

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