10 Water Filter Buying Mistakes and How to Avoid Them

If you live in a developed country, you likely have treated tap water. That does not mean every system meets every standard every year.

In the U.S., more than 25 million people get water from systems that have missed federal health standards. Contaminant levels vary by city.

Buying the right home filter takes a little homework. This article covers ten common water-filter buying mistakes.

Skipping the Water Test

Some people buy a filter without knowing what is in their tap water. Marketing or a bad taste is not enough.

Not all filters do the same job. Some mainly reduce sediment. Others target lead, arsenic, other heavy metals, and pharmaceuticals.

Test first, then match the filter to those results. Start with our water quality quiz.

Failing to Research Performance Data

Look at performance data before you buy.

Good companies publish it. Check:

• Which contaminants were tested
• Levels before and after filtration
• Independent third-party testing
• Whether testing follows NSF methods for the claims being made

NSF International tests products against public-health standards. Be cautious of brands that hide data.

Relying Solely on a Pitcher Water Filter

Pitchers often improve taste. Many do not reduce lead or PFAS well.

Lead can affect children. PFAS are persistent chemicals. Check whether a pitcher is actually tested for those contaminants.

Failing to Research Filtration Technology

Common home technologies include reverse osmosis, carbon gravity filters, and other membrane systems. See how a Berkey water filter works.

If the spec sheet is thin, call and ask.

Believing Misleading Claims

Ads sometimes claim a filter removes 99.9999% of “growth,” or 100% of dissolved solids, or that a product is U.S.-made when it is not. See examples of bad claims in this USA Today roundup.

Match claims to lab data.

Do Not Buy Knock-Off Filters

Replacement elements wear out. Buy the official element for your system. Knock-offs are often untested.

For Berkey systems, official replacements are the Phoenix Gravity New Millennium Edition filters.

Ordering the Wrong Size

Systems range from about a quart to six gallons. Match household size and counter space. An RV or small kitchen usually needs a smaller unit.

Only Relying on Personal Recommendations

A friend’s review is a start. Still check test data and filter life.

Not Understanding Filter Maintenance

Wash chambers and the spigot with mild soap. Stainless exteriors can be wiped with vinegar and water. Scrub elements with a pad and cool water every few months, then re-prime.

Maintenance helps flow. Elements still need replacement. See how long water filters last.

Choosing Price Over Quality

Compare features and test data, not price alone. A cheap filter can mean weak reduction and frequent replacements.

No More Water Filter Buying Mistakes

Test your water, read the data, pick the right size, and budget for official replacements.

Order a Berkey online or call 1-800-392-3321.