Pur Water Filter Replacement Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

PUR is the best-performing pur water filter replacement brand in July 2026, moving 39,000 units across 6 ASINs for 54.2% of Top 10 volume. ZeroWater follows with 20,000 units (27.8%), ahead of AQUA CREST on 9,000 units (12.5%).

With 4 brands splitting the Top 10 and 94.4% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $15.99 to $31.06, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. On the growth side, B001CUQ1C8 leads positive momentum with ▲ 100.0% MoM growth on 20K units, with B09T6G66NL close behind at ▲ 100.0% MoM on 2K units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.