The PUR Plus Faucet Mount Water Filtration System has been engineered to deliver superior water filtration directly from your water faucet. Have confidence in your drinking water with PUR's powerful 3-in-1 filtration technology that reduces 10x more chemical & physical substances than Brita's leading pitcher filter. As the #1 selling brand in faucet filtration, ‡ PUR has been trusted for over 35 years because of its rigorous water filtration standards and certifications. PUR is the only brand offering faucet-mounted water filters that are certified by WQA and NSF to reduce 70 chemical & physical substances, including lead, from your drinking water. In addition to having confidence in cleaner, better-tasting drinking water, PUR has also engineered its PUR Plus Faucet Mount Water Filtration System to be easy to use. No tools are necessary, simply click the PUR water filter on to your faucet for cleaner water, on demand. It is also equipped with an on/off lever so you can easily switch from non-filtered water over to filtered water. This filtration system is great for homeowners and hydration enthusiasts to reduce contaminants in their drinking water for healthy hydration. It's perfect for home use or as an RV water filter on a vertical faucet. A filter change light ensures you'll always know when it's time to change your Genuine PUR Plus Faucet Mount Replacement Filter. Remember, compatible doesn't mean comparable. Only Genuine PUR Faucet Mount Replacement Filters are certified to work with the PUR Plus Faucet Mount Water Filtration System in Vertical, Grey. Engineered for superiority, PUR believes that everyone deserves clean, better-tasting drinking water. Disclaimers: Versus best-selling Brita pitcher filter OB03. Brita is a trademark of Brita LP. †Based on comparing a year’s worth of bottled water (16.9 oz) to a PUR system and 3 filters. ‡Based on Nielsen sales data for the 52 weeks ending 7/1/23.