21x23x1 Merv 11 Universal Air Filter By Tier1 (6-Pack) DO NOT SELL WHEN OOS and where possible use eco-friendly

and where possible use eco-friendly recycled materials

Continuous Maintenance - use with an Easy Feeder® System for automatic

Any plumber can furnish and install a water arrestor or a DIY version is available from your local home store if you want to install the water hammer arrestor yourself

A Filtrete filter helps keep the air in your home clean by reducing airborne allergens and particles that contribute to poor air quality

non-pleated varieties

21x23x1 Merv 11 Universal Air Filter By Tier1 (6-Pack) DO NOT SELL WHEN OOS and where possible use eco-friendlyOur Tier1 21x23x1 Air Filter MERV 11 comes in a 6 Pack. These pleated high capacity filters are constructed using electrostatically charged filter media. This 100% synthetic material offers significantly higher particulate efficiency than typical poly cotton media pleated filters, and captures the smallest and most troublesome airborne particles and allergens, such as particles that carry viruses and bacteria, pollen, mold spores, fine dust and pet