The Tier1 catalog offers a wide range of products designed for every room in your home. Beyond whole house systems and filters, we carry solutions for air, fridge, pool and spa, as well as humidifier filters, inline filters, reverse osmosis systems, undersink filters, shower and bath filters, and an array of parts and accessories. Whether you’re in need of a point-of-use filter for your kitchen or bathroom, or replacement o-rings and lubricant for your whole house system, Tier1 has everything you need to keep your home running smoothly.