Culligan 1 In. whole house water filter. Use this system to help protect all of your home's plumbing and appliances from sediment and scale. Utilizes stainless steel reinforced plumbing connections. System includes filter life indicator, built in bypass and shutoff valve, wrench, and mounting bracket Easily upgrade your filter to meet your specific water quality needs for either city or well water. Adheres to NSF (National Sanitation Foundation)/ANSI (American National Standards Institute) 42, 372 and CSA (Canadian Standards Association) B483.1 for whole house water filtration.