Designed to reduce issues with both water taste and quality, the P1-D Culligan whole house water filter is a genuine OE part that fits into systems that use 9-3/4 in. x 2-1/2 in. cartridges. Offered here in an economical 2-pack, these filters are resistant to bacteria and represent one of the most affordable way to ensure you continue to get great tasting, high quality water in your home. Order this 2-pack of P1-D Culligan whole house water filter replacement cartridges from us today.