Culligan Whole House Standard-Duty 3/4 in. Water Filter System is designed to protect your home by trapping sediment and reducing scale in your water supply. This standard-duty water filter features a 3/4-inch inlet and outlet along with a pressure relief valve, making it easy to install and maintain. It helps safeguard your appliances, faucets, and plumbing from potential damage caused by impurities in your water. The system includes the HF-150A housing, an OR-34A O-ring, and installation instructions, ensuring a straightforward setup process for homeowners seeking reliable water filtration. Model Number: HF-150A