The Pentair 154538 2" Bulkhead Gasket is a critical component designed to ensure a secure and leak-free connection in water filtration systems. Made for durability, this bulkhead gasket features an outside diameter (OD) of 3" and an inner diameter (ID) of 2-3/8" , making it ideal for sealing connections in both cartridge and sand filters. It is engineered to provide a tight, reliable ... https://www.usapoolshop.com/154538-pentair-2-bulkhead-gasket