Stenner Suction Line Strainer [Series 45/85/100/170 3/8"] (ST138) is a suction line strainer for compatible Stenner Series 45, 85, 100, and 170 chemical feeder systems. Installed on the suction side of the feed line, the strainer helps reduce the chance of debris entering the tubing and pump head from the chemical tank. This makes it a valuable service part for maintaining cleaner chemical delivery and protecting the pump’s internal feed components. As chemical tanks are refilled and used over time, small particles or residue can collect at the bottom of the container. A properly functioning suction strainer helps keep the feeder line clearer, supporting steadier draw and more dependable dosing. This 3/8" Stenner strainer is useful for preventive maintenance, tank line replacement, or restoring a feeder that has become restricted. Suction line strainer for compatible Stenner chemical feeder pumps Helps limit debris entering the suction tubing and pump head Designed for 3/8" line applications as noted in the product title Useful for pool, spa, and water treatment chemical feed systems Part number ST138 helps simplify replacement matching