Waterway 1-1/2" NPT Return Fitting [Metal Pool Wall Assembly] from Waterway Plastics is a replacement plumbing fitting used to connect, adapt, or secure water lines in compatible pool and spa systems. It helps maintain a clean, serviceable connection in equipment, suction, return, drain, or accessory plumbing layouts.Use part number 400-9010B for repairs where the existing fitting, nut, clamp, tailpiece, extender, or tubing component matches the listed size and style. Proper fit is important for leak prevention, service access, and reliable water movement. Supports pool and spa plumbing repair work Designed for compatible Waterway fittings and assemblies Helps replace worn, cracked, or missing connection parts Useful for equipment pad, return, suction, and accessory plumbing Confirm size, thread style, and connection type before ordering This item is best selected by matching the manufacturer, part number, connection style, and product dimensions to the existing assembly. For best results, inspect related gaskets, seals, unions, and fittings during repair so the system can be returned to dependable operation.