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The BON 417-5140 is a union tailpiece fitting designed to connect a 2-inch male buttress thread on one end to a 2-inch male iron pipe thread (MIPT) on the other. This type of fitting is commonly found in pool and spa plumbing systems, where buttress-thread connections are standard on pump and filter equipment. It serves as an interface piece within a union assembly, allowing the plumbing loop to be broken down for service or equipment replacement without cutting pipe. Installation is typically performed by a pool service technician or licensed plumber working on circulation system components.
This tailpiece is suited for residential and light commercial pool and spa plumbing applications. It is used where equipment-side union connections meet threaded pipe runs, providing a removable joint at pumps, filters, heaters, or similar equipment. The buttress thread profile is standard in pool equipment unions, and the MIPT end threads into a female-threaded fitting or manifold port in the piping system.
Designed as an OEM-style replacement union tailpiece for 2-inch pool and spa plumbing systems using standard buttress-thread union assemblies.
Installation is typically performed by a pool service professional or licensed plumber. Shut off the circulation pump and relieve system pressure before disassembling any union connections. Apply thread sealant appropriate for plastic or PVC fittings on the MIPT end as required. Follow local plumbing codes when making threaded connections in pool and spa systems.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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