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The BK 164-104 is a 3/4-inch threaded Schedule 80 PVC union designed for use in pressure piping systems where reliable, serviceable connections are required. Schedule 80 PVC wall thickness provides greater pressure tolerance than standard Schedule 40 fittings, making this union suitable for applications where system pressure and chemical resistance are priorities. Threaded ends conform to ANSI B2.1 standards for consistent fit with compatible threaded pipe. The union design allows the joint to be broken and re-made without cutting pipe, supporting maintenance and equipment isolation tasks. Gray color is standard for Schedule 80 PVC fittings.
This union is used in residential and light commercial plumbing, irrigation, chemical transfer, and pool or spa piping where threaded Schedule 80 PVC fittings are specified. It is well suited for installations requiring future serviceability at connection points, such as pump unions, filter connections, or equipment drop legs. Licensed plumbers and pipefitters typically install this fitting in systems handling water, mild chemicals, and other fluids compatible with PVC.
Designed as an OEM-style replacement or new-installation fitting for 3/4-inch threaded Schedule 80 PVC piping systems.
Installation should be performed by a licensed plumber in accordance with applicable local plumbing codes and IPC guidelines. Depressurize and drain the system completely before removing or installing any union fitting. Use appropriate PVC-rated thread sealant tape on threaded connections and tighten by hand plus a controlled additional turn to avoid cracking the fitting body. Do not use petroleum-based solvents or lubricants on PVC fittings.
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