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The BK 404-120 is a Schedule 80 PVC threaded nipple designed for the transport of water and other liquids in plumbing and industrial piping systems. Measuring 0.75 inches in diameter by 12 inches in length, this nipple is manufactured to IPS (iron pipe size) standards and threaded to NPT (National Pipe Thread) specifications. It meets ASTM D1785 requirements, confirming dimensional and material compliance for Schedule 80 PVC pipe fittings. The heavier wall thickness of Schedule 80 construction provides greater pressure tolerance compared to Schedule 40. Plumbers and pipefitters install these nipples as short pipe extensions or connectors between fittings in both above-ground and in-wall applications.
This nipple is suited for residential and light commercial plumbing systems, irrigation lines, chemical handling setups, and industrial fluid transport where PVC is an approved material. Because Schedule 80 PVC offers a thicker wall profile, it is commonly specified in applications requiring added mechanical strength or moderate pressure ratings. Pipe thread compound or sealing tape must be applied to the threaded portion prior to assembly to ensure a leak-free joint.
Designed as an OEM-style replacement and standard-fit nipple for Schedule 80 PVC piping systems using 0.75 inch NPT threaded fittings and valves.
Installation is performed by licensed plumbers or qualified pipefitters. Always shut off the water supply and depressurize the line before disassembling existing connections. Apply pipe thread sealant compound or PTFE tape to the male threads before making up the joint — do not over-tighten PVC threaded connections, as PVC is susceptible to thread cracking under excessive torque. Verify that the fluid being transported is chemically compatible with PVC before installation.
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