B K Mueller 566-001HN Galvanized Close Nipple 1-1/4 in

Product Description

The B K Mueller Industries 566-001HN is a close-pattern galvanized steel nipple in a 1-1/4 inch pipe size. A close nipple is threaded end-to-end with no unthreaded center section, making it the shortest possible nipple configuration for a given pipe size. It is used to join two female-threaded fittings or valves with minimal gap between them. This fitting ships in a package quantity of 5 and weighs approximately 1.05 pounds per package. Plumbers and pipefitters install these in water supply, gas distribution, and general-purpose piping systems where space is tight and a near-flush connection is required.

Close nipples in 1-1/4 inch galvanized steel are a standard stocking item in residential and light commercial plumbing. Typical applications include branch connections on water mains, boiler piping, fire suppression systems, and industrial process lines where a zinc-coated fitting is specified for corrosion resistance. The galvanized finish provides a protective layer suited for wet or mildly corrosive environments.

Key Features

• Close pattern — threaded end-to-end for minimum installed length
• 1-1/4 inch nominal pipe size with standard NPT threads
• Galvanized steel construction for corrosion resistance in wet service
• Sold in a package of 5 units
• Suitable for water supply, gas, and general-purpose piping applications

Compatibility

Designed as an OEM-style replacement or standard stock fitting compatible with 1-1/4 inch NPT female-threaded pipe fittings, valves, and couplings in galvanized or black iron piping systems.

Installation Notes

Installation is performed by licensed plumbers or pipefitters following applicable IPC and IFGC code requirements. Always shut off the water or gas supply and depressurize the line before removing or installing nipples. Apply an approved pipe thread sealant or PTFE tape to the male threads before assembly. Because close nipples have no unthreaded center, a strap wrench is typically required to avoid damaging the threads during tightening.