B K/mueller 566-040HN Galvanized Pipe Nipple 1-1/4x4 in 5pk

Product Description

The B K/Mueller Industries 566-040HN is a galvanized steel pipe nipple measuring 1-1/4 inches in diameter and 4 inches in length. Pipe nipples are short threaded fittings used to connect two female-threaded pipe sections, couplings, valves, or fittings. This nipple is zinc-galvanized for corrosion resistance, making it suitable for water supply, gas distribution, and general plumbing applications. Licensed plumbers and pipefitters install nipples as part of new construction, retrofit, and repair work on threaded iron pipe systems.

This galvanized nipple is used in residential and light commercial plumbing, HVAC hydronic systems, gas piping, and industrial pipe assemblies where 1-1/4-inch NPT threaded connections are required. It ships in a package quantity of 5, making it a practical stocking unit for service trucks and supply rooms. The 4-inch length fits standard close-quarter installations where a longer nipple is needed between fittings, valves, or tees.

Key Features

• Zinc-galvanized finish provides corrosion resistance for water and gas service
• 1-1/4-inch nominal pipe size with NPT threads on both ends
• 4-inch overall length for close-quarter and offset connections
• Sold in a package of 5 units for stocking efficiency
• Compatible with standard 1-1/4-inch threaded fittings, valves, and couplings

Compatibility

Designed as a standard NPT-threaded replacement or new-installation nipple for 1-1/4-inch iron pipe systems in plumbing, gas, and HVAC hydronic applications.

Installation Notes

Installation is performed by a licensed plumber or pipefitter per local plumbing codes and IFGC requirements where gas service is involved. Shut off water or gas supply and relieve system pressure before removing or installing any threaded fitting. Apply an approved thread sealant or PTFE tape to the male threads before assembly. Do not overtighten threaded connections; hand-tighten and finish with a pipe wrench to the appropriate number of turns for the thread size.