B K Mueller 511-203HN 1/2 in Galvanized Coupling with Stop

Product Description

The B K Mueller Industries 511-203HN is a 1/2 inch galvanized pipe coupling with an integrated stop, designed for use in threaded pipe assemblies across residential and light commercial plumbing systems. The internal stop prevents over-insertion of pipe ends, ensuring consistent make-up depth and a reliable, leak-resistant joint. Galvanized steel construction provides corrosion resistance suitable for water supply lines, gas piping where permitted, and general mechanical piping applications. This fitting is typically installed by licensed plumbers and pipefitters working on threaded iron or steel pipe systems.

This coupling is suited for joining two sections of 1/2 inch threaded pipe in residential water supply, irrigation, and light commercial plumbing applications. The stop feature makes it especially practical in close-quarters installations where confirming full pipe engagement by feel or inspection is difficult. Sold in a package quantity of 25 units, this SKU is appropriate for contractors stocking fittings for multi-fixture or multi-drop installations.

Key Features

• Integrated internal stop ensures consistent pipe make-up depth on both ends
• Galvanized steel construction resists corrosion in water supply and mechanical piping environments
• 1/2 inch nominal pipe size fits standard NPT threaded pipe and fittings
• Sold in a 25-unit package, reducing per-unit cost for volume installations
• Threaded end connections compatible with standard NPT iron pipe systems

Compatibility

Designed as an OEM-style replacement and standard-stock fitting for 1/2 inch NPT threaded galvanized steel pipe systems in residential and light commercial plumbing and mechanical applications.

Installation Notes

Installation should be performed by a licensed plumber in accordance with the International Plumbing Code (IPC) and applicable local codes. Shut off and depressurize the supply line before disassembly or fitting installation. Apply thread sealant tape or pipe compound to male threads before assembly and tighten to hand-tight plus wrench-tight using a pipe wrench. Do not over-torque, as this can crack galvanized fittings or damage threads.