B K Mueller 511-404HN Galvanized Cap 0.75 Inch Pipe

Product Description

The B K Mueller 511-404HN is a 3/4-inch galvanized steel pipe cap used to close off the end of a threaded pipe run. It provides a secure, corrosion-resistant termination point in gas, water, or general plumbing distribution systems. The hot-dip galvanized finish protects against rust in both indoor and outdoor installations. Licensed plumbers and pipefitters install this cap during new construction, retrofit work, and system pressure testing. The female threaded interior engages standard NPT threads for a leak-tight mechanical seal without additional fittings.

This cap is suited for residential and light commercial plumbing applications where a 3/4-inch threaded pipe end must be sealed. Common uses include capping unused branch outlets on distribution manifolds, temporarily or permanently closing off supply lines during system modification, and terminating test points on gas or water piping. The package quantity of 15 units makes it practical for contractors managing multiple terminations on a single job or maintaining stock in a service vehicle.

Key Features

• 3/4-inch female NPT threaded interior fits standard pipe ends
• Galvanized finish provides corrosion resistance for indoor and outdoor use
• Sold in a package of 15 units for multi-point or jobsite use
• Compact cap profile allows installation in tight spaces around existing pipe runs
• Compatible with threaded pipe in gas, water, and general-purpose distribution systems

Compatibility

Designed as an OEM-style replacement fitting for 3/4-inch female NPT threaded pipe ends in standard residential and commercial plumbing or gas distribution systems.

Installation Notes

Installation is performed by a licensed plumber or pipefitter in accordance with the International Plumbing Code or International Fuel Gas Code as applicable to the system type. Shut off supply pressure and verify the line is depressurized before threading on the cap. Apply pipe thread sealant or PTFE tape to the male pipe threads before installation. Tighten with a pipe wrench to the appropriate engagement depth for the thread size — do not over-tighten and crack the cap body.