Merit Brass 4548-550 Stainless Steel Pipe Nipple 3 in Sch 80

Product Description

The MERIT BRASS 4548-550 is a seamless stainless steel pipe nipple sized for 3-inch pipe, manufactured to Schedule 80 wall thickness in Grade 304/304L dual-certified material. Schedule 80 provides greater wall thickness and pressure capacity compared to standard Schedule 40, making this nipple suitable for demanding fluid and gas piping applications. The 304/304L dual certification means the material meets both standard and low-carbon specifications, reducing the risk of sensitization in welded or high-temperature service. This nipple is a threaded close or short fitting used by licensed plumbers and pipefitters to join pipe runs, connect valves, and make up stainless assemblies in commercial and industrial systems. At 3.669 pounds, the part has the mass expected of a heavy-wall 3-inch stainless fitting.

The 4548-550 is appropriate for commercial plumbing, process piping, food service, chemical handling, and industrial mechanical systems where stainless steel is specified for corrosion resistance. Schedule 80 stainless nipples are commonly installed in high-pressure water service, steam distribution, and corrosive fluid transfer lines. Plumbers and pipefitters working on institutional, industrial, or marine installations will find this nipple a direct fit where a 3-inch threaded stainless connection is required. The seamless construction eliminates a weld seam, which is preferred in pressure-rated and sanitary piping assemblies.

Key Features

• Seamless construction — no longitudinal weld seam for consistent wall integrity
• Schedule 80 wall thickness for higher pressure ratings versus Schedule 40
• Grade 304/304L dual-certified stainless steel for broad corrosion resistance
• 3-inch pipe size with matching 3-inch thread size
• Suitable for use in food service, chemical, and industrial piping systems

Compatibility

Designed as an OEM-style threaded fitting for 3-inch Schedule 80 stainless steel piping systems using NPT connections in commercial and industrial plumbing and process piping applications.

Installation Notes

Installation is performed by a licensed plumber or pipefitter. Shut off and depressurize the system completely before removing or installing any threaded fitting. Apply an appropriate thread sealant or PTFE tape rated for the service fluid and temperature before making up the connection. Torque to the fitting manufacturer's recommended specification for 3-inch NPT threads and verify for leaks before returning the system to service.