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The VALUE COLLECTION 4RSB3X1 is a stainless steel reducer coupling designed for joining pipe sections of two different diameters within a pressurized piping system. It uses NPT (National Pipe Taper) threaded end connections on both ends, allowing for a secure, leak-resistant seal when properly torqued. Fabricated from stainless steel, this fitting offers strong resistance to corrosion, making it suitable for applications where moisture, chemicals, or demanding environmental conditions are present. Plumbers, pipefitters, and mechanical contractors install this type of fitting during new construction and retrofit work on commercial and industrial pipe runs.
This reducer coupling is intended for use in plumbing, HVAC, and general industrial piping systems where a transition between two pipe sizes is required. NPT threaded fittings are standard across residential and commercial installations in the United States, making this coupling broadly compatible with existing threaded pipe infrastructure. It is sold as a single unit and is suited for both shop fabrication and field installation scenarios.
Designed as a standard NPT-threaded reducer coupling for use in threaded stainless steel piping systems in plumbing, HVAC, and general industrial applications.
Installation should be performed by a licensed plumber or pipefitter in accordance with applicable local plumbing codes and ASME B1.20.1 threading standards. Shut off and depressurize the system completely before making or breaking any threaded connections. Apply an appropriate thread sealant or PTFE tape to the male NPT threads before assembly. Do not over-torque stainless steel threaded fittings, as galling of the threads can occur.
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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