1-1/4 inch x 1 inch Stainless Steel Reducing Coupling Female x Female

1-1/4" x 1" Stainless Steel Threaded Reducing Coupling – Industrial Grade Performance

The 1-1/4" x 1" Stainless Steel Reducing Coupling is designed for high-performance applications requiring corrosion resistance and strength. Manufactured from austenitic stainless steel, this threaded fitting allows for a secure transition between pipe sizes in pressure-rated systems, chemical processing lines, and general-purpose fluid transport systems.

Product Highlights

• ✅ Material: Cast 304 or 316 stainless steel for excellent resistance to corrosion, oxidation, and chemical exposure
• ✅ Thread Type: Female National Pipe Thread (NPT) ends, precision-machined for leak-tight metal-to-metal sealing
• ✅ Application Versatility: Compatible with stainless steel piping and appropriate for potable water, compressed air, fuel, and industrial process lines
• ✅ Temperature & Pressure Ratings: Designed to operate under elevated pressures and temperatures in accordance with ASME B16.3/B16.11 standards

Technical Specifications

• Connection Size: 1-1/4" x 1" NPT (Female x Female)
• Material Grade: 304 or 316 Stainless Steel (ASTM A351 or equivalent)
• Working Pressure: Up to 150 psi for general plumbing, higher for specialized applications
• Standard Compliance: ANSI/ASME B1.20.1 for pipe threads, MSS-SP-114 for cast fittings

Installation Guidelines

This coupling is installed using standard thread engagement practices. Apply a compatible PTFE thread sealant or anaerobic pipe dope to the male threads prior to tightening. Over-tightening should be avoided to prevent galling, especially in stainless steel-to-stainless steel joints. Use a calibrated torque wrench if specified by the project requirements.

Applications

This fitting is used in a variety of applications including:

• Hydronic heating and chilled water systems
• Food-grade and sanitary fluid piping
• Petrochemical and fuel distribution networks
• Instrumentation and compressed air assemblies

Note:

When used in corrosive environments or in contact with dissimilar metals, appropriate measures (such as dielectric unions) should be taken to mitigate galvanic corrosion.

The 1-1/4" x 1" Stainless Steel Reducing Coupling delivers performance consistency, mechanical strength, and corrosion protection, making it a critical component in demanding mechanical and process systems.