Oetiker 10500343-100 1-ear Clamp 1-1/4 Inch Carbon Steel

Product Description

The OETIKER 10500343-100 is a single-ear stepless clamp designed for secure, permanent hose and tubing connections in plumbing, HVAC, and fluid-transfer applications. The clamp is formed from carbon steel with a zinc-plated head coating for corrosion resistance. It features a 7 mm band width, 0.75 mm band thickness, and a clamping range of 28.50 mm to 31.60 mm, covering nominal 1-1/4 inch tubing. Installation requires a dedicated ear-clamp pincer tool that cold-forms the ear closed without the use of fasteners, producing a vibration-resistant, tamper-evident connection that meets the demands of professional plumbing and hydronic work.

This clamp is suited for residential and light commercial applications where a permanent, leak-free connection is required on flexible hose, PEX tubing, corrugated stainless steel tubing fittings, and similar assemblies. Licensed plumbers and HVAC technicians commonly use 1-ear clamps when installing radiant heating loops, potable water distribution systems, and refrigerant-side flexible connectors. The zinc-plated finish provides a base level of environmental resistance appropriate for indoor mechanical rooms and concealed-space installations.

Key Features

• Single-ear stepless design creates a permanent, vibration-resistant connection without fasteners
• Carbon steel construction with zinc-plated head coating for corrosion resistance
• 7 mm band width provides even clamping pressure around the hose circumference
• 0.75 mm band thickness balances flexibility during installation with holding strength after closing
• Clamping range of 28.50 mm to 31.60 mm suits nominal 1-1/4 inch tubing
• Cold-formed closure leaves a tamper-evident ear that is easy to inspect visually

Compatibility

Designed as an OEM-style stepless ear clamp for nominal 1-1/4 inch flexible hose and tubing connections in plumbing and HVAC assemblies.

Installation Notes

Installation requires a dedicated ear-clamp pincer or stepless clamp tool rated for the ear geometry — standard slip-joint pliers are not acceptable substitutes. Shut off and depressurize the relevant fluid or refrigerant circuit before removing any existing clamp or fitting. Follow applicable IPC, IFGC, or local mechanical code requirements for the connection type being made. Verify the tubing is fully seated on the fitting barb before closing the ear to ensure a leak-free joint.