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Close-up of stainless steel Oetiker one-ear crimp clamp model 425R (1-1/4in), showing ear closure, smooth band, and mechanical interlock.

1-1/4 in Stainless Steel Oetiker 425R One-Ear Crimp Clamp

Brand: Oetiker
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$0.84
$0.63
SKU 425R

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Reliable stainless steel one-ear crimp clamp designed for secure, low-profile connections on 1-1/4 in nominal hose and poly pipe. The 425R (Oetiker 15500027) delivers a visible mechanical interlock with burr-free edges and a compact ear closure for long-term corrosion resistance in irrigation, agricultural, and general fluid-handling applications.

  • Material: Stainless steel (UNS S30400 / 1.4301) for corrosion resistance in outdoor and moist environments.
  • Nominal size: 1-1/4 in (designed for standard 1.25" poly pipe/hose).
  • Band & profile: 7.0 mm band width, 0.6 mm band thickness for consistent sealing force and low profile.
  • Clamping type: Single-ear crimp with mechanical interlock; dimpled ear provides increased clamping force and visible deformation to confirm closure.
  • Typical open/closed diameters: Approx. open 1.675 in, closed 1.55 in — suitable for standard nominal 1-1/4 in fittings (verify against your tubing dimensions).
  • Applications: Irrigation, drip systems, agricultural tubing, poly pipe assemblies, and general low- to moderate-pressure hose connections.

Install with an Oetiker-compatible pincer or force-monitored crimp tool and verify ear deformation visually. These clamps form a permanent, tamper-resistant seal; they are ideal where a compact, 360-degree seal is needed. Not recommended for systems rated above 100 PSI—use a worm-gear or screw-type clamp for higher-pressure applications.

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Frequently Asked Questions

What pipe sizes does the 425R clamp fit?
Fits nominal 1-1/4 in pipe/hose; approximate open diameter 1.675 in and closed diameter 1.55 in. Check your tubing dimensions before installing.
How do I install the Oetiker one-ear crimp clamp?
Slide clamp onto tubing, seat over the fitting, then crimp the ear with an Oetiker pincer or force-monitored crimp tool until the ear shows visible deformation.
Is this clamp suitable for pressurized irrigation systems?
Yes for typical irrigation and low- to moderate-pressure systems. Not recommended for systems above 100 PSI—use a worm-gear clamp for higher pressure.

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