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Small copper pipe cap with smooth cup end

Nibco, Inc.

Nibco, Inc. 617 1/8 in Wrot Copper Cap Cup

SKU CH-M3H8-ZTXZY

A wrot copper cap with cup connection for 1/8 in copper tube, rated to 729 psi at 200°F and compliant with ASME B16.22 and NSF/ANSI 61

  • Copper construction resists dezincification for lasting potable-water reliability
  • ASME B16.22 and ASTM B75 compliance ensures code-approved installations
  • 729 psi rating at 200 °F supports high-pressure heating systems
  • NSF/ANSI 61 and 372 certifications confirm safe drinking-water contact
  • Cup connection fits 1/8 in copper tube with 1/4 in outer diameter

1/8 in Wrot Copper Cap

The NIBCO 617 cap fits 1/8 inch copper tube size with a 1/4 inch outer diameter cup connection. It is manufactured from C12200 grade wrot copper and rated for potable water and air applications. The fitting meets ASME B16.22, ASTM B75, MSS SP-104, NFPA 99, NSF/ANSI 61, NSF/ANSI 372 and UL 207 standards. It is dezincification-resistant for long service life.

Sustained pressure and temperature performance

The cap withstands a maximum operating pressure of 729 psi at 200 degrees F and a maximum operating temperature of 400 degrees F. The minimum operating temperature is 20 degrees F. These ratings apply to continuous service conditions rather than short-term test values. The material grade and dezincification resistance maintain joint integrity under prolonged thermal cycling and pressure loads.

Replaces worn or missing caps on 1/8 in copper lines

This fitting upgrades or repairs existing 1/8 inch copper tube installations where a cup-style cap is required. The jump is worth it when the system demands compliance with NSF/ANSI 61 and 372 for potable water safety or NFPA 99 for medical gas piping. It is not suited for tube sizes other than 1/8 inch or for applications requiring threaded or press-connect ends.

Highlights

  • Copper construction resists dezincification for lasting potable-water reliability
  • ASME B16.22 and ASTM B75 compliance ensures code-approved installations
  • 729 psi rating at 200 °F supports high-pressure heating systems
  • NSF/ANSI 61 and 372 certifications confirm safe drinking-water contact
  • Cup connection fits 1/8 in copper tube with 1/4 in outer diameter

Specifications

BrandNIBCO

Questions about this item

Does the 1/8 in Wrot Copper Cap generate noise, heat, or draw power during continuous operation?

No, this is a passive copper fitting with no moving parts, electronics, or power requirement, so it produces no noise, heat, or power draw.

What existing piping must I already have for the 1/8 in cup fitting to connect properly?

You need copper tubing with a 1/4 in outer diameter that matches the 1/8 in copper tube size for a sweat-solder cup joint.

Will the C12200 copper cap resist dezincification when joined to older copper pipe in a potable water system?

Yes, the C12200 grade is dezincification-resistant and meets NSF/ANSI 61 and NSF/ANSI 372 for potable water use with existing copper piping.

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