1 inch Copper Cap Copper x Copper

3/4" Copper Cap – ASTM B75/B88 End Closure for Pressure and DWV Applications

The 3/4" Copper Cap is a solder joint fitting designed to terminate copper tubing in water distribution or drainage, waste, and vent (DWV) systems. Manufactured from high-purity, lead-free wrought copper per ASTM B75 Alloy C12200, this end cap delivers reliable sealing for permanent line terminations and temporary pressure testing applications.

Compliant with ASME B16.22, the cap features a cup (socket) end for sweat installation. It is designed to integrate with standard Type L or M copper tube and is suitable for both residential and commercial mechanical systems requiring pressure or gravity drainage control.

Product Features

• ✅ Code-Compliant Material – Lead-free C12200 copper ensures suitability for potable water and meets requirements under NSF/ANSI 61 and NSF 372.
• ✅ Full-Port Socket End – Designed to accommodate full pipe insertion for optimal solder adhesion and uniform sealing.
• ✅ Non-Ferrous Corrosion Resistance – Copper alloy construction withstands degradation in high-humidity and chemical environments.
• ✅ ASTM and ASME Certified – Manufactured to meet ASTM B88 and ASME B16.22 tolerances and dimensions for system compatibility.
• ✅ Versatile Function – Ideal for permanent system terminations or pressurization testing of closed-end branch lines.

Installation Guidance

Installation requires proper surface preparation including cleaning, fluxing, and torch soldering. Use only lead-free solder conforming to ASTM B813 for potable systems. Maintain appropriate joint clearances and apply uniform heat around the fitting for full capillary flow. Allow adequate cool-down before pressure testing.

Typical Applications

This copper cap is routinely specified in plumbing plans for line stubbing, system pressure test isolation, and fixture outlet protection. Common in both new construction and retrofit applications, it is used at the ends of hot and cold supply lines, branch circuits, or DWV vents requiring capping until final fixture connection or system commissioning.

Specifications

• Size: 3/4 inch nominal
• Material: Wrought Copper (ASTM B75, Alloy C12200)
• Connection Type: Socket (Solder Joint)
• Compliance: ASME B16.22, NSF/ANSI 61 & 372, Lead-Free (SDWA)

The 3/4" Copper Cap provides a high-integrity seal for copper piping systems requiring pressure containment or clean closure. Backed by standardized dimensions and code-approved material, this component is a critical addition to professional plumbing installations that demand consistent performance and longevity.