2 inch Copper Cap

2 Inch Copper Cap – Solder End, Lead-Free Copper Fitting for Sealing Copper Tube Systems

The 2 inch copper cap is a solder (sweat) fitting used to terminate or seal the end of copper tubing in water distribution or hydronic piping systems. It is manufactured from lead-free wrought copper and conforms to applicable ASTM and ANSI standards for use in potable and non-potable applications. This cap is designed for permanent sealing when soldered with approved materials and methods.

Material and Standards Compliance

Constructed from lead-free copper alloy, this fitting complies with NSF/ANSI 61 and 372 for use in drinking water systems. The cap is suitable for use with Type K, L, or M hard or soft copper tubing and meets the requirements of ASME B16.22 and ASTM B75 or B88 (depending on manufacturer specifications). Key characteristics include:

• ✅ Material: Lead-free wrought copper
• ✅ Connection: Cup (solder) end, sized to accept nominal 2-inch copper tube
• ✅ Temperature Rating: Suitable for service temperatures up to 400°F (204°C) with soldered joints
• ✅ Pressure Rating: 200–300 psi when properly installed (dependent on tube type and soldering technique)

Installation Requirements

Prepare the tubing and fitting by cleaning and fluxing both mating surfaces. Use lead-free solder and a torch in accordance with ASTM B828. Proper heating and full solder penetration are essential for a pressure-tight joint. Cooling should occur naturally—do not quench with water. Pressure test the assembly after installation to verify system integrity.

Typical Applications

This copper cap is typically installed at the termination point of copper water supply or hydronic piping runs. Common uses include system pressure testing, capping unused lines, or isolating sections during renovations or rerouting. It is also used in DWV systems as a temporary or permanent seal during maintenance procedures.

Code Compliance Note

Use of lead-free fittings in potable water systems is mandated under the Safe Drinking Water Act and enforced through local plumbing codes nationwide. This copper cap is suitable for use in both residential and commercial installations where compliance with NSF/ANSI 61 and 372 is required.

Technical Specifications

• Size: 2 inch nominal
• Connection Type: Solder (sweat) cap
• Material: Lead-free copper (ASTM B75 or B88)
• Standards: ASME B16.22, NSF/ANSI 61, NSF/ANSI 372