1-1/4 inch Copper Cap Copper x Copper

1-1/4" Copper Cap – Sweat Connection for Secure System Termination

The 1-1/4" Copper Cap is a high-integrity component engineered for sealing off copper tubing in hydronic, potable water, and mechanical piping systems. Designed to terminate the end of a copper line with a clean, durable closure, this cap is ideal for both new construction and retrofit applications requiring precision and compliance.

Constructed from high-grade, lead-free wrought copper, this fitting meets ASTM B75 and ANSI/NSF 61-G standards for performance in residential, commercial, and institutional environments. The cup (socket) end is manufactured to ANSI/ASME B16.22 specifications, ensuring a consistent and reliable sweat (solder) connection when installed with properly prepared tubing and approved joining materials.

Features and Benefits

• ✅ Lead-Free Composition: Compliant with Safe Drinking Water Act and NSF 61-G for potable water applications.
• ✅ Wrought Copper Construction: Offers superior corrosion resistance and long service life in water supply and HVAC systems.
• ✅ Socket-Type Sweat Connection: Engineered for uniform solder fill and secure sealing during thermal joining.
• ✅ Dimensional Accuracy: Precision-manufactured to maintain alignment and sealing integrity under pressure.
• ✅ Versatile Use: Suitable for both horizontal and vertical lines in copper tube systems.

Common Applications

The 1-1/4" copper cap is widely used in:

• Potable water system terminations
• HVAC piping system shutdowns or unused branch caps
• Drainage system ends or temporary test caps

Technical Specifications

• Nominal Size: 1-1/4 inch
• Material: Wrought Copper (ASTM B75/B88)
• End Connection: Female Socket (sweat/solder type)
• Standards: ASME B16.22, NSF 61-G, Lead-Free Certified
• Operating Pressure: Suitable for up to 200 PSI in water systems (with proper installation)

Installation Notes

This cap should be installed using standard soft soldering techniques. Clean and deburr both the cap socket and copper tubing before applying flux and heat. Use lead-free solder approved for potable water. Allow the joint to cool naturally after soldering and test for leaks at operating pressure.

Regulatory Compliance

Lead-free copper fittings such as this are mandated by plumbing codes across all 50 U.S. states for use in drinking water systems. This ensures health safety and simplifies code inspections and project sign-offs.

Professionals choose the 1-1/4" Copper Cap for reliable system shutdowns and permanent line terminations. Engineered for tight tolerances and maximum durability, this fitting supports long-term performance under demanding jobsite conditions. Specify quality—choose components that meet the standard every time.