3/4 inch Brass Cap

3/4" Lead-Free Brass Pipe Cap – Female Threaded, ANSI B1.20.1

The 3/4" brass pipe cap is designed to terminate the end of a male-threaded pipe in potable water, air, oil, or low-pressure gas systems. Manufactured from lead-free brass in accordance with ASTM and NSF/ANSI standards, this fitting provides corrosion resistance and a secure seal in threaded piping applications where closure is required without disassembly.

Its female National Pipe Taper (NPT) threads ensure compatibility with standard threaded pipe and fittings. The cap is suitable for both above-ground and in-wall installations and is commonly used for capping service lines, test ports, and system extensions during rough-in or maintenance phases.

Technical Specifications

• Nominal Size: 3/4" NPT (female thread)
• Material: Lead-free brass (compliant with NSF/ANSI 61 and 372)
• Connection Type: FIP (Female Iron Pipe / NPT)
• Operating Pressure: Up to 200 PSI (non-shock, water/oil/air)
• Temperature Range: -20°F to 180°F

Common Applications

• • Potable and non-potable water system terminations
• • Air compressor lines or low-pressure pneumatic systems
• • HVAC hydronic circuit test ports or isolation points
• • Plumbing rough-in closure during system staging

Installation Guidelines

Apply PTFE thread tape or approved thread sealant to the male pipe threads before tightening the cap. Use a properly sized wrench for final torque on the hex body to ensure a leak-free seal. Do not over-tighten to avoid thread damage. Install per applicable plumbing and mechanical codes.

Material Note

Lead-free brass fittings are required in all potable water systems as per U.S. Safe Drinking Water Act amendments. The alloy used in this cap provides durability, chemical resistance, and long-term performance in residential, commercial, and light industrial applications.