1/4 inch Brass Compression Cap

1/4 inch Brass Compression Cap – Precision Machined for Secure Sealing

The 1/4 inch brass compression cap is a vital fitting used to seal the end of a copper or plastic tubing line within compression plumbing systems. Manufactured from lead-free brass, this cap ensures corrosion resistance, mechanical strength, and long-term performance across a range of water and gas applications.

Product Advantages

• Lead-Free Brass Construction: Complies with ANSI/NSF 61 and 372 standards for potable water systems.
• Secure Compression Seal: Designed to close off compression outlets on 1/4 inch OD tubing, ideal for capping service valves or temporarily deactivating unused lines.
• No Soldering Required: Installs without heat or threading, reducing labor time and risk of installation errors.
• Reusability: Cap can be removed and reused in temporary or flexible system designs, depending on application pressure requirements.
• Temperature and Pressure Rated: Suitable for service in typical water system conditions—up to 150 psi and 180°F (non-shock).

Specifications

• Size: 1/4 inch OD
• Material: Lead-Free Brass (CW510L or equivalent)
• Connection Type: Compression (with matching compression ferrule and nut, not included)
• Certifications: ANSI/NSF 61, ANSI/NSF 372 (Low-Lead Compliance)

Installation Guidelines

This compression cap is used in conjunction with a matching compression nut and ferrule. Simply slide the nut and ferrule over the tubing, seat the cap into the ferrule, and tighten with a wrench until snug. Do not overtighten, as it may deform the tubing or fitting. No pipe dope or Teflon tape is required.

Applications

Commonly used in copper water supply lines, refrigerator/icemaker installations, appliance shutdowns, and low-pressure air or gas systems. Ideal for sealing branch outlets, temporary shutoffs, or future system extensions.

Did You Know?

Compression caps provide a mechanical seal that can outperform threaded fittings in some small-diameter tubing systems due to their ease of installation and ability to resist vibration-related loosening.

For projects requiring reliable shutoff and capping solutions in 1/4 inch tubing systems, the brass compression cap offers code-compliant safety and professional-grade performance with minimal installation effort.