1/2" x 3/8" Full-Port Straight Stop Valve, Brass, Leadfree ProPEX

Uponor ProPEX Full-Port Straight Stop Valve – Engineered for Maximum Flow and Long-Term Reliability

The Uponor ProPEX Full-Port Straight Stop Valve is a high-performance shut-off solution for PEX plumbing systems, offering unrestricted flow and durable, lead-free brass construction. Designed to meet the needs of professional installers, this valve provides consistent shutoff control while minimizing pressure loss in potable water applications.

Ideal for point-of-use installations such as lavatories and kitchen sinks, it connects 1/2" PEX to 3/8" OD compression fixtures. Its robust quarter-turn mechanism allows for quick, secure shut-off and long service life in residential and commercial environments alike.

Why It Delivers for the Pros

• Full-Port Design – Enables maximum water flow with minimal restriction, optimizing system performance.
• Quarter-Turn Control – Precision-engineered ball valve mechanism provides smooth, fast shut-off with a 90° turn.
• Lead-Free Brass Body – Certified for potable water use and built for corrosion resistance and strength.
• ProPEX Connection – Designed specifically for use with Uponor PEX and ProPEX expansion fittings for permanent, secure installation.
• Code Compliant – Meets applicable ASME, NSF, and IPC standards for plumbing system compatibility.

Specifications

• Inlet: 1/2" PEX (ProPEX connection only)
• Outlet: 3/8" OD Compression
• Material: Lead-free brass
• Operation: 1/4-turn handle
• Warranty: 5 years (manufacturer)

Installation Guidance

This valve is designed for use exclusively with the Uponor ProPEX system and requires the proper PEX expansion tool for installation. A professional installer should ensure correct expansion and fitting engagement for a leak-free seal. No torching, gluing, or crimping is required. Compatible only with PEX-a tubing.

Contractor Notes

On-Site Efficiency: This valve’s full-port configuration reduces bottlenecks at fixture shutoffs, improving downstream performance—particularly important in multi-fixture or low-pressure zones. Its compact footprint allows easy placement even in confined cabinet installations.

Long-Term Reliability: With no internal seats to degrade over time and a corrosion-resistant body, this valve offers confidence in both new installs and retrofits. The intuitive handle design also provides positive user control in residential applications.

Key Advantages

• Flow-Through Efficiency – Avoids reduced fixture performance common with standard reduced-port valves.
• Secure ProPEX Connection – Delivers permanent, high-integrity joints with no solder or solvent cement required.
• Maintenance-Free Design – Once installed, the valve requires no ongoing service or adjustment.
• NSF/ANSI 61 & 372 Certified – Complies with all safety standards for use in potable water systems.

Trusted by Professionals Nationwide

The Uponor ProPEX Full-Port Straight Stop Valve is a precision solution for installers who demand optimal flow, durability, and easy integration with PEX systems. Choose a valve that works as hard as you do—engineered for performance, built to last.