1/2" Cast Brass Boiler Drain Valve, Lead-Free, Male (or Copper) to Hose

Professional-Grade Performance – LEGEND 107-143NL 1/2" Lead-Free Boiler Drain Valve

Engineered for system maintenance and drainage, the LEGEND Model 107-143NL Boiler Drain Valve is a dependable solution for hot water boiler systems, water heaters, and general-purpose service drain lines. Constructed from cast lead-free brass, this 1/2" MIP x 3/4" hose thread valve is designed to withstand daily jobsite demands while maintaining compliance with low-lead legislation.

The LEGEND 107-143NL features a durable full-pattern body, precision-machined components, and a secure rubber seat washer—all contributing to its longevity and leak-free reliability. It’s the go-to choice for professionals who value long-term performance and installation efficiency.

Why Professionals Rely on the 107-143NL

• Lead-Free Cast Brass Body – Compliant with federal and state low-lead regulations, safe for potable water systems.
• Full-Port Design – Delivers unrestricted flow for quick draining and better flushing performance in boiler applications.
• Robust Stem and Bonnet Assembly – Includes a precision-packed stem with a packing nut for secure operation over time.
• Standard Hose Thread Outlet – 3/4" GHT outlet easily connects to hoses or hose-thread vacuum breakers for versatile utility connections.
• Buna-N Seat Washer – Offers a consistent seal, minimizing the risk of leaks even under frequent use.

Specifications at a Glance

• Model: LEGEND 107-143NL
• Size: 1/2" MIP inlet x 3/4" male hose thread outlet
• Material: Cast lead-free brass (No-Lead alloy)
• Seat Material: Buna-N rubber washer
• Pressure Rating: 125 PSI WOG
• Temperature Range: Standard service for residential hot water systems
• Origin: Domestic manufacture
• Certifications: Compliant with NSF/ANSI 372 and the Safe Drinking Water Act

Installation Insight

The LEGEND 107-143NL is ready for threaded installation into any compatible MIP outlet. Its hose-thread discharge port allows for fast water evacuation or attachment to testing and flushing equipment. For best results, apply thread sealant and tighten to manufacturer torque recommendations. Professional installation is advised to ensure a code-compliant, leak-free fit—especially in pressurized or heated systems.

What Contractors Should Know

This boiler drain valve is a staple in service trucks and mechanical rooms for a reason. It delivers a dependable shut-off and drain solution without cutting corners on material or manufacturing quality. With LEGEND’s reputation and commitment to U.S.-based production, you can trust this valve to perform where lesser components may fail.

Protect Your System with Confidence

When maintaining or upgrading hydronic systems, choosing quality components like the LEGEND 107-143NL means fewer callbacks and more reliable system performance. Install it with confidence and keep your drainage points as dependable as the rest of your install.