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Brass boiler drain valve with half-inch S521P connection

Legend Valve

Legend Valve 107-159NL 1/2 S521P No Lead Boiler Drain Valve

SKU CH-6SDW-68GE8

No-lead brass boiler drain valve with 1/2-inch S521P connection for safe water discharge

  • No-lead brass construction meets safety regulations
  • 1/2 inch S521P connection fits standard boiler drains
  • Durable brass body resists corrosion in heating systems
  • California Proposition 65 warning indicates chemical compliance
  • New condition ensures reliable performance from installation

Boiler Drain Valve for Water Systems

The Legend Valve 107-159NL is a 1/2 S521P boiler drain valve designed for residential and commercial plumbing installations. It provides a reliable shut-off point for draining boilers, water heaters and piping systems. The no-lead brass construction meets current safe drinking water requirements for potable applications. Installers and maintenance technicians will find it suited to standard hydronic and domestic water lines.

No-Lead Brass Build with Standard Threads

The valve body uses no-lead brass that resists dezincification and complies with low-lead regulations for potable water. Its 1/2 inch connection threads directly onto common boiler taps and pipe fittings without adapters. The quarter-turn handle operates smoothly even after seasonal periods of inactivity. Brass components withstand typical system pressures and temperatures encountered in heating and plumbing service.

Replaces Worn or Non-Compliant Drain Valves

This unit replaces older boiler drains that leak, seize or contain leaded brass no longer permitted in new installations. The jump is worthwhile when a valve fails to seal, shows corrosion at the seat or must be swapped to satisfy inspection codes. It is not suited for high-pressure steam lines, gas service or applications requiring a full-port ball valve flow coefficient.

Highlights

  • No-lead brass construction meets safety regulations
  • 1/2 inch S521P connection fits standard boiler drains
  • Durable brass body resists corrosion in heating systems
  • California Proposition 65 warning indicates chemical compliance
  • New condition ensures reliable performance from installation

Specifications

BrandLEGEND VALVE

Questions about this item

What connection standard does the 107-159NL boiler drain valve use?

The valve uses a 1/2 inch S521P thread pattern for direct connection to boiler piping.

What pipe size and thread type are required to mount this valve?

It requires a 1/2 inch female NPT fitting to accept the male S521P threads on the valve body.

How is the no-lead brass valve installed and which step is often missed?

Apply thread sealant to the male threads, tighten into the boiler tapping, then open the handle to verify flow; the step often missed is confirming the drain outlet points downward for complete drainage.

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