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Chrome-plated brass anti-siphon frost-proof sillcock with aluminum handwheel handle

Zoro Select

Zoro Select bath faucet part

SKU CH-ZMW8-RJSGC

Anti-siphon frost-proof sillcock with solder cup or MNPT inlet, chrome-plated brass body, aluminum handwheel handle, and 125 psi maximum pressure rating

  • TypePipes, Valves & Fittings
  • Anti-siphon design prevents backflow contamination
  • Frost-proof construction protects against freeze damage
  • Chrome-plated brass body resists corrosion
  • Meets ASSE 1019 and ANSI standards
  • Aluminum handwheel handle for reliable operation

Anti-siphon sillcock for outdoor supply

The Zoro Select 104-511 is a frost-proof sillcock designed to protect exterior water lines from freezing and backflow. It connects to a 1/2 in solder cup or male NPT inlet and meets ASSE 1019 anti-siphon requirements. The chrome-plated brass body and aluminum handwheel handle suit residential and light commercial plumbing installations.

Pressure rating and material limits

The valve body is rated for a maximum working pressure of 125 psi under normal use. Chrome-plated brass construction resists corrosion from water exposure and seasonal temperature swings. The aluminum handwheel operates the stem without requiring excessive torque, and the design complies with ASME A112.18.1/CSA B125.1 and ANSI B1.20.1 standards for reliable shut-off.

Compliance and installation notes

The product carries California Proposition 65 warnings for chemicals known to cause cancer and reproductive harm, which may affect specification in regulated projects. It conforms to ANSI B16.18 and ANSI B1.20.7 for dimensional and threading consistency. No additional accessories or software are bundled; the sillcock is supplied as a complete valve assembly ready for direct piping connection.

Highlights

  • Anti-siphon design prevents backflow contamination
  • Frost-proof construction protects against freeze damage
  • Chrome-plated brass body resists corrosion
  • Meets ASSE 1019 and ANSI standards
  • Aluminum handwheel handle for reliable operation

Specifications

BrandZORO SELECT
TypePipes, Valves & Fittings

Questions about this item

How do I install the 104-511 sillcock with its solder cup or MNPT inlet?

Clean the 1/2 in copper pipe or male threads, apply flux or tape, then solder or thread the inlet; the step often missed is orienting the body so the anti-siphon vent faces downward for proper drainage.

What maintenance will the chrome plated brass body and aluminum handwheel need over time?

Inspect the anti-siphon vent annually for debris, lubricate the handwheel threads with silicone grease, and replace the internal seat washer if dripping appears at the spout.

At what pressure will the 125 psi rated valve show its limit during sustained use?

Continuous operation near 125 psi can accelerate seat wear and may cause the anti-siphon mechanism to chatter, so keep working pressure comfortably below that rating.

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