VEVOR 12" Anti-Siphon Frost-Proof Sillcock Outdoor Faucet - 1/2" Push-to-Fit Inlet, 3/4" Hose Bibb, Backflow Preventer

This frost-free sillcock is built for exterior walls where freezing conditions can damage ordinary faucets. It combines a 12-inch in-wall length, a 1/2" push-to-fit inlet, and a 3/4" hose bibb so you can install quickly without soldering; the integrated anti-siphon/backflow feature helps protect your potable water lines from unwanted reverse flow. Constructed with chrome-plated brass and lead-free components, the unit is intended for general outdoor tasks like irrigation, car washing, and livestock watering.

How does the anti-siphon feature protect my plumbing?

The anti-siphon valve prevents water from being drawn back into your home's supply if the downstream pressure drops, reducing contamination risk. It does this automatically when downstream pressure falls, creating a physical air gap to block backflow. This is especially helpful when a hose is left submerged in buckets, tanks, or chemical sprayers.

• Built-in backflow prevention valve that activates on pressure loss
• Creates a safe air gap to stop reverse flow into potable lines
• Reduces need for separate backflow devices in many outdoor setups

What makes this sillcock freeze-resistant and suitable for in-wall installation?

The 12" stem places the valve farther inside the wall cavity where interior heat helps prevent freezing at the shutoff point. With a frost-proof design, the shutoff sits away from the exposed exterior and drains toward the interior when closed. Materials and a secure wall-mounted installation minimize the chance of ice forming at the working valve.

• 12-inch stem for deeper in-wall valve placement
• Design allows internal drainage away from exterior exposure
• Chrome-plated brass components resist corrosion and cracking in cold weather

How easy is installation with the 1/2" push-to-fit connector?

The 1/2" push-to-connect inlet accepts PEX, CPVC, or copper without soldering, clamps, or glue, speeding up installation for DIYers and pros. Simply cut the pipe square, ensure it’s clean, and push the pipe into the fitting until it seats fully. The integrated 3/4" NH hose bibb provides a standard outlet for garden hoses and accessories.

• Push-to-fit inlet saves time and tools during hookup
• Compatible with PEX, CPVC, and copper piping systems
• 3/4" National Hose (NH) bibb for common garden hose connections

What materials and standards does this sillcock meet?

VEVOR engineered this sillcock with chrome-plated brass and brass connectors, plus a heavy-duty cast iron handle to resist outdoor wear. The fittings are lead-free and meet NSF/ANSI 372-2016 criteria for lead content in potable water system components. Those material choices extend longevity while minimizing corrosion and leakage.

• Chrome-plated brass body and connectors for durability
• Lead-free construction compliant with NSF/ANSI 372-2016
• Cast iron handwheel for reliable manual control

Who is this for? Installers, homeowners, small-farm operators, and property managers who need a durable, easy-to-install outdoor faucet with built-in backflow protection will find this sillcock practical. It’s ideal where a frost-resistant splice to PEX/CPVC/copper is required, and for anyone wanting to reduce winter freeze risk without complex plumbing work. Note: while the anti-siphon feature improves safety, the product is not marketed as a drinking-water treatment device; follow local plumbing codes for potable installations.