Boltigen 12" Frost-Free Anti-Siphon Sillcock — Lead-Free Brass Outdoor Faucet, 1/2" NPT Inlet & 3/4" GHT

The Boltigen 12-inch anti-siphon frost-free sillcock is a lead-free brass outdoor faucet designed to prevent freezing and backflow while providing a secure 1/2" NPT inlet and a 3/4" GHT hose connection.

This frost-proof sillcock from Boltigen combines a long stem design with an anti-siphon feature so the water in your supply line stays protected from winter freeze and potential cross-contamination. Built from chrome-plated, lead-free brass, the valve is intended for potable water use, easy threaded installation, and routine yard or utility connections where reliable winter performance matters.

How does this sillcock prevent frozen pipes?

The 12" stem places the shutoff point well inside the heated interior wall, so standing water is drained back from the exposed outdoor spout and less likely to freeze. The frost-free design relies on gravity and internal slope rather than insulation alone, reducing the risk of burst pipes in cold weather.

• 12-inch stem positions shutoff inside heated space
• Internal slope allows water to drain away from exterior spout
• Durable brass body handles repeated outdoor temperature cycles

What does the anti-siphon feature do for my water system?

The built-in anti-siphon mechanism prevents contaminated water from being drawn back into your main supply during pressure changes. This backflow protection reduces the risk of cross-contamination when hoses or attachments are connected, making it safer for irrigation and potable water uses.

• Anti-siphon valve prevents backflow into the supply line
• Helps meet common cross-connection safety expectations
• Works passively—no external vent or additional parts required

Is this easy to install and compatible with my setup?

The Boltigen sillcock uses a 1/2" NPT male inlet for threaded pipe connections and a 3/4" GHT hose thread on the outlet, matching typical residential plumbing and garden hose fittings. Threaded installation keeps setups straightforward and leak-resistant when properly sealed with tape or thread compound.

• 1/2" NPT inlet threads onto standard half-inch pipe
• 3/4" GHT outlet fits standard garden hoses and connectors
• Chrome-plated finish for easier cleaning and corrosion resistance

What materials and durability can I expect?

Constructed from lead-free brass with a chrome-plated surface, the sillcock resists corrosion and maintains potable-water safety. The solid brass stem and valve components are chosen for long service life in outdoor conditions and repeated use with hoses and fittings.

• Lead-free brass body safe for drinking water
• Chrome plating for extra surface protection and appearance
• Robust valve components designed for outdoor exposure

Who this product is for: The Boltigen 12" anti-siphon frost-free sillcock is ideal for homeowners, contractors, and property managers who need a dependable outdoor faucet that resists freezing and prevents backflow. Choose this valve when replacing an old sillcock, specifying frost-proof fittings for new construction, or upgrading a hose bib to a lead-free, code-friendly option for year-round outdoor water access.