Prier Frost-Free Quarter-Turn Outdoor Hydrant 12-Inch — Cast Brass, Anti-Siphon

The Prier P-164D12 is a 12-inch quarter-turn, frost-free outdoor hydrant with anti-siphon protection, built from heavy cast brass and engineered for long-lasting residential use.

Designed and manufactured in the United States, this outdoor sillcock combines a quarter-turn valve for fast operation, a frost-free body to reduce winter damage, and an anti-siphon feature to help prevent backflow into household water lines. The Prier P-164D12 uses heavy brass components, copper tubing and durable ACME-threaded stems that are secured at both the handle and seat, giving a quiet, rattle-free performance across a range of lengths and inlet configurations.

How does the frost-free design protect my plumbing in cold weather?

The Prier P-164D12 locates the shutoff and water passage below the frost line, so water drains from the exposed portion after shutoff to minimize freezing risk. This reduces the chance of burst valves and the need for indoor shutoff in many installations.

• 12-inch body length to place operating parts below typical frost depth
• Internal drainage path designed for quick emptying after shutoff
• Durable brass and copper materials resist corrosion from temperature cycling

What makes the anti-siphon feature important for outdoor hydrants?

The integrated anti-siphon mechanism helps prevent water from being drawn back into the potable supply if downstream pressure drops. This is an important safety feature when attachments like hoses, sprayers or fertilizer systems are connected to the outdoor faucet.

• Built-in backflow prevention reduces contamination risk to household supply
• Meets common residential expectations for safe outdoor water outlets
• Works passively without separate external backflow devices

Why are the ACME-threaded stems and dual-anchor stem design beneficial?

Prier uses heavy brass stem ends with ACME threads and secures the stem both at the handle and the seat. That construction reduces wear, prevents stem rattling under flow, and allows consistent operation across varied lengths.

• Long-wearing ACME threads for smooth quarter-turn operation
• Stem anchored at two points to eliminate vibration and noise
• Stable performance even when ordering custom lengths or larger inlet sizes

What installation options and customizations are available?

Prier offers a range of inlet options and standard lengths plus the ability to order custom lengths or plating finishes. For typical residential installs the P-164D12 covers most needs, while contractors can specify alternate inlets or lengths for special configurations.

• Twelve standard lengths available; 12-inch model commonly used for typical frost depths
• Multiple inlet choices to match existing plumbing fittings
• Optional custom lengths and finishes available on request from the manufacturer

Who is this product for? The Prier P-164D12 is intended for homeowners, landscapers and plumbing contractors who need a reliable, frost-resistant outdoor hydrant with built-in anti-siphon protection. Choose this model when you want a durable, low-noise sillcock made from heavy brass and copper materials, with flexible inlet and length options and U.S. manufacturing provenance.