Prier frost-free outdoor hydrant 16-Inch quarter-turn anti-siphon — brass construction, freeze-protect

Built from heavy cast brass and copper tubing with stainless and aluminum components, this sillcock is engineered to resist corrosion, minimize noise, and provide reliable water control from inside the heated portion of a structure. Its dual-anchored ACME-threaded stem and quarter-turn operation make it easy to use while reducing wear. The integrated anti-siphon feature prevents backflow into the potable supply, and the 16-inch length accommodates wall thicknesses and freeze-protection setups where the valve seat remains inside the heated area.

How does the Prier P-164D16 prevent freezing and protect plumbing?

This frost-free design locates the valve seat inside the building so water drains away from the exterior port after shutoff, reducing freeze risk in cold weather. The long, solid stem construction maintains a secure seat even at extended lengths.

• 16-inch length positions the shutoff point inside heated space
• Drain-back design minimizes trapped water in the spout
• Heavy brass and copper materials resist corrosion and cracking

What makes this hydrant durable and quiet during use?

Prier uses heavy cast brass patterns and copper tubing with stainless and aluminum accessories for structural strength and longevity. The stem is secured at both the handle and seat with ACME threads, reducing play that can cause rattling or noise under flow.

• Dual-secured stem to prevent wobble and wear
• ACME-threaded stem ends for long-lasting mechanical engagement
• Robust metal components designed for decades of residential service

How does the anti-siphon feature work and why is it important?

The built-in vacuum breaker acts as an anti-siphon device to prevent contaminated water from being drawn back into the household supply. This safeguards potable water when hoses or attachments are connected to the exterior spigot.

• Integrated vacuum breaker prevents backflow contamination
• Meets common anti-siphon requirements for outdoor fixtures
• Reduces need for separate backflow-prevention accessories

What connection and installation options does this model offer?

The P-164D16 ships with a 1/2" MIP x 1/2" sweat connection and suits typical residential piping. Prier produces multiple inlet choices and lengths for custom plumbing configurations, and their stem design supports manufacturing at varied lengths without seating issues.

• Standard 1/2" MIP x 1/2" SWT connection for common installations
• Available in multiple lengths and inlet styles for flexibility
• Designed to connect within the heated portion of the wall to reduce freeze risk

Who is this for? The Prier P-164D16 is ideal for homeowners, contractors, and property managers needing a dependable exterior sillcock that resists freezing, prevents backflow, and endures heavy use. If you want a serviceable, heavy-duty outdoor hydrant that fits inside standard residential walls and minimizes noise and maintenance, this model delivers professional-grade materials and engineering suited to long-term installations.