From mfg:
The NIBCO frost-proof sillcock is designed with an integral vacuum breaker and a self-draining feature that prevents freezing by allowing the water to drain. The epoxy-coated aluminum hand wheel with an ergonomic grip includes a flow indicator. The frost-proof sillcock is ideal for use in low-pressure residential and commercial water systems.
180° turn capability
threaded end connections
Used in residential plumbing systems