Prier 1/2 In. SWT x 1/2 In. x 8 In. IPS Anti-Siphon Wall Hydrant is a reliable and efficient solution for outdoor water access while preventing zing and back-siphoning. This wall hydrant is designed to provide self-draining and frostproof functionality, ensuring protection against zing temperatures that can cause outdoor hydrants to ze and burst pipes. With its integral anti-siphon design, it safeguards against undesirable back-siphoning that could contaminate the potable water system. Unlike some anti-siphon attachments that require manual draining to prevent zing, this hydrant is self-draining and requires minimal maintenance, making it an i choice for durable and safe outdoor water supply. Model Number: 478-08