LASCO 05-1771 Self Draining Vacuum Breaker with Fine Thread, For Arrowhead 490BPF and 480 Series Hydrants

LASCO 05-1771 Self Draining Vacuum Breaker with Fine Thread, for Arrowhead 490BPF and 480 Series Hydrants.  Arrowheads "Freeze-Tector" represents a revolutionary breakthrough by allowing freeze protection combined with health protection from possible contaminated water sources caused by back-siphonage or backflow. Protects drinking water from harmful contaminants,( pesticides, herbicides, backflow from broken pipes, etc.) Allows water to drain from valve upon shutoff to protect faucet and pipes from freezing and damage.  For optimum freeze protection, vacuum breaker should be at an angle to level ground. NOTE: When using a self-closing nozzle, always relieve pressure in the hose upon water shutoff to activate drainage of hydrant. Do not leave faucet open for more than 12 hours, not designed for constant pressure applications. Water from breaker will drain in a steady gentle stream for approximately 15-20 seconds after hydrant is turned off.  For further guidance and installation, please reference the pdf's provided on the detail page. Worn out gaskets and seals happens with age & use or when hydrant is left on or open with system pressurized for long periods of time. This results in nonstop leaks out of holes in middle section.  Fix by replacing the fine thread vacuum breaker. See pdf for instructions on how to replace the vacuum breaker. Larsen Supply a third generation family owned and operated company with over 80 years of experience has the largest retail plumbing line in the industry today with over 7000 packaged and 16,000 bulk SKU's. We pride ourselves on service, selection and support! All Lasco merchandise if warranted to be free of manufacturing defects. Please revert to retail place of purchase for resolution of any possible plumbing questions, warranty or defective part replacement.