1、Function: This adapter is designed to keep garden hoses, sprinkler systems and faucets from freezing by blowing water from mains or pipes, which is a convenient method of antifreeze and freeze protection. 2、Premium Material: The adapter is made of lead free brass material, and the sturdy structure makes it not easy to break or deform, which greatly increases the service life of the product. 3、Standard Threads: 1/4in male quick connect plug and 3/4in male GHT thread for easy connection of air lines to water or hose systems. 4、Wide Application: Brass antifreeze adapters are suitable for many systems such as motorhomes, boats, travel trailers, vehicles with water systems, blow out or freeze protection with externally threaded garden hoses. 5、Easy Installation: Easy operation, screw the water pipe to the female side, connect the quick plug to the quick connector, easy attach air line to water lines or hose system to make a nice winterization solution.