Winterize blowout adapter: this winterize blowout adapter is designed to prevent freezing of garden water pipes, sprinkler systems, and faucets by blowing water from tap water or pipes, this is a convenient antifreeze and antifreeze method Brass material: winterize adapter is made of solid brass construction for durability, will last you for long term The size of threaded connection: this winterize blowout adapter is standard threaded connection in most cases, with a 1/4 inch male air compressor quick plug to a male 3/4 inch garden hose inner thread, easy attach air line to water lines or hose system to make a nice winterization solution Wide applications: fits for various water system, such as RV, camper, boat, travel trailer etc., such a vehicle with a water supply system, to blow out or winterize with an male garden hose thread Easy to operate: screw the water pipe to the female thread side and connect the quick plug to the quick coupling onside the air compressor line, turn on the air compressor and rotate around the ball stem to open or close and adjust the air flow rate to blow dry water from the water pipe