The Camco RV Freshwater Blow-Out Hose with Ball Valve is a winterization tool that aids in the removal of water from your water lines and eliminates the need to use expensive antifreeze. It's ideal for boats, RVs, and sprinkler systems. This kit includes a flexible, 6" hose with ball valve and durable brass fittings. The flexible hose can access tight spaces and reduces strain on your pipes and fittings. The ball valve allows you to control the air flow rate. Easy to use; simply attach the barbed fitting to the air compressor quick-connect hose and the 3/4-11 1/2 NH male garden hose fitting to your RV or boat's city water inlet.• Aids in the removal of water from your water lines• Eliminates the need to use expensive antifreeze• For use with an air compressor• Ideal for boats, RVs, and sprinkler systems• Flexible 6" hose with ball valve and durable brass fittings• Ball valve allows you to control the air flow rate• 3/4-11 1/2 NH male garden hose thread connects to a standard garden hose Flexible 6"" hose with ball valve & durable brass fittings For use with an air compressor Male garden hose thread connects to a standard garden hose