Outdoor Spigot/Faucet Dripper Helps Prevent Pipes From Freezing - SFP0.5 (QTY: 1) STOP FROZEN PIPES Help prevent water systems from freezing, Esay to use - watch it work The SFP0.5 was developed primarily to Conserves water by using 1/2 Gallon per hour Economical to customers and Maintenance Free Easy to install & use. No constant adjusting to maintain water flow during freezing weather