Prier C-634N10 10-Inch Heavy Commercial Self-Draining Anti-Siphon Freezeless Hydrant with 1-Inch MPT and 3/4-Inch FPT Prier has made great efforts in developing unique, cutting edge products based on feedback 10 inch Heavy commercial, self draining, loose key operated wall hydrant. 1" MIP x 3/4" FIP Includes backflow preventers and a vacuum breaker