EZ-Fluid 1-Inch FIP x 3/4-Inch FIP x 18-Inch Corrugated Flexible Stainless Steel Water Heater Connector For Female Iron Water Pipes Fitting Also For Water softener,Filter, (1-Pc) - Amazon.com
Hose Master FSMS Series 2 in. Male x Male Swivel FireShield Flexible Metal Hose Connector - John M. Ellsworth Co. Inc.