Holdrite Flexible Stainless Steel Water Heater Connector, Female Iron Pipe Fitting, 1-Inch FIP x 3/4-Inch FIP, 24-Inch Length, Quickflex QFC-17524 Flexible corrugated steel connectors for hot water heaters. Flexes but is highly resistant to kinking Pressure rating: 125 PSI Service/200 PSI Max Temperature rating: 190 Degrees Fahrenheight FIP x FIP swivel nut connectors for easy installation Designed, machined, and assembled in the USA