Hose Clamps & Hose Connectors
The diameters of hoses and connection fittings are often given in inches. The handy table below converts these measurements into millimeters for the hose connections of pumps, faucets, toilets, thru hulls etc. These measurements always refer to the inner diameter of the hose in question.
| Inner-Ø mm | Inner-Ø Inches |
| 12.7 | 1/2" |
| 15.9 | 5/8" |
| 19.1 | 3/4" |
| 25.4 | 1" |
| 31.8 | 1 1/4" |
| 38.1 | 1 1/2" |
| 44.5 | 1 3/4" |
| 50.8 | 2" |