Clear vinyl hoses

Here are the exterior diameters of the different clear vinyl hose sizes commonly found in spas and hot tubs:

• 1/4 inch: 9 mm
• 3/8 inch: 14 mm
• 1/2 inch: 21 mm (adapter to 20 mm available)
• 3/4 inch: 27 mm (adapter to 25 mm available)