Rigid pipes

Here are the exterior diameters of the different rigid pipe sizes commonly found in spas and hot tubs:

• 1 inch: 33 mm (available adapter to 32 mm)
• 1.5 inches: 48 mm (available adapter to 50 mm)
• 2 inches: 60 mm (available adapter to 63 mm)
• 2.5 inches: 73 mm