Pipe fittings

Our catalogue includes all the fittings most commonly used in hot tub and spa plumbing, including straight connectors, elbows, couplers, reducers and adapters. We offer fittings in metric sizes, but also and especially in inches.

Below are the inside diameters of the different female fittings that are commonly found in spas and hot tubs. These sizes correspond to the outside diameter of the pipe, of course.

  • 1/4 inch: 9 mm
  • 3/8 inch: 14 mm
  • 1/2 inch: 21 mm
  • 3/4 inch: 27 mm
  • 1 inch: 33 mm
  • 1.5 inches: 48 mm
  • 2 inches: 60 mm
  • 2.5 inches: 73 mm

2-inch
1.5-inch
1-inch
3/4-inch
1/2-inch
3/8-inch
63 mm
50 mm
40 mm
32 mm
25 mm
Other sizes