Hayward Union Adaptor (Converts WW 1 ½" Union to Hayward Threads)

The Waterway poly storm hot tub jet diffuser 218-4000 fits the snap-in style jets. This diffuser snaps onto the back of the Waterway poly storm jet face (not included). Hot tub jet diffusers can become worn over time from the chemicals in hot tub water and start to pop out. Replacing just the back diffuser part can be an alternative to replacing the complete jet. Details: Waterway P/N: 218-4000 Genuine Waterway part Colour: White Fits: Waterway poly storm snap in style jets only Please note This diffuser may look similar to the CMP brand snap-in style jet diffuser, but Waterway and CMP brand diffusers are not interchangeable.