Spa jet inserts are easy to replace, just remove the jet insert from you hot tub and match a replacement jet from our selection. CMP jets are available a 5 different sizes and a few different styles from just the standard grey face to the shiny Stainless Steel trimmed styles. When looking for replacement jets for your hot tub make sure that the manufacture of the jet is identified. Waterway jets and CMP jets appear to look the same but they are in fact different enough that they are not interchangeable for the most part.