I have owned my Jacuzzi Hot TUb J-300 Series Since 2002. I have only had to replace this jet one time. But you cant expect a jet that has ball bearings to last a lifetime. The way you take care of your spas will determine the legnth the jets are going to last. I make sure I never over chlorinate. If you over chlorinate, then plastic gets britle fast. Then Jets fall apart. I used to have a Cal Spas before the Jacuzzi Hot Tub. I took care of my spa the same way and I went through Jets every couple of years. Jacuzzi has the best qaulity. We all spend more money on our Jacuzzi Brand Spas becasue we want better quality. Jacuzzi does there part by manufactureing a beautiful spa. Then its our part to keep up on the maintenance and chemistry.