This diffuser is for use with Hayward Super Pumps. The diffuser's purpose is to reduce the velocity of the impeller's flow, creating a pressure increase. With the pool as the centerpiece of the rapidly growing Outdoor Living market, Hayward is prioritizing innovation, efficiency, and comfort. We’ve built industry-leading equipment, filters, and pumps for over 100 years, and today, we are at the forefront of innovation for pool and outdoor living technology and internet-connected homes.