The Hayward SPX4000Z1 Diffuser O-Ring is a key component for pool and spa equipment that ensures a tight and leak-free seal between the diffuser and the pump casing. This O-ring is made of premium rubber and is designed to survive a variety of challenging operating environments, such as exposure to chemicals and fluctuating temperatures. By stopping water leaks and guaranteeing effect... https://www.usapoolshop.com/spx4000z1-hayward-diffuser-o-ring