Well I've been lurking here for 2 years now and so far have found an answer to every question i have had until now. My problem is with my pump a Hayward Tristar sp3215ee to be exact. It is now on its 2nd season and I have had to replace the diffuser twice. Both times the diffuser had cracked and the impeller ring was inside my impeller. I open my pool over the weekend and my pump has done it again. Any idea why my pump keeps breaking? I have emailed Hayward but have not received a response. Do diffusers break often? I am tired of replacing the same $20-30 part every couple of months. Please help.