Crack is on the basket side. Picture is with the clamp removed. Seems like an odd failure spot, but I saw another thread on here with a similar problem and read several comments online from people replacing theirs. Pump is only about 3 years old. Maybe they had a bad run of housings. Pump runs year round and has an auto turn on for freezing temps. I tried to call Pentair, but sat on hold forever, and they never called back. Just ordered a new one. ouch.