Quote Originally Posted by dcarlton View Post
Got to the bottom and the big white plastic tube was broken off right at the joint to the laterals. Off to the pool supply store for a new lateral assembly plus new sand.
That'll do it! For whatever reason, the plastics used inside filters are often not the greatest in quality -- they may be ABS. My guess is the low-grade plastics are easier to mold than a high-grade PVC or CPVC. Regardless, these plastics seem to get brittle and fragile over time, and are easy to break when removing and replacing sand or parts.