My Hayward 1100 StarClear filter lasted 27 years; amazing. But when it came time to replace it, the old model is no longer available and the new one was $573. This filter is obviously a Chinese knock-off (HaWorld is the brand!), but the included cartridge is high density and 20% more surface area (150) than the current Hayward version (120). Filter is VERY tall, as you can see in photo. I used flexpipe PVC instead of trying to get all the PVC fitting perfect, was relatively easy to do. Total cost including PVC fittings and flexpipe was about $350, and so far nothing leaks, have 6lbs of pressure on the system, tons of volume with my old WhisperFlo pump and generic motor. No complaints so far, will see how it holds up. This type of filtration system is pretty simple, very little to go wrong, and has served my in-ground pool well for the last 27 years. Also, the fittings I bought were the expensive screw-together type, so if anything does leak I can remove and repair without having to re-do everything.