1 1/2 Inch Spin-Down Sand Separator Replacement Filter Screen FS1-1/2-RE by Rusco

It works very well.I'm using the Rusco FS1-1/2-250 for heavy sand filtration.I probably need/should clean it every month, but usually clean it every 2 months.It's a good idea to replace with a new filter every year, depending on use (ours is a family of 4).