Stainless steel mesh filter screen rated at 50 Micron. WSP series can be used for waste water treatment by spin down the sediment. Ideal first layer of filtration before a larger filtration system Flushable and reusable, takes considerable workload off finer filters that follow behind it; helps create a multi-layer gradient filtration system for better filtration results and longer filter life See through housing offers easy visual monitoring; lead-free brass body with 1-year warranty Comes with Two 3/4" Lead-free Push-Fit Plumber Fittings for connecting standard PEX, PVC, CPVC and Copper pipes; Flush out valve has garden hose barb fitting