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 the 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 Double threads on both ends: 1 inch MNPT and 3/4 inch FNPT, flush out valve has garden hose barb fitting