Zurn 112-sxl 1-1/2 in. Fnpt x fnpt strainer -lead free cast bronze – 20 mesh screen – 300 wog recommended for a variety of water service lines including residential and commercial irrigation, swimming pools and cooling tower water. They are also designedto protect delicate equipment such as regulators and backflow preventers by filtering sediment which could cause premature failure. standards compliance nsf listed – standard 61, annex g certified to nsf/ansi 372 by iapmo rt