Bild Ball Cone Check Valve Male NPT x Female NPT Jump to Section Product Options Related Products Product Options Part Number Size Male Thread Female Thread Material 61-201 1/4" NPT NPT Brass 61-202 3/8" NPT NPT Brass 61-203 1/2" NPT NPT Brass 61-204 3/4" NPT NPT Brass 61-205 1" NPT NPT Brass 61-206 1-1/4" NPT NPT Brass 61-207 1-1/2" NPT NPT Brass 61-208 2" NPT NPT Brass Related Products Bild 800 PSI Stainless Steel Check Valve Bild Ball Cone Check Valve Female NPT x Female NPT Bild Check Valve Bild King Combination Nipple NPT Threaded End No Knurl Bild Spring-Loaded Check Valve Bild Strainer with Spring-Loaded Check Valve