Image 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 Image 800 PSI Stainless Steel Check Valve Image Ball Cone Check Valve Female NPT x Female NPT Image Check Valve Image Dixon Cam & Groove Type D Coupler x Female NPT Image King Combination Nipple NPT Threaded End No Knurl Image Spring-Loaded Check Valve Image Strainer with Spring-Loaded Check Valve