Uponor Manifold Supply and Return Ball Valves are R32 male by R32 female that fit directly on Uponor TruFLOW™ and Engineered Polymer (EP) Heating Manifolds. A2631250 and A2631251 come standard with a temperature gauge for easy visual check of supply temperatures. A2631250 also features a built-in filter ball which has isolation within the valve to facilitate cleaning of the filter.