NR3XL 1" WATER PRESSURE REDUCING VALVE WITH INTEGRAL BY-PASS CHECK VALVE AND STRAINER. SPECIFY CONNECTION TYPE.(PICTURE SHOWS SINGLE UNION SWEAT X FNPT) (replaces BR4 series wilkins-nr3xl-1$73.25CONNECTION TYPE: fnpt x fnpt(no unions)single union sweat X fnptsingle union fnpt x fnptdouble union fnptdouble union sweat