Brass Sweat Connector 1" inside and 1.25" outside NPT w/oring ( 41242-01, or just 41242 ) used on Fleck 7000 and other Pentair Water Products.
Used to connect Fleck 7000 By Pass or Valve to the water pipes. Also, used as a Quick Connect fitting for Structural CT ( contact tanks ) made after May 2008.