Fitting ( solds as set of two each ) is made to connect to the Valve or By Pass Valve for Clack WS1 Valve and other "brands" that use the Clack type of valve under their private label.
PVC Fitting can be glued to I.D. which fits 1 1/4" or the O.D. which fits 1 1/2" PVC Pipe fitting.
PN 3007-07 or C1215-PVC