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.
Brass Fitting can be "sweated" to 3/4" Pipe fitting. PN V3007-03, newer V3007-03LF or CL07-CT
For 3/4" copper.
Part Number: V3007-03LF
Usually Ships in 1 to 2 Business Days