Bypass 3/4″ Valve 1″ Male Thread
Part # 7129871 Old Part #42-3437
By Pass 7129871 ( very old PN 42-3437 ) used on the standard valve common for most Sears, North Star, GE, and Ecowater systems.
GE part # WS15X10012
Comes with 2 o-rings ( 7170288 ) but Not Clips (7116713), sold separately.
Plastic “body” of the by pass has part number 625.34372. And that number is molded into the plastic.
Replacements have large handle at one end, as shown in our alternate photo.
This is how they are made now ( since 2012 ).
The center to center spacing for the threaded connector is approx 2 1/4″
And the center to center spacing for the mountings that go into the water softener itself is about 3 3/8 of an inch.