The
Elkay and Halsey Taylor Regulator Housing - 50985C is a cartridge / regulator housing that contains two 1/4" John Guest type quick connect fittings. This cartridge / regulator housing
does not contain the ring that will hold the cartridge / regulator in place.
The retaining ring that is used with this housing is the
Elkay / Halsey Taylor Retaining Nut - 10031C