This is a genuine factory Halsey Taylor / Elkay 50986C Cartridge Housing and holds the regulator in the drinking fountain.
This part can also be purchased in the following kits:
Kit # 98536C is used on Elkay and Halsey Taylor top push-button activated models.
Kit # 98731C is used on Elkay and Halsey Taylor push-button activated models, except SCWT Series.
Kit # 98732C is used on Elkay and Halsey Taylor push-bar activated models and SCWT Series.