These devices are not a new form of technology as they have been around in public buildings such as bhotels/b and healthcare environments. Despite their prominence in the public institution market, their popularity in domestic bathrooms have yet to increase. ... The bvalve/b may control only the shower, or if it is a diverter bvalve/b, both the shower and tub. It will work to keep the water temperature at a safe level, despite fluctuations in water supply lines. ...