Look all around the curves of the faucet and the handles to be sure that you aren’t missing a subtle representation of the faucet brand.

If you’re working with a sink faucet, the stop valves should be located underneath the sink and all the way back. [6] X Research source If you can’t find the stop valve, you may need to shut off your entire home’s access to water. To do this, find the main shut off valve and turn it clockwise. The main shut off valve is most likely located inside near your water meter.

Other brands that have " D " shaped brooches include Moen and Mixet.

To double check, measure the broach. If it measures 0. 375 inches (0. 95 cm), then it’s likely an old American Standard model, and if it measures 0. 438 inches (1. 11 cm), then it’s likely a current American Standard model.

To double check, count the splines on the broach. Fisher broaches typically have 12-point broaches. Some other brands that have broaches that measure 0. 39 inches (0. 99 cm) include Bradley, Elkay, Sears, and Universal Rundle.