Patent ID: 8006712

Claim:
A method of controlling fluid flow to a faucet spout in fluid communication with a cold fluid source delivering a cold fluid and hot fluid source delivering a hot fluid, the method comprising: connecting an outlet of a valve apparatus to the faucet spout; connecting a first inlet of a valve apparatus to the cold fluid source; connecting a second inlet of the valve apparatus to the hot fluid source; mounting a first sensor that includes a photodiode at a first location spaced apart from the faucet spout; mounting a second sensor that includes a photodiode at a second location spaced apart from the faucet spout; activating the first sensor without touching the first sensor to allow a proportion of the cold fluid to the hot fluid to be delivered to the faucet spout; and activating the second sensor without touching the second sensor to alter the proportion of the cold fluid to the hot fluid; wherein the method further comprises waving a hand over the second sensor to alter fluid flow from cold fluid to warm fluid; waving a hand over the second sensor again to alter fluid flow from warm fluid to hot fluid; and waving a hand over the second sensor yet again to alter fluid flow from hot fluid to cold fluid.