Three signs that your old Sensor Faucets are treading water: Their finish is boring or rough. They still drop even after you repair them. Or, their style looks old with the bathtub renovate you're planning. If that explains your taps, get ready for a sea of replacement choices.If you're changing only the faucets and not the faucet, you have to know which size unit to buy. Begin by eliminating the current Wholesale Faucets and calculating the distance, or spread, between the gaps in the bathroom.