derbyan. faucet design. February 22nd , 2018.
For modern faucets, the truth is quite opposite though. The touch function is reliable and under normal conditions always works as expected. These faucets cannot be activated by pets, and they are helpful for families with children.
To disassemble unscrew the setscrew and pull off handle. Though these faucets are washerless, they do have inlet and outlet seals that may leak, or sediment may build up inside the inlets and cause leaks. After removing the escutcheon cap, lift out the cylinder and clean the neoprene seals and cylinder openings. Be sure the faucet is in the "open" position when replacing seals.
A good touch sensitive kitchen faucet will never turn on by itself. They can be used on any type of sinks including metal ones. In the dawn of touch sensitivity in faucets, they had a number of problems including turning on too often by accident. In modern faucets, these problems are eliminated. It is wise, however, not to rely on just any touch sensitive faucet out there. There are cheap faucets without even name or brand that offer you a bunch of advanced features. If you buy one of them, it′s a gamble. In my opinion, the safest way to go is finding a brand whose touch sensitive faucets have proved to be reliable. The information available online can help a lot. User ratings, comments and reviews can give you a better idea about the quality. Be aware though that even the best faucet won′t work as expected if installed on a metal sink with insufficient insulation. In this case, the sink itself can become a "continuation" of the faucet, and it will turn on just by touching the sink. The problem will be gone when the faucet is installed with a proper insulation.
The cleverly engineered touch sensitivity system distinguishes between "touch" and "grip". When you tap it, your hand needs to be removed from the faucet within a fraction of a second. If the hand stays on the faucet, it is identified as a "grip", and the faucet does not respond. So it is practically impossible for pets to activate it.