benjamin. faucet design. February 22nd , 2018.
For pull-down models, the hose needs to be guided through the faucet body and spout, for touch sensitive models, there will be a battery pack that needs to be connected to the contacts.
One of the first things to know before shopping for a faucet is your hole configuration. Most sinks come with holes drilled to receive the faucet and sometimes accessories such as a sprayer, soap dispenser, hot beverage or filtered water faucet. One hole sinks are for single-control faucets, three hole are for single-control faucets with a sprayer and/or accessories and four holes are for single-control or two-handle sinks with various accessories. If you have an under-mount or apron front sink the holes are drilled into the countertop behind the sink.
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.
There may be a number of well-grounded reasons for not having touch sensitive faucets in your kitchen. The most widespread one is by far the price that is much higher for touch faucets than for their non-sensitive versions. Some other reasons might be affection for traditional ways, firm determination not to spoil yourself and your family with too effortless ways or plain reluctance to mess with batteries when they need to be changed.