You identify the faucets by their single handle that moves over a rounded metal ball that easily shifts and spins thus creating different water flows and temperatures. The ball has chambers and spring loaded rubber seals. The handle rotates easily allowing you an exact mix of hot and cold water. It's good to note that these faucets don't have washers. Due to the many parts in these faucets, they tend to leak more than other washerless faucets such as disc and cartridge.
There are two main types of cartridge faucets: one and two handle faucets. A single handle faucet operates in an up/down motion to adjust water volume and left/right motion to adjust the temperature. From outside, a double handle cartridge faucet is identical to a compression washer faucet. You can tell the difference by noting how the handle feels when used. A compression faucet requires you to tighten down the washer in order to close water flow while a cartridge faucet requires smooth and consistent action to close water flow. When you move the faucet for just ½ turn you are able to move the handle from on to off position.
Two handle: These are able to offer precise control over the water flow adjustment and temperature and splits control for the cold and hot water. Many of these faucets are likely to rely on three or more sink holes.
Families with young children find the touch function extremely useful. It makes the water easier available for the little ones since they just need to tap the spout rather than reach the handle and manipulate it into the desired position. They will seldom leave the water running. Children love to tap the water off just for fun. But even if they forget, the water will be turned off automatically after some time of inactivity. I am not speaking here of the quality and longevity. In today's faucets, they are self-evident. The rubber washer systems have been replaced with ceramic valve cartridges. These cartridges are durable, the seal is tight and the faucets have lifelong warranties for leak-free performance. This may not be true, however, for some low-end items without brand names.
Just like the most modern kitchen faucets, disc faucets have a single handle that controls temperature and water flow. These faucets function through the use of two discs within the valve that open and close in order to control the flow of hot and cold water. To control the water temperature you should do so using the side-to-side rotation of the handle. The cool thing with disc faucets is that they are of high quality and very reliable. Since they don't have many parts they don't leak a lot.
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