Double Sinks
Basically a double sink is one that has the basin area divided in to so you have two bowls that can be used for different purposes. This handy feature is very good for doing dishes in that you have one basin in your double sink with the detergent water for washing the food particles and a second basin filled with clear rinse water. Conversely it can be left open and keep the faucet running with new waters so there is no accumulation of soap in the rinse cycle. These double basin kitchen sinks were originally developed in farmhouses where the work load was great due to feeding both families and workers.
The double sink has been modifies in several ways from its original same size basins. A one and a half double sink has a large and a small basin for those who need such space saving properties. Other double kitchen sinks have a slanted drain board area on one side so that water can drain off cleaned dishes and return to the rinse basin, thus preventing spillage onto the counter top. Sometimes one basin of the double sink will have a garbage disposal attached to facilitate food waste removal. You can install drop in double kitchen sinks that fit in the counter top or choose to get a double kitchen sink that has its own splashboard built onto the back.
Double sinks have developed many other uses in multiple industries. The double sink motif has been frequently utilized in the hotel industry. Bathroom vanity areas often have two single basin sinks on a countertop to accommodate travelers on the go. Even though these vanity double sink basins are not joined, they are still referred to as "double sinks".
They are very common in the food service industry where are large quantity of dishes and cooking pans must be done. These utility double sinks are usually about 2 foot square by 18 inches deep and will sometimes actually include a third basin for sanitizing purposes. They are also an industry standard for janitorial services.
Plumbing a double sink is not very hard. A standard "Y" joint will join the two basin drains in the middle. The rest of the exit pipe remains the same. The only time you would need to replace more of the kitchen plumbing pipe would be if you installed a garbage disposal to one which would require a different joining link near the floor.