A sink is a bowl-shaped plumbing fixture used for washing hands, dishes, and other purposes.Sinks have a faucet (faucet) that supplies hot and cold water, and may include a spray function for faster rinsing.They also include a drain for used water; this drain may itself include a filter and/or shut-off and an overflow stop.Sinks may also have an integrated soap dispenser. Many sinks, especially in the kitchen, are installed near or within the counter.When a sink becomes clogged, people typically resort to using chemical drain cleaners or a plunger, although most professional plumbers use a drain auger (often called a "plumber's snake") to clear the clog.

Materials 

Sinks are made of many different materials. These include:

• Ceramics

• Specific

• Copper

• Enamels on steel or cast iron

• Glass

• Granite

• Marble

• Nickel

• Plastic

• Polyester

• Porcelain

• Bloodstone

• Stainless steel

• Stone

• Terrazzo

• Wood

Stainless steel is most commonly used in kitchen and commercial applications as it represents a good balance between cost, usability, durability and ease of cleaning.Most stainless steel sinks are made by drawing a sheet of stainless steel over a mold.Some very deep sinks are made by welding.Stainless steel sinks are not damaged by hot or cold objects and are resistant to damage from impacts.One downside to stainless steel is that, being made of thin metal, they tend to be noisier than most other sink materials, although the better ones have a thick layer of vibration dampening material on the bottom of the sink.Enamel on cast iron is a common material for kitchen and bathroom sinks.These sinks are durable and come in a variety of shapes and colors.Like stainless steel, they are very resistant to hot or cold objects,but they can be damaged by hard impacts, and once the glass surface cracks, the underlying cast iron often corrodes, flaking off more glass.Over-cleaning can darken the surface, causing more dirt to build up. Enameled steel is a similar looking but nowhere near as strong and less cost effective alternative.Solid ceramic sinks have many of the same properties as enamel on cast iron, but without the risk of surface damage leading to corrosion.

Plastic      sinks come in a few basic forms:

Inexpensive sinks are made using only injection molded thermoplastics.These are usually the deep, freestanding sinks used in laundry rooms.Easily damaged by hot or sharp objects, the main advantage of these sinks is their low cost.High-end acrylic recessed (below the countertop) and undermount (mounted from the bottom) sinks are gaining popularity, although they tend to be easily damaged by hard objects such as scrubbing a cast iron skillet in the sink.Plastic sinks can also be made from the same materials used to form “solid surface” countertops.These sinks are durable, aesthetically pleasing, and can often be molded with a one-piece countertop or joined to a separate countertop in a seamless manner, resulting in no sink-to-deck joints or very smooth sink-to-deck joints that won’t trap dirt or bacteria.These sinks are easily damaged by hot objects, but the damaged area can sometimes be sanded to expose undamaged material.

Soapstone sinks were once common, but today tend to be used only in very high-end applications or where they must resist the aggressive chemicals that would damage more traditional sinks.Wooden sinks are from the early days of sinks and tubs are made of natural teak with no additional finishing.Teak was chosen for its natural water resistance  it has been used in the marine industry for hundreds of years for this reason.Teak also has natural anti-corrosion properties, which is a benefit of using it for bathtubs and sinks.Glass Sinks:The current trend in bathroom design is handcrafted glass sinks (commonly known as vessel sinks), which have become fashionable in wealthy homes.Stone sinks have been around for a long time.Some of the more popular stones are: marble, travertine, onyx, granite, and soapstone for high-end sinks.Glass,concrete and terrazzo sinks are often designed for their aesthetic appeal and are available in a variety of unusual shapes and colors, such as floral shapes.Concrete and terrazzo are also occasionally used in very heavy duty applications such as cleaning sinks.