Ultimate Guide on 18 Parts of a Sink: Names, Functions & Diagram

A sink is a highly useful and functional plumbing fixture that typically takes the form of a bowl-shaped basin. It serves a variety of purposes, including hand-washing, dishwashing, and other related activities. Sinks are typically equipped with taps or faucets, which are responsible for supplying both hot and cold water. In addition, many sinks may also include a spray feature that enables users to rinse items more quickly and effectively. One of the most vital parts of a sink is its drain, which is responsible for removing used water from the basin. To help prevent clogs and other plumbing issues, many drains may include a strainer or shut-off device to prevent unwanted debris from entering the plumbing system.

Parts of a Basin Diagram

Parts of a Sink, Names, Functions & Diagram

Basin Parts Names

  • Basin
  • Drain
  • Faucet
  • Mounting Hardware
  • Overflow
  • P-trap
  • Tailpiece
  • Water supply lines
  • Pop-up drain stopper
  • Rim
  • Escutcheon
  • Supply valves
  • Trap arm
  • Cleanout plug
  • Strainer
  • Sink clips
  • Sealant
  • Trap primer

Parts of Basin & their Functions


The basin, a wondrous marvel of engineering, is the epicenter of a sink’s universe. Its curvaceous, bowl-shaped design deftly collects and transports water to its final destination, allowing for a range of tasks to be accomplished with ease.

This functional masterpiece can handle everything from washing dishes to bathing small animals, making it an indispensable tool in any household.

But the basin is more than just a functional feature of the sink. It is a canvas for creativity and innovation, with manufacturers experimenting with a wide variety of materials, colors, and textures to create truly unique designs.

Some basins are crafted from exotic materials such as marble or volcanic rock, while others are adorned with intricate designs or hand-painted finishes.


a small opening at the bottom of a basin, quietly and efficiently channeling water away from your sink and down into the depths of the plumbing system. This tiny but mighty component is known as the drain – the unsung hero of any functional plumbing setup.

Without this ingenious invention, your sink would quickly become a stagnant pool of water, overflowing and posing a potential hazard to your health and hygiene. So, the next time you use your sink, take a moment to appreciate the humble drain and its role in keeping your home running smoothly.


A faucet is not merely a device that controls the flow of water into a sink, but rather an indispensable innovation that has revolutionized the way we interact with water.

From the earliest rudimentary designs to the cutting-edge technological marvels of today, faucets have evolved to become more than just functional plumbing fixtures. They are now sleek, stylish, and engineered with precision, providing a user experience that is both intuitive and efficient.

Gone are the days of struggling with leaky or squeaky faucets that waste water and drive up utility bills. Today’s faucets incorporate innovative features such as touchless activation, water-saving aerators, and temperature and pressure control that enhance the user experience while also promoting water conservation.

With a range of materials and finishes available, including stainless steel, bronze, and brushed nickel, faucets have become a critical element in kitchen and bathroom design, reflecting the homeowner’s style and personality.

Read More- Ultimate Guide on Parts of a Faucet: Names, Functions & Diagram

Mounting Hardware

Sink mounting hardware may seem like a minor detail in the grand scheme of sink installation, but it plays a vital role in ensuring the sink’s stability and preventing any potential water damage disasters.

These small but mighty components are like the unsung heroes of sink installations, holding everything together and keeping things from falling apart.

However, not all sink mounting hardware is created equal. Depending on the sink’s size, shape, and weight, as well as the material of the countertop or vanity, the appropriate mounting hardware must be selected. From stainless steel brackets to plastic clips, each type of hardware has its strengths and weaknesses.


The overflow mechanism is a vital feature in the plumbing system that serves as the last line of defense against potential water damage disasters. It is a small opening situated near the top of a sink or basin that comes into play when water levels in the sink reach their maximum limit.

In such cases, the overflow provides an alternate pathway for the water to drain out of the sink, preventing it from spilling over and causing damage to the surrounding area.

Interestingly, overflows are not only present in household fixtures like sinks and basins but also in industrial-sized tanks and vessels used in various industries. These massive overflows are designed to handle millions of gallons of water and other fluids, preventing catastrophic spills and environmental damage.


Its unique and innovative design is a force to be reckoned with, serving a vital purpose in keeping your living environment safe and hygienic.

Crafted with precision, the P-trap’s curved shape creates an impenetrable water seal that thwarts the attempts of harmful gases and debris from entering your home.

Its unparalleled defense mechanism ensures that your indoor air quality is top-notch, providing you with a refreshing and rejuvenating environment to thrive.

But that’s not all – the P-trap is also a master at preventing clogs and blockages in your plumbing system. As water flows through its curvaceous design, it creates a swirling vortex that dislodges any obstructions, keeping your pipes free and clear of any blockages.

With the P-trap at the helm, you can be sure that your plumbing system will run smoothly, saving you time and money on costly repairs.


connecting the drain to the P-trap and ensuring the smooth flow of water and waste from your sink or basin. It may be a small component, but it plays a crucial role in keeping your plumbing system running smoothly and preventing costly clogs and backups.

Tailpieces are available in a variety of materials, including PVC, chrome-plated brass, and stainless steel, each with its own unique benefits and drawbacks.

PVC tailpieces are lightweight, easy to install, and affordable, while chrome-plated brass tailpieces are more durable and resistant to corrosion. Stainless steel tailpieces are the most durable and long-lasting option, but they can also be more expensive.

The length and diameter of your tailpiece can also have a significant impact on the performance of your plumbing system. A tailpiece that is too long can cause slow drainage and backups, while one that is too short can result in leaks and water damage.

Regular maintenance and cleaning of your tailpiece are essential to prevent clogs and keep your plumbing system functioning correctly.

Water Supply Lines

Water supply lines, also known as the “lifeblood” of a building, are the essential conduits that deliver clean and safe water for various domestic and commercial purposes.

They serve as the veins and arteries of a plumbing system, ensuring a steady flow of water to faucets, sinks, showers, and other fixtures.

Without water supply lines, buildings would be unable to meet basic needs, such as drinking, cooking, cleaning, and sanitation, leading to serious health and hygiene problems.

That’s why it’s essential to use high-quality materials, such as copper, PEX, or CPVC, to ensure durability and longevity.

Pop-up Drain Stopper

A pop-up drain stopper is a simple yet innovative device that serves the purpose of preventing water from draining out of a sink. With a simple push of a button or pull of a lever, the stopper rises up and creates an airtight seal against the sink, effectively locking in the water and preventing any escape.

This means you can fill up your sink to your heart’s content, whether it’s for washing dishes, soaking laundry, or even taking a luxurious bubble bath.

But the benefits of a pop-up drain stopper don’t stop there. Many models come equipped with additional features that take their functionality to the next level.

For example, some stoppers have built-in overflow protection, which prevents water from spilling over the top of the sink and causing a mess. Others feature anti-clog technology, which helps to keep your drain clear and prevent nasty blockages from forming.

And let’s not forget about style. Pop-up drain stoppers come in a wide range of materials and finishes, from sleek stainless steel to eye-catching chrome and everything in between. So not only will your sink be more functional, but it will also look better than ever.


It’s the often-overlooked component that holds everything together and ensures the sink’s stability. However, the design and construction of the rim can make or break the sink’s functionality and overall aesthetic.

Some sink rims are designed with a raised edge to prevent water from spilling onto your expensive countertops or damaging your floors.

Others may feature a sloped surface to allow for better drainage and eliminate the dreaded puddle of water. Furthermore, the rim’s material can drastically impact the sink’s look and feel, with options ranging from modern and chic stainless steel to classic and elegant porcelain.


An escutcheon is not just a simple decorative plate to cover up the holes in your bathroom or kitchen countertop where your faucet and handles are mounted. It’s an exceptional accessory that can elevate your space’s style and functionality to new heights.

As a decorative piece, escutcheons come in an incredible variety of materials, shapes, and finishes. From luxurious marble to modern acrylic, you can choose a style that complements your bathroom or kitchen’s existing design, or go for an eye-catching contrast to create a bold statement.

In addition to their aesthetic appeal, escutcheons are incredibly functional. They protect your bathroom or kitchen walls from water damage and mildew growth by preventing water from seeping into the wall behind your fixtures.

Supply Valves

These valves act as the gatekeepers of your water supply system, preventing leaks, bursts, and other water-related disasters from wreaking havoc in your home or building.

And when it comes to your faucets, supply valves play a critical role in regulating the flow of water, allowing you to enjoy a steady stream of water that’s just right for washing dishes, brushing your teeth, or taking a relaxing shower.

Trap Arm

The trap arm is like the mighty bridge that connects the world of your plumbing to the vast sewer system beyond. It is the horizontal hero that joins the P-trap and the main drain line in a union of waste removal efficiency.

Neglecting the importance of this key component could lead to a disastrous plumbing catastrophe, causing foul odors, messy backups, and potential health hazards. To avoid such a plumbing apocalypse, be sure to maintain your trap arm regularly and keep it in tip-top shape.

Cleanout Plug

A cleanout plug is like the secret trapdoor to the underworld of your plumbing system. It’s a powerful tool that grants access to the inner workings of your drains, allowing you to peer into the abyss and confront any lurking monsters.

With a simple twist or pull, you can remove the plug and dive headfirst into the depths of your pipes, armed with only a plunger and a sense of courage.

Whether you’re battling stubborn clogs, tackling routine maintenance, or just exploring the unknown, the cleanout plug is your trusty companion on the perilous journey that is plumbing.


This is the strainer, a removable filter that fits snugly over your drain line to prevent all manner of gunk and grime from causing chaos in your plumbing system.

The strainer is a true hero in the world of home maintenance, with its ability to catch everything from hair and soap scum to food scraps and pet fur.

And thanks to its innovative design, it’s a breeze to clean and reuse time and time again, making it both a practical and eco-friendly choice.

Sink Clips

They are the silent guardians that keep your sink from wobbling or shifting, preventing disaster and potential damage to your countertop or vanity.

These clips are not just mere accessories; they are the essential foundation that holds your sink securely in place, ensuring its longevity and stability.


This specialized adhesive is a game-changer when it comes to sealing gaps and preventing liquids from seeping into the crevices. It’s like a force field that locks out moisture, keeping your surfaces safe and sound.

But that’s not all – a sealant also adds a touch of style and sophistication to your bathroom or kitchen, creating a sleek and polished look that’s sure to impress.

Trap Primer

The trap primer is like a vigilant guardian, constantly monitoring the drainage system and ensuring that the water seal remains intact.

Without this ingenious device, the P-trap could dry out, allowing dangerous sewer gases to infiltrate the room and create a hazardous environment for you and your loved ones. But thanks to the trap primer, you can breathe easy knowing that your plumbing system is protected from the threat of noxious fumes.

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