Ultimate Guide on 24 Parts of a Bathtub: Names, Functions & Diagram

A bathtub is a hydrotherapeutic apparatus widely utilized in both residential and commercial washrooms. It comprises a water reservoir that allows individuals to submerge their bodies for relaxation or cleansing. Bathtubs can be constructed using a range of materials such as porcelain, acrylic, and fiberglass and are available in different sizes and configurations that cater to diverse bathroom layouts and personal preferences. The most commonly used type of bathtub is the alcove tub, designed to be installed against three walls. Parts of a bathtub include the drain, overflow, faucet, handles, and jets (if applicable). These components work in unison to guarantee efficient water drainage and a comfortable bathing experience. Some bathtub models are equipped with additional features such as air jets, LED lighting, and temperature controls, all of which contribute to an enhanced hydrotherapy experience.

Parts of a Bathtub Diagram

Parts of a Bathtub, Names, Functions & Diagram

Bathtub Parts Names

  • Tub
  • Water Supply
  • Water Supply Pipes
  • Shutoff Valves
  • Hand Shower
  • Heater
  • Drain
  • Overflow Drain
  • Waste Outlet
  • Diverter Pipe
  • Handles
  • Jets
  • Bathtub Grab Bars:
  • Bathtub Headrest:
  • Tile or Surrounding:
  • Apron:
  • Non-Slip Surface:
  • Air Bath System:
  • Rim
  • Flexible Connector
  • Trap
  • Retaining Nut
  • Decorative Panel
  • Lining

Parts of a Bathtub & their Functions


The bathtub is a pivotal component of a bathroom, providing a soothing and rejuvenating experience after a long and tiring day. It can be made from various materials, such as acrylic, fiberglass, or cast iron, and it can come in different shapes and sizes to fit various bathroom configurations.

The bathtub can be installed in different ways, including freestanding, built-in, or against the wall, and it can come with various features, such as built-in seats, whirlpool jets, and overflow drains. To ensure maximum relaxation and comfort, choosing the right material, size, and shape is critical.


A faucet is a common household item that provides access to water for various purposes, such as washing hands, brushing teeth, and filling containers.

However, there is much more to faucets than meets the eye. From their history to their modern-day designs, faucets are a fascinating part of our daily lives. In this article, we will explore the extreme uniqueness and informative aspects of faucets.

Read More- Ultimate Guide on 8 Parts of a Faucet: Names, Functions & Diagram

Water Supply

Water supply is a crucial aspect of the bathtub, as it provides the much-needed water for bathing. The water supply typically comes from a municipal water system and is connected to the house through a water meter and a main shutoff valve.

The water is then distributed to various fixtures in the house, including the bathtub, via pipes and valves.

Water Supply Pipes

Water supply pipes are the lifelines of the bathtub, transporting water from the main supply line to the tub. These pipes are typically made of copper, PVC, or PEX and are sized based on the water demand of the fixture.

The size and length of the pipes will depend on the location of the bathtub and the distance from the main water supply. The pipes are connected to the bathtub via a valve and a spout or faucet, which regulate the flow of water into the tub.

There are 2 pipes to supply water in the bathtub, one supplies hot water, and the other cold water.

Shutoff Valves

Shutoff valves are integral components of the plumbing system, including the water supply to the bathtub. These valves are utilized to regulate the water flow into the bathtub and can be found at various points along the water supply pipes.

The primary shutoff valve is generally located near the water meter and is used to shut off the water supply to the entire house in case of an emergency.

There may also be shutoff valves located nearer to the bathtub, which can be utilized to isolate the water supply to the fixture for maintenance or repair.

Hand Shower

The hand shower is a convenient addition to the bathtub that provides a more versatile bathing experience.

Hand showers are usually mounted on a bracket on the wall of the tub and can be utilized to rinse off soap and shampoo or to provide a more targeted stream of water for cleaning. Hand showers can be connected to the same water supply as the tub or can have a separate water supply and valve.


The heater is a component that can be added to the bathtub to provide hot water for bathing. Heaters can be electric, gas, or solar-powered and can be installed either in the bathtub or in a separate location, such as the basement or garage.

The size and capacity of the heater will depend on the size of the bathtub and the hot water demand of the household. A heater can provide a more comfortable and enjoyable bathing experience, especially during cold weather.

However, it is imperative to ensure that the heater is properly installed and maintained to prevent any safety hazards or damage to the bathtub.


The drain is the unsung hero of the bathtub, as it allows water to flow out once you finish your bath. The drain is typically located at the bottom of the tub and connects to a pipe that leads to the home’s plumbing system.

There are different types of bathtub drains, such as push-pull, lift and turn, and trip lever. Each mechanism is unique and serves a different purpose.

Overflow Drain

The overflow drain is a safety feature present in most bathtubs. It is located near the top of the bathtub, above the water level when the tub is full.

In case the water level rises too high, the overflow drain allows the excess water to escape, preventing the tub from overflowing. The overflow drain typically connects to the same pipe as the main drain, leading to the plumbing system.

Waste Outlet

The waste outlet, also known as the waste pipe, carries the wastewater from the bathtub to the home’s plumbing system. The waste outlet is typically located below the drain and is connected to the same pipe as the drain and overflow drain.

Proper installation and maintenance of the waste outlet are essential to avoid clogs and backups in the plumbing system.

Diverter Pipe

The diverter pipe is a crucial component found in some bathtubs with a showerhead attachment. It allows you to switch the water flow between the bathtub faucet and the showerhead.

The diverter pipe connects to the bathtub faucet and showerhead, enabling you to direct the water flow to the desired location.


The handles of a bathtub control the water flow and temperature. There are various types of handles, such as single-handle and double-handle options.

Single-handle handles are easy to use and allow for more precise temperature control, while double-handle handles provide separate controls for hot and cold water.


Jets are a popular feature in modern bathtubs. They are small openings located in the sides or bottom of the tub that release pressurized water, creating a massage effect for the user.

Jets can be adjustable, allowing you to control the intensity and direction of the water flow.Skirt

Bathtub Grab Bars

Grab bars are an indispensable safety feature in any bathtub. They are commonly made of durable materials like stainless steel or brass and are designed to provide a secure grip for the user while getting in and out of the bathtub.

Grab bars can be installed either on the walls surrounding the bathtub or directly on the bathtub itself.

Bathtub Headrest

A bathtub headrest is a comfortable and supportive cushion or contoured pillow that cradles the user’s head and neck while soaking in the bathtub.

Headrests can be made from a variety of materials, such as foam, rubber, and silicone, and come in a wide range of designs and shapes.

The design of a bathtub headrest can range from simple cushioning to more complex contours that conform to the shape of the user’s head and neck. Some headrests can be attached directly to the bathtub, while others are designed to be used independently.

Tile or Surrounding

The tile or surrounding area of a bathtub encompasses the wall and floor coverings that encircle the bathtub. These coverings can be made from different materials like ceramic tile, natural stone, or engineered materials like acrylic or fiberglass.

The design of the tile or surrounding area can vary widely, from plain and straightforward to intricate patterns or mosaics.


The apron of a bathtub refers to the panel that covers the front of the bathtub, concealing the plumbing and creating a finished look for the installation.

Aprons can be made from a variety of materials, including acrylic, fiberglass, and porcelain. The design of the apron can be simple or more elaborate, with raised or textured patterns.

Non-Slip Surface

A non-slip surface is a crucial safety feature in any bathtub. This can be achieved by using textured surfaces or coatings that provide a secure grip for the user, even when the surface is wet.

Non-slip surfaces can be applied to the floor of the bathtub, as well as the surrounding tile or flooring. Materials commonly used for non-slip surfaces include rubber, vinyl, and epoxy.

Air Bath System

An air bath system is a luxurious and therapeutic addition to any bathtub, providing a relaxing and rejuvenating experience for the user.

These systems can be installed in a variety of bathtub styles, including freestanding, drop-in, and alcove designs. The air bath system works by pumping heated air into the bathtub through a series of jets, creating a gentle massaging effect on the skin.

Some air bath systems include additional features like chromatherapy and aromatherapy, enhancing the overall relaxation and therapeutic benefits of the experience.


The Rim is the upper edge of the bathtub, typically made of materials such as porcelain, enamel, acrylic, or fiberglass. It serves as a support for the bathtub, ensuring it can withstand the weight of water and the bather.

The Rim also plays a vital role in directing water towards the drain, preventing it from spilling onto the bathroom floor.

Flexible Connector

The Flexible Connector is a vital plumbing component that connects the bathtub’s drain to the drainage system of the bathroom. It is typically made of PVC or rubber, which offers both flexibility and durability, making it easy to install and maintain.

The flexible connector is crucial in ensuring a watertight seal between the bathtub and the drainage system, preventing leaks and water damage.


The Trap is a plumbing component that sits beneath the bathtub’s drain and serves two critical functions. Firstly, it traps water, creating a barrier that blocks sewer gases from entering the bathroom.

Secondly, it captures small objects that may fall down the drain, preventing them from blocking the plumbing system.

Retaining Nut

The Retaining Nut is a threaded nut that secures the flexible connector to the drain outlet, preventing it from coming loose under pressure.

It is typically made of brass or stainless steel, making it durable and resistant to corrosion. The retaining nut is an essential component of the bathtub’s plumbing system, ensuring that water flows through the drain without leaking.

Decorative Panel

The Decorative Panel is an optional component that enhances the aesthetic appeal of the bathtub and conceals any unsightly plumbing components.

It is typically made of materials such as acrylic or fiberglass, which are easy to install and maintain. The decorative panel comes in various colors and styles, allowing homeowners to choose one that complements their bathroom’s design.


The Lining is the inner surface of the bathtub that comes into contact with the water. It is typically made of materials such as porcelain, enamel, acrylic, or fiberglass, which are durable, stain-resistant, and easy to clean.

The lining is an essential component of the bathtub, preventing water from seeping through and causing damage to the structure.

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