Hot Tub Parts Explained – Understanding Your Spa Components


A hot tub is not just a relaxing addition to your home but a rejuvenating oasis that offers a blissful escape from the stresses of daily life.

It is a therapeutic haven where warm, bubbling water soothes tired muscles, and the gentle hydro-massage rejuvenates the mind and body.

From the durable shell that cradles the water, to the energy-efficient insulation that retains its warmth, hot tub parts serve a crucial purpose.

In this article, we will delve deeper into each of these vital components that make up a hot tub.

It’s exciting to explore the functions and features, and learn how they contribute to creating an inviting, relaxing, and revitalizing oasis right in the comfort of your own home.

Each element plays a crucial role in making your hot tub experience an indulgent journey of wellness and serenity.

It’s important to understand how each component works together to create an escape you can rely on when you need it…

And we’re going to share everything you need to know below!

hot tub parts

Ten Hot Tub Parts to Note

A hot tub is a relaxing and enjoyable way to unwind and soothe sore muscles.

Hot tubs have been designed in thoughtful ways with just the right parts to amplify your experience, whether it’s the quality of the shell, the precise mixture of water and air in the jets, or the efficiency of the heater.

Every hot tub part plays a crucial role that you simply wouldn’t want to go without.

To better understand the main components that make up your hot tub, read on!

1. The Shell

Out of all of the hot tub parts we’ll cover, this one is considered a primary component.

The hot tub’s shell is the outermost layer and is usually made of acrylic or fiberglass. It forms the basin where the water is held. Without it, you would have nowhere to soak!

The elements of the shell should be an important factor to consider if you’re in the market for a spa. Let’s take a closer look at what makes up a premium shell.


Hot tub shells are commonly made from two main materials: acrylic and fiberglass.

Acrylic shells are popular for their durability, glossy finish, and variety of colors available.

Fiberglass shells are also durable and offer a smooth, non-porous surface.


Hot tub shells are designed with molded seats and contoured surfaces to accommodate various seating positions, and ensure comfort for the users.

Some hot tubs also include loungers, or deeper seats for a more relaxing experience.


Hot tub shells come in various depths and sizes to accommodate different capacities; ranging from small models for two to three people, to larger ones that can hold eight or more adults.


The interior surface of the shell is designed to be smooth, non-abrasive, and non-porous. This makes it easier to clean and maintain, preventing the growth of algae and bacteria.

Colors & Patterns:

Manufacturers often pay close attention to the design and aesthetics of the shell.

Look at the different colors and patterns available, and make sure it suits your preferences and backyard aesthetic.


A well-constructed shell should be sturdy and long-lasting, and stand up to regular maintenance routines without adding to its wear and tear.

Proper cleaning and chemical balancing are essential to preserving the shell’s integrity and extending its lifespan.

2. The Insulation

This is one of the hot tub parts most overlooked, because it’s unseen.

To retain heat and increase energy efficiency, hot tubs have insulation between the shell and the cabinetry. This prevents heat loss and maintains the water temperature.

Hot tub insulation is a crucial aspect that significantly impacts the energy efficiency and performance of the hot tub.

It is important to note that insulation materials and methods can vary between different hot tub manufacturers.

For example, a Jacuzzi® Hot Tub’s insulation involves the use of two types of foam to ensure maximum heat retention and minimize energy consumption.

The insulation extends around the hot tub’s shell, helping to lock in the heat generated by the internal components and plumbing.

Additionally, the cabinet is also insulated, ensuring that the heat produced by inner components is retained within the hot tub, rather than dissipating into the surrounding environment.

3. The Cabinet

The cabinet surrounds the shell, and provides support for the entire structure.

It is commonly made of wood or synthetic materials, and adds aesthetic appeal to the hot tub.

The cabinet of a hot tub is a critical component that not only provides structural support, but also contributes to the overall durability, aesthetics, and energy efficiency of the hot tub.

Cabinetry is designed to withstand extreme weather conditions, as it plays a vital role in ensuring the hot tub remains energy efficient – in any climate, hot or cold.

4. The Pump & Jets

This dynamic duo needs one for the other, and vice versa, working together in harmony.

The Pump

The pump is responsible for circulating the water within the hot tub.

It draws water from the tub, passes it through the filtration and heating systems, and then returns the clean and heated water back to the basin.

Many hot tub manufacturers incorporate highly efficient pumps that are designed to transfer the heat generated by the motor back into the water.

The Jets

Jets are responsible for creating the soothing massage operation in a hot tub, and are strategically placed to target specific muscle groups.

The number and type of jets can vary depending on the hot tub model.

Some hot tubs are even equipped with adjustable jets, allowing you to truly customize your hydromassage experience.

5. The Heater

The heater is an integral component of your hot tub, responsible for maintaining the water at a comfortable and therapeutic temperature.

As the heart of the spa’s heating system, it ensures that the water remains warm and inviting for users to enjoy a relaxing and soothing soak.

Safety First

With safety as an ever-present priority, hot tub heaters are equipped with mechanisms to ensure maximum comfort while minimizing risk.

Temperature sensors and high-limit switches are installed, preventing the water of your hot tub from reaching dangerous levels.

6. The Filters

When considering hot tub parts, this one should not be overlooked.

The filtration system in a hot tub is a crucial component that plays a vital role in maintaining clean and clear water.

Unwanted Debris

The primary function of the hot tub’s filtration system is to capture and eliminate various types of debris that can accumulate in the water.

This includes leaves, twigs, insects, hair, and other particles that may enter the hot tub during use, or due to external factors.

However, the filtration system in a hot tub does far more than skim the water for floaties!

Unseen Bacteria

The filters work in conjunction with the sanitizer in your water, working together in the fight against unseen bacteria particles.

A well-maintained filtration system promotes better water hygiene and safety.

By removing contaminants, it helps prevent the growth of algae, bacteria, and other harmful microorganisms that can affect water quality and user health.

Multi-Stage Filtration

Many hot tubs incorporate multiple filtration stages to ensure a thorough cleaning.

These stages may include pre-filters, cartridge filters, or other filtration media designed to capture particles of various sizes, from large debris to fine particles.

By efficiently removing debris and impurities, the filtration system helps maintain the water’s clarity and quality.

Clean water not only enhances the visual appeal of the hot tub but also contributes to a more enjoyable and, most importantly, safe soaking experience.

7. The Control Panel

The control panel allows users to manage various settings of the hot tub, such as water temperature, jet intensity, lighting, and other features.

User-Friendly Interface

A well-designed control panel features a user-friendly interface, making it easy for anyone to operate the hot tub or swim spa.

Clear icons, labels, and a logical menu structure help users navigate through the settings effortlessly.

Customization Options

Control panels offer a wide range of customization options, enabling users to tailor their hydrotherapy sessions to their preferences.

You can adjust water temperature, jet intensity, and filtration schedules to create the ideal ambiance for relaxation and rejuvenation.

Temperature Control

With just a few taps on the control panel, you can set and regulate the water temperature to your desired level.

Whether you prefer a warm and soothing soak, or a cooler, refreshing experience–the control panel gives you precise control over the water temperature.

Jet Control and Massage Programs

On certain models, you can easily adjust the jet intensity on the control panel and even change the direction to target specific areas of your body, providing a personalized and invigorating hydro-massage experience.

Some control panels may even include pre-programmed massages that offer a sequence of jet patterns, further enhancing relaxation and stress relief.

Lighting, Music, and Water Features

Many hot tub control panels allow you to control LED lighting, music, and water features.

By doing so, you can effortlessly change the lighting colors, patterns, and brightness to create the perfect ambiance for your hydrotherapy session.

Additionally, you can control the water features included in your hot tub, such as cascading waterfalls or soothing fountains. This can add an extra touch of luxury and serenity to your soak.

Diagnostic and Maintenance Features

Advanced control panels may incorporate diagnostic and maintenance features, providing real-time information about the hot tub’s performance and water quality.

This allows you to monitor the status of various components, receive alerts if any issues arise, and access helpful maintenance reminders to keep your hot tub in top condition.

8. The Air Blower

*This is a model-specific feature.

Some hot tubs have an air blower, which injects air into the water to create bubbly, aerated water for a more invigorating experience.

In addition to the massage effect, the air blower introduces oxygen into the water, promoting aeration.

Aerated water can have several benefits, including improved water circulation, and the prevention of water stagnation.

9. The Cover

Hot tub covers are essential for maintaining water temperature, preventing debris from entering the tub, and ensuring safety when the hot tub is not in use.

A properly fitted hot tub cover also helps to maintain the water’s chemistry, and minimizes water evaporation.

Emphasizing the importance of a high-quality hot tub cover cannot be overstated.

With a high-quality cover, you can enjoy a variety of benefits, such as a longer lifespan, reduced maintenance, and superior energy-efficiency compared to cheaper, less durable alternatives.

10. Steps & Handrails

Often excluded from many lists of hot tub parts, steps and handrails should be considered as more than just accessories.

These provide easy access to the hot tub and improve safety for users when entering or exiting the spa.

With steps in place, users of all ages and physical abilities can access the hot tub more conveniently, and enjoy a relaxing soak without any difficulty.

hot tub parts

Hot Tub Parts Are Model-Specific

Like automobiles, hot tub parts are not universal, nor are they equipped on every spa on the market.

Remember that hot tub designs and features can vary across different models and manufacturers.

If you are looking for replacement hot tub parts, contact your local dealer first. Be ready with the make and model of your spa, and the year it was purchased.

Your Hot Tub Experts in Sarasota, Florida

Legacy Hot Tubs, Swim Spas & Saunas can help you with all things maintenance, including hot tub parts.

Our team of experts have a wealth of experience in this industry, and our professional technicians can perform inspections and complete component repairs.

We have a dedicated commitment to customer experience that we stand by, and are ready to assist with your hot tub care.

Visit our showroom, or call us today!


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