Complete Spa, Hot Tub, and Jacuzzi Glossary

Acrylic Shell

The smooth, durable surface inside a hot tub or spa, typically made of acrylic, which forms the tub’s seating and basin area.

Air Blower

A component that blows air into the water, creating bubbles for added relaxation and hydrotherapy benefits.

Alkalinity

A measure of water’s ability to neutralise acids, crucial for maintaining balanced water chemistry in spas and hot tubs. Proper alkalinity helps prevent corrosion and scaling.

Aromatherapy

The use of essential oils or scented products in hot tubs or spas to enhance the relaxation experience.

Bather Load

The number of people using a spa or hot tub at one time, which can affect water quality and chemical balance.

Biofilm

A layer of bacteria that can form inside the plumbing of hot tubs or spas. Regular cleaning and chemical treatments are necessary to prevent biofilm buildup.

Blower

A motor-driven fan that injects air into the spa’s jets or directly into the water, creating bubbles for additional massage effects.

Cabinet

The exterior structure that houses the equipment and components of a hot tub or spa, usually made of wood or synthetic materials.

Calcium Hardness

The amount of dissolved calcium in the water, which affects the water’s softness or hardness. Proper calcium hardness levels prevent damage to the spa’s surfaces and components.

Cartridge Filter

A cylindrical filter used to trap dirt, debris, and contaminants from the water as part of the filtration system.

Chemical Feeder

A device that automatically dispenses chemicals like chlorine or bromine into the spa water to maintain proper sanitation.

Chlorine

A commonly used chemical for sanitising hot tubs and spas. It kills bacteria and keeps water safe for users.

Circulation Pump

A pump that continuously circulates water through the filter and heating system, helping to maintain water cleanliness and temperature.

Cover Lifter

A device used to easily lift and remove the spa cover, which also helps prolong the life of the cover by reducing wear and tear.

Cover

The insulated top that covers the hot tub or spa, keeping heat in and debris out. It also serves as a safety feature.

Drainage

The process of removing water from the spa or hot tub. Draining is necessary for cleaning and maintenance.

Filter

A key component in a hot tub or spa’s system that removes impurities, debris, and contaminants from the water to keep it clean.

Floating Dispenser

A device that floats in the water and gradually releases chemicals like chlorine or bromine.

GFCI (Ground Fault Circuit Interrupter)

An electrical safety device that shuts off the electrical circuit in case of an imbalance, protecting users from electric shocks in wet environments.

Heater Element

The part of the hot tub that heats the water to the desired temperature, typically located inside the control box.

Hot Tub

A large tub or small pool filled with heated water, used for relaxation, hydrotherapy, and socialising.

Hydrotherapy

The use of water for pain relief and therapy. In spas and hot tubs, hydrotherapy jets target muscle tension and improve circulation.

Jacuzzi

A popular brand name that has become synonymous with hot tubs and whirlpool baths, known for water jets that provide therapeutic massage.

Jet

Nozzles in a spa or hot tub that release streams of water or air for massaging effects. They come in various types for different hydrotherapy experiences.

LED Lighting

Energy-efficient lighting used inside spas and hot tubs to create ambiance, often colour-changing for mood enhancement.

Locking Cover

A safety feature designed to secure the spa cover, preventing unauthorised access and keeping children safe.

Ozonator

A device that produces ozone gas, which is injected into the spa water to help sanitise and reduce the need for chemicals like chlorine or bromine.

PH Level

A measure of how acidic or alkaline the water is. Maintaining a proper pH level is essential for comfort and the longevity of the hot tub components.

Plumbing Manifold

A part of the spa’s plumbing system that distributes water evenly to the jets.

Pump

The motor that circulates water through the filtration and heating systems in a spa or hot tub.

Relocation Service

A professional service that helps move spas or hot tubs from one location to another, ensuring the equipment is handled and reinstalled properly.

Scale

A build-up of calcium or other minerals that can form on the spa surface or equipment if the water chemistry is not properly balanced.

Sanitiser

A chemical used to kill bacteria and other harmful microorganisms in the water. Common sanitizers include chlorine, bromine, and saltwater systems.

Shock Treatment

A method of adding extra sanitiser to the water to kill bacteria and break down organic contaminants. It’s often done after heavy usage or after draining and refilling.

Skimmer

A device located near the water’s surface that removes floating debris before it can clog the filter or affect the water quality.

Spa

A broad term that includes any hot tub or pool designed for relaxation or hydrotherapy. Also refers to facilities offering health treatments.

Spa Pad

A sturdy, level surface on which the hot tub or spa is installed. It can be made from concrete, gravel, or synthetic materials.

Submersible Pump

A portable pump used to drain the water from a hot tub or spa when it’s time to clean or move the unit.

Thermal Blanket

A floating cover that helps retain heat in a hot tub or spa, reducing energy consumption.

Vinyl Liner

A waterproof layer that lines the inside of some hot tubs or spas, particularly inflatable models.

Water Care Kit

A set of chemicals and testing tools used to maintain proper water balance, including pH adjusters, sanitizers, and test strips.

Waterfall Feature

A decorative addition to a spa or hot tub, allowing water to cascade over the edges, creating a soothing sound and visual effect.

Whirlpool

A spa or hot tub with jets that circulate water, providing a relaxing massage experience. Often used interchangeably with “jacuzzi.”

Winterising

The process of preparing a spa or hot tub for winter, including draining the water, adding antifreeze, and covering it to protect from freezing temperatures.

UV Sanitiser

A system that uses ultraviolet light to kill bacteria and other microorganisms in the water, reducing the need for chemical sanitisers.

Warranty

A manufacturer’s guarantee that covers certain repairs or replacements for the hot tub or spa components over a specified period.

Wet Test

A test conducted by running water through the spa or hot tub before purchasing to ensure all systems work properly and to experience the jets firsthand.