Terms to Know If You Are Shopping For a Hot Tub

Denver hot tubs

Are you in the process of buying a hot tub? Then you must be confused by the many terms you see in product descriptions and specifications. Don’t worry, very soon you will master them and you will become a savvy buyer.

In this article, we will explain to you the meaning of the most important terms you will find in descriptions for Denver hot tubs. These terms will make you evaluate the quality and key features of a hot tub. Also, they will help you take care of your tub and understand the explanations of maintenance engineers after an inspection.

Thus, without further introductions, these are the terms you need to know if you are shopping for a hot tub, in alphabetical order:

Air Switch

This pneumatic-mechanical device is critical for the safe operation of the hot tub. It allows you to control the functions of the tub (turn the pump on and off) without having a live electrical circuit in the close proximity of the tub.

As you know, you must never operate electric devices in or near water, because you would be electrocuted otherwise. Thus, you should always notify the maintenance engineer as soon as you find out that the air switch does not work properly.


Bromine is a sanitizing substance, similar to chlorine. You will get clear instructions about how much bromine you should add to the water in the hot tub in the user manual. For your safety, make sure you follow these instructions.


The filter is a piece of porous material (similar to a sponge) that is placed inside the cylinder element of the hot tub. Its role is to retain any particles and debris and maintain the hot tub water clear. The filter is a consumable part – you will have to keep buying filters and replacing them at regular intervals.

Flow Rate

This is a unit of measure that describes how many gallons per minute pass through the hot tub pump. A higher flow rate means that the hot tub will fill up faster.

Main Drain

Just like in a regular bath tub, the main drain allows water to run out of the hot tub. It is usually placed at the lowest point of the tub shell and you should take care to keep it clean and free from debris and obstructions.


This is a device that injects ozone into the hot tub water in order to disinfect it. An ozonator will destroy most types of bacteria, mold and other organic materials in the water or on the hot tub walls.

pH (Potential Hydrogen)

This is a scale that defines how acidic or alkaline water is. Neutral pH has the value 7.0. The ideal value for hot tub water is between 7.2 and 7.6 – that is, slightly alkaline.


The skimmer is a part of the circulation system of a hot tub. Its role is to remove debris, like fallen leaves or insects, from the surface of the water. Just like the filter, it is a consumable part that you need to replace over time.


Also known as shock treatment, this is a process that involves adding a high level of chlorine to completely sanitize a hot tub in case of serious contamination. It is used for rare cases when regular chlorination does not destroy the unwanted elements.