Hot tubs as you may well know come in a variety of sizes, shapes, colors and vary in the many features.

1. How Do Hot Tubs Work?
Hot tubs as you may well know come in a variety of sizes, shapes, colors and vary in the
many features. The earliest form of a hot tub was simply a pump you place in your bath
tub for hydrotherapy. As hot tubs have change into what you see today it’s taken less than
sixty years.
Basic hot tub designs as we know them today run on centrifugal pumps which are usually
used for moving liquids through a system of pipes. The pump is a motor anywhere
between .5 horsepower to 2 or more. The motor spins the drive shaft which is attached to
turbine impeller that is
inside a water tight
chamber.
As the impeller spins it
pulls water from the hot
tub, in some designs
through a filter first to
keep any compounds
from clogging the other
internal working parts.
After passing through the
suction filter which two
ways as a water skimmer,
it is sucked into the pump
as kinetic energy when it
Basic Hot Tub Schematic hits the turbine it is
shot out of the pump as potential energy at a higher pressure.
After exiting the pump it heads to the heating element that is usually designed with some
wound metal inside a container known all together as an electrical resistance heater. The
metal inside is heated according to the thermostat and as water passes through and is
pushed against the metal is heated and pushed back out the other side.
On most Dreammaker hot tubs the heating element has two settings high, and low which
allow for them to save power, they call this a “hybrid hot tub”. After exiting the heating
element the water is pushed on to a division of tubes where it is distributed to any number
of jets, however before entering back into the tub the water will enter a Venturi air
injector which is a small piece of plastic tubing that looks like a T.

2. The water will pass straight
through a narrowing in the tubing
that will increase the water
pressure, as it passes over the other
tube, the air inlet which draws air
from the motor and heating
compartment, it creates a vacuum,
Venturi Air Injector sucking the warm air into the water
with it. Usually users can control
the air water mixture with a lever on the top level.
The reason the air is taken from within the hot tub enclosure is to try and use the heat, if
the air intake was coming from outside then the cooler air would then cool the water, not
making for a very efficient effect. The air water mixture creates for a more robust
experience with the hot tub jets.
Different designs as far as the order and number of things may vary. For instance the
filter may not be located till after the water pump, known as a pressure filter, then the
water skimmer will be located separately on the top. Many larger models of hot tubs have
multiple pumps to help send water to and increased number of jets.