|In this photo is one of the most popular
ozone generators in the USA for reliability and
However, we have found that people don't understand how
ozone generators work with spas and as a result they often
don't understand some
simple concepts on ozone function in spas.
1/ Ozone generators found in most spas do not pump ozone,
rather the ozone is drawn in by a vacuum created in the spa.
- This vacuum is either created by an "ozone jet" or an
"ozone venturi injector"
- Ozone is a gas created when the air is drawn into the
ozone chamber and converted to ozone.
- Ozone is O3 which
is a natural oxidizer containing 3 atoms of
oxygen. It helps with most any type of sanitizer
to remove bacteria, and organic waste; to purify the
- A simple test to see if the suction is working it to
have the pump running and the tubing open, listen and
hear the suction. Then put a drop of water on the hose
and if it is drawn in there is enough suction.
2/ Many people do not realize when the bubbles stop in
the water, is not the ozone generator but rather it is in
the spas ability to cause the vacuum, and if you hook up
the ozone generator, turn it on and don't have air
movement you can shorten the life of the ozone generator,
as well has have no ozone in your spa.
- If the ozone is not making bubbles it normally has
nothing to do with the JED 103 that we offer.
- You need to find out why the bubbles have stopped
3/ It is always a simple problem when the bubbles
- It can be that the ozone jet or injector has debris in
it or is calcified.
- An ozone jet or injector can be easily blocked by
calcium that is precipitated from the water. If,
for example, you use any of the liquid pH balancers that
remove calcium from the water, often times it will drop
out calcium on jets and injectors to block them.
(This is why we don't recommend the or sell them. In our
opinion these balancers are bad for equipment, from
doing service for over 20 years.)
- For ozone jets you may have to remove it or stop using
liquid pH balancers and use pH Haven from the shopping cart.
Then start using "Defender" in higher doses to see if
you can dissolve the calcium and get the bubbles going
again. If not find a service company to come and
fix the ozone jet. If you have 3/4 inch tubing going to
the ozone jet you can cut the tubing and install an
injector in line and follow the instructions. Be
sure to block the old ozone tubing.
- For ozone injectors, you can replace it or take it out
and soak it in white vinegar over night and then look to
see if the calcium is gone. See the replacement ozone
- Last, but not least, if you install the ozone check
valve backwards it will stop all ozone bubbles because
it is a one way valve designed to block in one direction
and allow in the other. There is an indicator of
the direction on the body of the valve. It needs
to have the arrow or "VAC" in the direction towards the
injector or jet. You can blow through it and see
how it works. In one direction the air passes and the
other you can't get air to go through it. The body
of the valve looks like an arrow and the letters VAC
should point toward the hot tub and away from the ozone
4/ Remember that ozone generators have a limited life of
2 to 5 years depending on the condition they are used
in. They are like a light bulb in that respect once
they stop emitting ozone then they need to be
replaced. You can have bubbles but NO ozone in
the air entering the spa.
- If you do not smell any ozone (a sweet smell similar
to after an electric storm or lightening in the air),
then take a look inside. Normally you can unplug
the ozone first then open it with a screwdriver and see
a burned cartridge that is literally burned out.
Only do this if you feel at ease around electrical
- Take the tubing and blow into the ozone generator's
hole and smell the blue tubing for ozone. It's a
bit awkward but it works to test it. BACK