Spa & Hot Tub Ozone Problems
One of the most powerful and widely used spa products is ozone. It's capable of generating 200 times more powerful chlorine.

The ozone generator is located under the spa cabinet, and it's produced by a small hose that's connected to an injector fitting. The output of the generator decreases over time, so it's time to replace or renovate this component.


Is My Spa Ozonator Working?

When used properly, ozone can kill bacteria and other pollutants in the water. However, it can also cause issues if it's not working.

- Fine bubbles in the tub, from the ozone line, a steady stream of fine 'champagne bubbles' entering the spa.

- Spa ozonators have a power indicator light, which may mean that ozone is being produced.

- When you lift the spa cover, you may be able to briefly smell ozone that has gassed-off.

- If you remove the ozone hose from the check valve, you should be able to smell the ozone.

- Water quality deteriorates when ozone is no longer being produced, requiring more chemicals.

- Is your unit past its prime? Ozonators all lose effectiveness and fail after a few years.

- UV ozone bulbs last about 2-3 years, less if cycled on/off frequently

- Del MCD-50 CD chips last 3-5 years, Del CDS Spa Eclipse models last 2-3 years


Clogged Ozone Injector

A Mazzei Ozone Injector is a device that draws in ozone gas and mixes it with water. This procedure begins immediately.

The check valve on an injector is designed to prevent water from exiting the vehicle. If the water gets out of the cap or the ozone hose, this indicates that the check valve is not working.

If an ozone injector is clogged, it will block the small amount of gas that it produces. To clean the hose, remove the injector and use a small screwdriver to dislodge anything that's stuck.


Broken Ozone Check Valve

A second check valve is commonly used on spa ozone systems to prevent water backing up through the hose and into the ozone unit. This component is installed between the injector manifold and the ozonator.

Over time, the check valves can become stuck or blocked by the build-up of gunk or scale. This issue can also happen with other components of the ozone system.

You can remove deposits from a check valve with vinegar, but make sure that the one-way system is still working properly. You should also be able to blow air through it.


Damaged Ozone Tubing

The tubing that carries the ozone from the oximeter to the injection manifold will eventually deteriorate. It can become yellowed and brittle from the chemicals in the air.

Del Monte advises that you check your ozone hose every year for signs of wear and damage. Also, make sure that the barbed connections are secure.


Expired Spa Ozonator

The ozone generator itself is also an issue that can be solved with a proper replacement. There are two main types of spa ozonators: UV and CD.

When used for ozone production, a new UV bulb should be replaced after a certain number of hours. Although most UV ozone machines still work, they no longer produce the wavelengths required to effectively produce ozone.

CD or corona discharge ozonators generally require a new chip or electrode each 3-5 years to maintain their ozone output.

Newer spa ozonators by Del are now so long-lasting and affordable that they are replaced entirely.


Spa Ozonator Maintenance

Having the necessary parts on hand is important to keep a spa ozonator running smoothly. This is done by replacing the parts that are worn out, which can cause damage to the system.

We have a variety of spa ozonators and parts to keep your spa equipment running smoothly. It is important that you maintain your spa ozonator to avoid experiencing any issues.


If you have any other questions about pool and spa products please do let us know - we are here to help!


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