My spa is not ozone ready, I want to install one

Posted by on 5/18/2023 to Chemical

A comprehensive guide to installing an ozone system in your non-ozone-ready Spa:

If your spa has more then one air control, you'll want to "tie" into the one that produces the most air when it is opened. With the pump running on low speed, turn off both air controls, open one at a time observing the air mixture that is coming out of the jets. The air control that allows the most air to mix with the water coming out of the lowest jet; if possible, is the one you will want to plumb into.

If you have more than one air Venturi line, select the one with the best suction, connected to the lowest spa jet if possible (see plumbing requirements above).
Cut the PVC pipe (usually 1") and install a tee, in the side port of the tee you'll need to install a barbed fitting (found at any Home Center) that will except the 3/8" tubing included in the ozone kit. (Fig 2).
Connect a 6" piece of tubing to the barbed fitting, at the other end install the provided check valve. Once this is done, blow into the check valve, the air should flow freely towards the tee, if you feel back pressure when doing this, you have the check valve installed backwards.
Attach a 5-6 foot length of flexible tubing to the check valve and route the hose so that at some point it passes above the water level of the spa. You may need to tie the hose up to keep it in place. This will help insure that no water backs up into the ozonator (Fig 2).
Before attaching it to the ozonator you should test the line to make sure that it will have an adequate amount of suction to draw in the ozone from the generator as well as making sure water does not back up into the line. You'll need to fill the spa up with water, shut the air control valve off, and start the low speed pump. You should see bubbles mixing with one or more jets. Placing your thumb over the tube should make them disappear. If this is the case, then you have successfully installed the plumbing.
Connect the final end of tubing to the ozonator barb and plug in the ozonator.
Systems are either 120 or 220 VAC, 50/60 HZ. For hard wire installation wire ozone generator systems to the low speed side of the circulation pump switch or timer. Follow your local electrical code for grounding and installation procedures for spa equipment.
FINAL NOTE: The mentioned tee can be installed vertically (as shown) or horizontally anywhere in the air control line. However, the closer to a jet you can get the better.

Systems are either 120 or 220 VAC, 50/60 HZ. Wire ozone generator systems to the low speed side of the circulation pump switch or timer. Follow your local electrical code for grounding and installation procedures for spa equipment.

You will need to purchase an ozone injector for this installation. You'll also need to determine weather the line you are installing the injector in is 1.5" or 2".
The injector is installed after the filter/heater make sure that the "flow" arrow is pointing towards the spa.
Connect a 6" piece of tubing to the barbed fitting, at the other end install the provided check valve. Once this is done, blow into the check valve, the air should flow freely towards the injector, if you feel back pressure when doing this, you have it check valve installed backwards.
Once this is done push the provided tubing onto the injector barb. Before attaching it to the ozonator you should test the line to make sure that it will have an adequate amount of suction to draw in the ozone from the generator as well as making sure water does not back up into the line. You'll need to fill the spa up with water, and start the low speed pump. Once this is done you should see bubbles mixing with one or more jets. Placing your thumb over the tube should make them disappear. If this is the case, then you have successfully installed the plumbing.
Connect the final end of tubing to the ozonator barb and plug in the ozonator.