Pool and Spa
Questions about Pool Repair? Ask an Expert Online.
All ozone units have a small check valve in the air tubing from the ozone unit to the mazzi injector some have two so the answer is yes. I would just replace the tubing and check valve for the ozone if you have a clog. Also the mazzi injector could be clogged at the top nipple where the ozone tubing goes on so be sure to blow out that as well. Here is a link to a good reference site for ozone.
Yes take a photo so I can see what you see but you may need to rip apart that area to access this line but a spa does not have to have ozone to operate why not look into a different system that you can use and not go through all this work?
You could look into using a UV light system or something.
Here is a link to one site.
Well if the air line is going into a pvc pipe then it most likely leads directly to the wall fitting where the ozone blows out you will need to access that side panel and dig through the foam to get at the back side of the fitting and most likely there is a check valve there. I see the tubing just after the flow switch and most likely that is not where the issue lies.
Well I am glad no matter what that you fixed the issue that is my main concern. I personally was unaware of the siphon loop. I hope that it works well for you now and I thank you for your time.