Thanks in advance for any help you can provide. I own a 2000 Sundance Cameo with the SunZone CD Ozonator. I don't think it's working properly. When it was new, I could smell the ozone. Now that its a few years old, there is no distinct ozone smell. I called my customer service department, and they told me that if the icon on the display panel was lit-up that the ozonator was working properly, but the possible cause was those little tiny in-line check vavles could be blocked. Where can I find replacements of these things? Are they necessary? Anything else you can think? Thanks again.