Ozone - Replacing Kynar Check Valves

[FirstContact]

Anyone else run ozone? What's your schedule for replacing kynar check valves? I'm at about 5 months no issues. I think Avast Marine recommends every month. Just seems a little excessive to me. Anyone know what the manufacturer recommends?

 

[jason2459]

I would try and setup the generator higher then the sump and not use a check valve.

 

[FirstContact]

I did that, but don't you still need the check valves before the reactor to guarantee the one way travel of air and ozone?

 

[jason2459]

I did that, but don't you still need the check valves before the reactor to guarantee the one way travel of air and ozone?

The pump will dictate that air flow. What are you using to control this? Skimmer or Reactor?

 

[FirstContact]

FWIW. I am using a reactor for ozone and a post reactor with carbon. I believe the check valves are beneficial.

Looking for those that use kynar check valves. How often do you swap them out????

 

[Randy Holmes-Farley Verified Community Expert]

When I used ozone I never used a check valve. As suggested, the pump and ozone generator were above water level and there's no concern about backward travel of air. What is the concern?

 

[FirstContact]

When I used ozone I never used a check valve. As suggested, the pump and ozone generator were above water level and there's no concern about backward travel of air. What is the concern?

Even though my set up is above the sump, I would get back siphoning of water past my Dwyer Air Meter when the flow of water is turned off for maintenance or when the Luft pump was dodgy. I replaced the Luft pump with something better. (It's plumbed to a manifold that is also below the reactors.) So, I find the check valves helpful and use them.

Just want to know if anyone out there uses them and how long before they replace them. More concerned with lifespan of the product.

 

[jason2459]

FWIW. I am using a reactor for ozone and a post reactor with carbon. I believe the check valves are beneficial.

Looking for those that use kynar check valves. How often do you swap them out????

What are you using for the controller?

I never used one so can't help answer that question.

 

[FirstContact]

What are you using for the controller?

I never used one so can't help answer that question.

Thanks Jason. I've read all of Randy's articles and have done plenty of research. Controller is a Vertex Cerebra. Works great.

Just reaching out if anyone knows the supposed lifespan of kynar check valves. Maybe I'll contact the manufacturer or US Plastics. I know ozone use has fallen out of favor and there probably aren't too many people out there that can answer this.

 

[jason2459]

PVDF Kynar should last many years. It's what my mazzei injectors are made out of for my skimmer.

So, it would be what ever is recommended for switching out a check valve in general. Which I've always set things up to avoid using them. I would look at why you're getting that surge or relocate the dwyer meter so the little surge doesn't mater.