- Do pool filters have a minimum pressure rating?
Now here’s your hosts – Matt and Rob.
For optimal performance, I was advised that I should run my variable speed pump at a flow rate high enough to maintain 15 PSI at the DE filter. Do you agree with this advice?
-From Inyo’s Forum
No, we do not agree with his advice. The manufacturer doesn’t list a minimum flow rate or PSI rating, reason being the filters work better with a lower flow rate. On the other hand, if the flow rate is too high, debris could bypass the filter or damage the filter.
If you want to go with an analogy, which I always like to do, you could bring it back to I Love Lucy. Remember the conveyor belt with the chocolates? Well, it was working fine when it was going nice and slow; maybe that is 15 to 20 gallons a minute for your filter.
Everything is working fine, and your filter is feeling great. But then you chuck it up to 50 or 80 gallons per minute, and things just started going haywire. The filter doesn’t have enough time to pick the dirt and it can damage the filter media because pressure is way too high.
But there are times when you do have to kick the flow rate up a little bit. That’s when you are going to backwash or recharge the DE filter. Or, if you vacuum or have to run water features, like a bubbler or waterfall, something like that.
Thank you for joining us and if you have any questions, feel to explore our Inyo forum or our blog. Thank you for joining us. Bye.