Hayward CL220 Testing


Well-known member
Jun 3, 2010
Jacksonville, FL
Hi All. I'm new here and have a question about the Hayward CL220. I noticed a few days ago that one of the lines had come lose from the compression fitting. So I reattached it, but now my CYA reads 0 (with a test strip).

My question is: How do I test the feeder to make sure that it is still working properly. I have it full of tablets.




TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
Silver Spring, MD
Welcome to TFP!

The only way to be really sure the chlorinator is working is to wait and see if the tablets are dissolving.

I wouldn't trust test strips, especially for CYA, which they are particularly bad at.