Recirulate Setting - What's It For / When To Use?

TRH

Member
Jun 28, 2011
17
2nd season with Intex Sand Filter and am wondering when, if ever the recirculate setting should be used?

When on that setting the water comes through the return with more pressure than when it's on Filter. I've never actually used or left the pump on that setting, but am wondering when or why I'd use it?

When adding shock or PH Plus maybe to get the chemicals through the system faster? But then why would anyone not want the water to go through the filtering media and any given time?