Why do I have a check valve here?

nickcasa75

Well-known member
Mar 18, 2023
45
orlando fl
Sorry for the obscure title. I bought the house a year ago here in Orlando FL. 7500 gallon pool with spa spill over and water fall feature. I have an IFCS as you can see from the pic, but I am unsure as to why there is a check valve on the plumbing leading to the IFCS. Perhaps it's to keep the spa from draining maybe???
 

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