Moved from this old 2014 thread... In line check valve?
Just came across this when looking at the check valve info and now I finally understand why they would have plumbed my skimmer and drain together. Thanks!
Yes, it could, but would partly depend on your plumbing setup, if you have a skimmer only or main drain plumbed through the skimmer as a vacuum break then it would stop loosing water when the skimmer ran dry, instead of the height / depth of the return fittings or ground level which ever is higher.
Just came across this when looking at the check valve info and now I finally understand why they would have plumbed my skimmer and drain together. Thanks!