Hi I am a new pool owner. I just redid my pool plumbing this year (see attached) and was wondering whether I need to add a ball valve for my return line. (Do I need one)
I only question this now because I am looking into closing my pool for the first time and was wondering whether or not I need to trap air in the return lines when blowing out the system. The only way I can see this happening is if I am able to close the valve once the air is blowing out the lines. (is this a correct assumption)
I was under the assumption that once I have air blowing through the plumbing I close the valve after I plug the plumbing holes. For example once air shoots out the skimmers I plug up then close the skimmer valve, then once air comes out main drawin I close main Drain valve.
Let me know your thoughts