I had our IG pool opened a week ago and after backflushing a few times and adding more water to clear up pool, i noticed the water level would be low constantly, so i figured i had a leak in the liner. i checked the liner thorougly and found no leaks. i was quite puzzled, finally last night i looked at the main drain pipe that sticks out of the hill side and noticed water flowing out of the pipe i have never had water come out before. I have always had pool closed by my pool installer and they have alway opened it as well. the pool has two mains in bottom and a skimmer with one port for suction and one that is blocked off, i am not sure how you turn on the main drain because i don not see a valve for it. i called the pool co this morning and explained this to them and they had ne shut off the suction for the skimmer and asked if that had helped it did not. they are going to send someone monday to look at pool. what would cause this? what can i do to shut off main drain?
I am attaching a pic of my pool