Hoping someone can advise before I rent a bulldozer. i noticed my water level of my inground pool was low. when i checked my supply line, i noticed there was no water in it. I checked the anti-syphon and there is no water coming up into that. My problem is there is no (known) valve that controls this supply; it simply pushes water from (i'm assuming) my house or from the street. I don't detect any water in the house, or around the house or wet ground, etc. seems extremely odd that the supply would just stop working. there has been no construction around my house. I am new to pool-living, so i'm hoping someone smarter than myself can help solve this.