Just dug up my plumbing around my concrete inground pool and spa to find source of water leak. Appears that there are 3 water jets in the adjacent inground spa that have a common water feed, and also a common feed for air. Both are PVC. I dug deep to find a small river of water coming thru dirt adjacent to one of the jets. The plumbing disappears into what appears to be a fairly thick pool wall. I cannot see the fitting that both the air and water lines attach to the jet to try a repair. The leak does not occur when the jets are sucking air, but only after the jets stop or pump is turned off. I think water then moves back up thru the jet air hole and leaks. Is there any way to seal a short length of pvc when you have access to both ends (the hole in the jet inside the spa and the other end of the pvc sticking out of the concrete pool wall & dirt), but no access to anything in between? I can probably disable the air to this jet by plugging up the air hole in the jet and cutting off the pvc line and capping it, but would like to keep air to this jet if possible. Is there a liquid or some other product that I can pour into the PVC pipe that might work??
Thanks for any thoughts about this.