Hi I read these board quite often but have never posted. I am hoping someone can help with a leak I have in my pool.
It is a 38 x 16 inground Vinyl liner with one main drain. The pool looses about a 1/2 inch per day. Last year we had a diver come out and he could not locate the leak. After he dove he plugged the main drain and it continued to leak. We decided to have the Liner replaced since it was very faded and brittle.
The pool continued to loose water with the new liner. Over the winter I let the pool continue to loose water while covered untill it went past the light. at that point I had to fill the pool to make sure we did not damage the new liner. I am now assuming the the leak must be in the main drain.
I am going to swim down and plug the main drain tonight, my question is if I plug the Drain and the pool continues to leak can I be reasonably certain that it is not the Main and something in the shell?