I have a new customer, a Health Club, which is having water leaking into the pool from underneath.
It is a 20 x 40 x 5 deep. They use Bromine to Sanitize. It used to be a gunite pool, which had a liner installed over it about 5-6 years ago. As I understand the liner installation process, all that is done is to spray wash the surface, place a layer of felt against the walls, apply adhesive, and the drop the liner.
Each main drain has a hydrostatic valve in the sump. There is also a 1.5" pipe in the center of the pool, which is plugged with a Hayward 1022C. I was told this was used to realse pressure when the pool is drained. The customer drained the pool and had the liner checked for leaks by the liner company since there was water underneath the liner. They found no leaks.
While they had the pool empty, they had the ceiling cleaned. While the pool was empty, water began to seep into the pool, both under the liner and on top of the liner. It seems as though it is coming from the center pipe. I can see fissures in the gunite at the pipe ring.
Prior to draining the pool they did have a cloudy water problem. The TDS was high and they were unable to maintain a bromine level. All other levels were acceptable and within range.
Any ideas as to what is going on? I am stumped.