Leak in newly installed liner

[selectstar]

I have a leak, about 1" every 24 hrs. I had a similar leak in my old liner but not as prevalent.

Here are the steps I have gone through at least twice.
-Isolated ALL plumbing with PVC screw plugs, even the main drain with the Oatey screw-in pressure test plugs. Leaks the same with equipment running and/or isolated. (Gotta be liner, right?)
-Dye tested niche 4 times, stairs four times (found two small leaks, torque'd the screws til they stopped)
-Dye tested skimmers and returns (small leak in skimmer, torque'd the screws til it stopped)
-Completely removed the Hydrostatic valve and replaced with a teflon taped PVC plug.

I am reasonably confident that all gasket openings are water tight. I did not install the liner. I had a company install. They have returned multiple times only to find nothing.

I am at a loss on what to do next. The pool is 8-9 year old, solid conc floor and steel walled.

Any suggestions?
Thanks

[FormerBromineUser]

You found leaks and the PB couldn't? Yikes. Sorry I can't help besides the old trick of letting the water level lower and until it stops leaking (as long as it doesn't get TOO low! That at least narrows your search. I am rooting for you!

[Anonymous [GDPR] European in the UK]

Call a team with a Leak Trac, they will find most leaks in minutes. If there are liner leaks give their report to the liner fitters.

[Phillbo]

and have them cover the cost of finding the leak.