Pressure testing a dry pool

It may have been full and smelled like a black swamp. I could see the realtor having it drained before the house went on the market and the wind billowing the brittle liner has since damaged the liner.
 
Cement base just means the base, not the walls or whatever joint is between the walls and the base. (Cement is also not always concrete, sometime vermiculite, and there’s likely no rebar in the floor so cracks are almost a certainty)
Concrete is also not waterproof. If the liner has been ripped for a while, there’s plenty of time to saturate the surrounding soil. It’s for sure potentially very damaging to the surrounding area.
The surrounding area drains really well. But there was also no damage to the nearby patio, pool deck, or basement.

Another comment suggested they drained the pool and put holes in the liner to keep the pool from filling up. This would line up with the fact that the pipes were winterized.

All in all quite the mystery.
 
Another comment suggested they drained the pool and put holes in the liner to keep the pool from filling up.
if so, it was a very bad idea. If it was holding water, it should not have been drained if they planned on keeping the integrity of the pool structure and surrounding area.
 
If it was holding water, it should not have been drained if they planned on keeping the integrity of the pool structure and surrounding area.
The list of stupid things that people do to their pools is a mile long. This will not be the last entry. (If it's what happened) :ROFLMAO:
 
There is only conjecture on why it is empty.

Other than looking at what is under the liner and checking for signs there might be settling under the concrete there is not much to be done. As others have said nothing else looks like it was not taken care of and the lines were winterized. The only other thing to looks at is the liner track, being that the liner looks like its not falling out anywhere it's likely fine too.
 
What else would you do it with?
Water.

The typical water pressure in a home faucet and garden hose, measured in pounds per square inch (PSI), generally ranges from 40 to 80 PSI. You can control it down to 15 by using a valve and only pressurizing partially.

See pages starting at page 39 of this presentation on the "why"...Link-->
If the pool is drained, this may not be an option. If you use air, be VERY mindful of the plugs, with air, they can come out like a bullet and can be dangerous.
 
Ok, just an update for everyone.

The inspector came out today and we tore up the liner a bit more to look at the concrete. There is some minor damage which will need a bit of concrete to smooth out. However, there didn’t appear to be any structural issues.

He said everything indicated this person drained the pool and covered it for some reason. He mentioned the timing couldn’t be better and recommend we act quickly to get it repaired after we close.

He mentioned the install will not be too much more than a typical liner install.

It seems we got very lucky!
 

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