Everyone is stumped about our significant water loss

[bakerpoolgal]

In ground pool with liner.

We got our filter replaced and pool looked great.

Then we noticed we were losing a lot of water daily. We lose an inch every 3 hours.

We plugged the pool (jets and skimmer) and turned pool off for 24 hours and didn’t lose any water so ruled out liner.

We had someone come test the pipes and try to find a leak in the plumbing and found nothing.

There is no visible water anywhere on our property. All the equipment is functional and dry. We don’t have pool lights or bottom drain.

We plugged each jet one at a time and lost water that way too.

Any thoughts on what it could be or what else we should check?

Help!

 

[needsajet]

Do you have a plumbed backwash line? (pipe going from the backwash outlet on the filter to a drain). If so, a faulty spider gasket in a multi-port valve could do this.

 

[TinFoilHat]

It might be leaking from around one of the ports of the pool between the liner and the hard side of the pool. That would need to be tested with drops of food coloring around each one with them plugged and watching for the coloring to be drawn toward the port.

 

[bakerpoolgal]

Do you have a plumbed backwash line? (pipe going from the backwash outlet on the filter to a drain). If so, a faulty spider gasket in a multi-port valve could do this.

That was our issue with the previous filter but not with this one

 

[bakerpoolgal]

It might be leaking from around one of the ports of the pool between the liner and the hard side of the pool. That would need to be tested with drops of food coloring around each one with them plugged and watching for the coloring to be drawn toward the port.

We are trying that tonight, fingers crossed

 

[Lake Placid]

It might be leaking from around one of the ports of the pool between the liner and the hard side of the pool. That would need to be tested with drops of food coloring around each one with them plugged and watching for the coloring to be drawn toward the

We plugged the pool (jets and skimmer) and turned pool off for 24 hours and didn’t lose any water so ruled out liner.

Liner test should have ruled this out. How was the plumbing tested? Was it pressurized and held? For how long?

 

[bakerpoolgal]

Liner test should have ruled this out. How was the plumbing tested? Was it pressurized and held? For how long?

We are redoing liner test tomorrow.

They also want us to let the water go under the skimmer to see if leak stops to rule out skimmer leak

Yes plumbing was pressurized. He did it twice

Dye test around the jets didn’t provide any leak detection

 

[bakerpoolgal]

the sand/ground under the filter is a bit wet, not a lot but it’s something we noticed.

Because of timing, is it possible something could go wrong when installing new filter?