Water in tube that goes down below pool?

[Itsmejson]

I’m we’ve had a bunch of rain here in TX and I remember our pool builder saying they installed a tube to view if there is water u see Fiberglass shell. Does anyone know what this is called?

I looked down it tonight after I got home from work and there is water that has collected at the bottom. Not sure if this should be a cause for concern?

 

[PoolStored]

It is a sump pit. You put a sump down there to get the water table to lower.

 

[Itsmejson]

It is a sump pit. You put a sump down there to get the water table to lower.

Ty. At what point should this be a concern when water collects at the bottom?

 

[PoolStored]

Ty. At what point should this be a concern when water collects at the bottom?

I don't know. Maybe @Texas Splash (who has a FG pool and in TX) or @ajw22 know.

 

[Texas Splash]

I'm not sure there's a hard & fast rule of how high is acceptable. As a tool, it lets you know the water table is rising and could be exerting pressure to the shell (upward) from underneath. Generally, as long as the pool is 100% full it should be okay, but you might speak to your builder to see if they have a recommendation of when you should be concerned and if there is anything else you can/should do other than pump water out from below with a sump pump as PoolStored indicated.