I'm new to in-ground pool ownership, I'm not sure what this connection is used for. It appears to be sealed off with some rubber membrane material. I took off the cover ring but the rubber membrane material appears to be sealed and doesn't come off.
Any idea what this is supposed to be used for? Thanks in advance.
[attachment=1:sm1j4f69]1.jpg[/attachment:sm1j4f69]
[attachment=0:sm1j4f69]2.jpg[/attachment:sm1j4f69]
Any idea what this is supposed to be used for? Thanks in advance.
[attachment=1:sm1j4f69]1.jpg[/attachment:sm1j4f69]
[attachment=0:sm1j4f69]2.jpg[/attachment:sm1j4f69]