Grow Mediums Autopot Copper disk, up, down, in tray, in pot...Im confused!!!! :-)

[Gone Camping]

The half moon of the valve sits over that T part, you have to give it a goodly lil push down so it snugs in....think it keeps the bottom of the valve off the bottom of the tray so the liquid can flow out when it activates..

Thank You.. it didnt seem like it wanted to insert into the half moon, and i did not want to try harder till i asked.