I am a pool newbie - we have a 18K gallon pool with one skimmer and a drain in the deep end.
I've been struggling with the 6 year old SWG, but that's another post. I have two pipes coming out of the ground, combining into one and then into the pump. One of these pumps has a valve on it. Can someone tell me if my assumptions are correct:
The pipe on the left is the skimmer. The right is the drain in the deep end. In this configuration, both should be open, and this is how the valve should be, almost always:
In this configuration, skimmer is open and main drain is off. This is only ever used when vacuuming the pool:
I ask because I'm not seeing any dirt get sucked into the main drain in either configuration - but it may just be my imagination. Is there any way to definitively know whether my main drain is working or clogged? It's obvious the skimmer is working as I can see water getting sucked down the skimmer hole readily.
Thanks for any help!