Help locating waste line

[trtodd]

I have a pretty good understanding on the equipment outside of where my dadgum waste line is. HELP

 

[borjis]

well it should be one of the two going out of the filter that is not the one coming from the pump.

What model multiport valve is that? google for a schematic of it and it will say which of those lines is waste.

 

[trtodd]

That makes sense. Next question, it's the right line in the 3rd picture. It has that cap but also goes back into the ground. Do I need to locate where it goes under ground or can I remove that cap to help drain my pool for closing

 

[JVTrain]

Looks like it is capped for winterization or another reason and that you can join it up with an extended waste line that goes back underground, possibly into a sewer connection. That splice in there would allow you to either hook up a hose at the cap and backwash where you wanted to direct the water or connect to the other pipe to the right that goes... somewhere else. Into a sewer connection is my best guess.

 

[trtodd]

Interesting, thank you so much. I think the safe play is to open that cap and run a hose. No idea where it goes back in ground.

The other pipe to the far right is dead and needs to be removed completely. It was hooked up to a spa that's no longer here.