1967,
View attachment 134252
Pipes # 1, 2 and 3 are all wide open with the two valves set as they are. There is no way for us to know which pipe goes where for sure, but my guess would be that #1 goes to the vacuum port, # 2 goes to your Skimmer, and # 3 is your main drain. You will need to determine which pipe goes where.. I would first determine which pipe goes to the skimmer.. Go to your skimmer and remove the basket.. See if you can feel suction at the pipe at the bottom.. Go to the two valves in front of the pump and turn them one at a time and see what happens.. Makes sure the pump does not run out of water.. One of those valves will shut off the input from the skimmer., one of the valves will control the vacuum input, the other from the main drain.. You will not be able to test the water going into the main drain, so just figure out which one is the skimmer and which is the vacuum.
Pipes #4, 5 and 6 move the water back to your pool.. As they show in the pic, only pipe # 4 has water flowing through it.. The valve right below the IC40 is set to shut off all the water going to Pipes #5 and 6
Again, you will just have to experiment to see which valve does what.. If your waterfall is running, then I would assume pipe # 4 goes to the waterfall.. Other options would be pool returns or spa or return in the lower part of the pool which would not be common...
The pipes marked with ???? looks like a pipe for an air blower to a spa?? Just to confirm your water fall is just a waterfall and not part of spa that overflows into the pool, correct???
Thanks,
Jim R.