Troy
I put the 2 90's on the input because the sump the skimmer is going into will not be too big so the pump will probabily be pretty close to the skimmer. I guess I could put 1 90 on it and then used plastic hose and bent it toward the skimmer. I still haven't finalized the input plumbing so it may change in the future.
Besides I saw skimmers for sale from other companies on the net that did it that way. So, I did too.
I am also going to put a union on the input near the 90's so I can disconnect the skimmer from the pump easier.
The holes in the bottom of the first riser are to let the water back out into the box. The water comes down the Beckett injector tube and through 2 2" 90's inside the box. The water and air them come up a 2" injector tube (not shown in place in the pictures) in the middle of the first riser. The water then exits the riser through the holes into the box and out the valve.
I stole the idea from Cheapreef
He borrowed it from a guy on RC who makes them for sale. It looked like an interesting idea.
