H20eng: great, thanks for the shots. That makes me feel better
I'm playing with the plumbing layout in my head right now I'm concentrating on the overflows first. I'm looking for a bit of input if people want to chime in. Since I'll have an internal skimmer It simplifies the plumbing on the overflows a bit.
I have 2 overflows. Each is drilled for 3 bulkheads. I'm going to install 3 bulkheads in each and cap one in each of the overflows for later expansion. That leaves two bulkheads in each overflow. One in each overflow with be the main drains. 2" Pipe. The others in each overflow will be the emergency drains. Again 2" pipe. The emergency drains will have taller standpipes int eh overflows with no silencers.
Ok here is what I'm playing with. I need to run all these overflows along the tank, around the side of the tank, then over to a wall, take a left turn, another left turn and head over to the sump. So a 90 out of the overflow to go horizontal, a 90to get around the corner of the tank, a 90 to go along a wall, then another 90 to get to the sump, then another 90 to go vertical into the sump.
I really don't want to plump 4 2" pipes especially because I'm only planning on flowing 1400 ish gallons an hour through the sump at this point. I'll be using the dart and with the head pressure thats approximately what I'm seeing. The return I'll describe later.
So what I'm thinking of is ting the 2 overflows together and Ting the 2 emergency overflows together. I've never heard of a mass clogging the pipe once its past the overflow, and even if one does, there is still another 2" pipe that can handle the full load.
So basically 4 standpipes which feed into 2 drain pipes. This sound good?