Plumbing dual overflows.

[fernalfer]

I have a 120 gallon dual overflow tank. I will be using the standard durso standpipes. The overflows are in the center pic attached. I'm at the plumbing part of my build and i'm finding it difficult to find the best way to plumb this. I have unions and cepex Ball valves but when incorporating them i feel like i run out of room. Also crossing the left return and the left drain line seems like it may be a task.

I am running all 1 inch piping mixing ultra flex PVC and regular PVC. I will reduce back down to 3/4 right before i get to the tank on the return lines.

Does anyone have pics of how they did the plumbing on their dual overflows or have any advice on the best way to do this?

here is a pic:

 

[billdogg]

Because your drains will be durso's, they really should not have any sort of restriction in them. Leave the ball valves out and just run the straightest lines you can. For mine, I put a T fitting at the end so that the "leg" is just barely above the water line in the sump. This allow the air to escape and helps to reduce noise. Also - don't try to get more than about 300gph to drain for each, 250 is even better, so ~500+ gph/hour will be your max. Size your return pump accordingly, and put a ball valve on the return line so that you can control the flow back to the tank.

hth

 

[kmbyrnes]

Have you considered a Herbie on one side, with a full siphon and a return on the other?
You'll get more flow with a full siphon, and it will definitely be quieter. If you go that route, you will want gate valves instead of ball valves on the siphons.
And no restrictions on the emergency drain at all.
My 350 is plumbed that way and it works out very well.

Herbie on one side:

Return plus full siphon on the other:

 

[ghellin]

Drains are in back, returns are in front. The two 45's are not needed a 90 is just fine and less restrictive.