Quote:
Originally Posted by Myka
It sounds like the "dual returns" are 1" bulkheads drilled in the bottom of the tank? If so, they would work as dual drains for a Herbie style overflow. You would need a gate valve for this (about $30). You would need the drain pipes to have stand pipes so they are close to the surface. The main drain will be about 2" below the tank's water line, the emergency drain will be level with the water line.
If you choose an appropriate sized return pump you don't need a ball valve to throttle back. You can put the return over the top of the tank to leave two drain lines.
I would suggest a return pump about 375-500 gph based on about 52+10 (half the sump) = 62 gallons of water. That will give you 6-8x turnover through the sump. Any more and you will have a major micro-bubble problem considering your single baffle. Any less and your skimmer will not perform its best. I would suggest you stick close to 6x turnover.
Speaking of baffles...how tall is your baffle? What is the suggested depth of water your skimmer's manufacturer suggests? Is your baffle acrylic?
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I have a single drain at the bottom of each overflow box. As for the return its 1 that splits into 2 return and is also 1". Return lines are already plumbed.
I am going to pick up a return pump tommarow so I will find something thats in that range for sure.
The acrylic baffle is 9" to the bottom of the cut outs and the sump is a standard 20 Gallon so its 15 3/4" tall. The recommended water level for this skimmer is 10" so I just siliconed in another 10" baffle
. Now my return pump will be in its own compartment which will be better for debirs anyway
Do I need emergency drains cause I could for sure build one shorter.