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12-20-2005, 02:43 AM
Instead of drilling,you could do an over the top closed loop.7140gph w/4' head is alot of flow,just did a search on it,that thing is a beast.It has a 2" intake/output.There's no way you can get that kind of flow through your sump.You will need 2-2" PVC intakes that will hang over and into your tank.These will need to be screened off so your critters dont get sucked in.The PVC intake will get joined together behind the tank with a T fitting,from there you will plumb down to your pump.Just before the pump,install a ball valve then a union so you can remove the pump for cleaning.On the output side,start your plumbing upwards with a union then another ball valve,continue to plumb it upwards to the top of the tank where you will add a T fitting.From the T,you will need to make a water return manifold.Its just a PVC loop that gloes around the perimeter of your tank that has PVC T's installed in the "loop" that are used as water outputs.I'd go with 7-9 outputs(PVC T's) on your loop(return manifold).This PVC loop will be joined back at the T fitting that you plumbed up from the pump.
For some pics,check out Dakar's nano thread so you can get a basic idea of the return manifold thing
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