Overflow plumbing

Id say increase it on your drain if you can... it sometimes quiets the flow into the sump... and unless your return pump has a bigger outlet than a 1" don't bother... but if its like a dart or something at 1.5" outlet or whatever they are...... I believe you will get that slight increase on flow if you have the right pump pushing pushing the right amount of pressure though the larger lines...  and I would reduce it as far out as you can / at the bulk head

Static pressure the pumps can put out compared to the dynamic pressure we will lose in our plumbing size...  I guess that would be a good experiment to mess around with...


Edited by Nick801 - February 14 2011 at 10:46pm

Water that goes through a short small opening just goes through faster and loses a little pressure. A 2" drain pipe above the bulkhead is great if there is room for it in the overflow, but below the bulkhead 2" may be overkill when 1.5" is typically sufficient.

Flex pipe is awesome because it helps avoid the need for pressure stealing elbows. Water that has to turn a 90 degree corner loses a lot of momentum. I will more often use less water flow resistant 45's where a bigger bend is required.