Plumbing Drain ?

[FranktheTankTx]

Question: If I'm draining (2) tanks into (1) large sump from HOB Overflow boxes - Does the pvc need to increase in size after the point both drain lines meet?

I'm trying to visualize this in my head - and it seems if (2) drains met in 1" pvc there would be a log jam there. But if I increased to 1 1/2" pvc after the "T" Drain - it might would maintain drainage properly.

Understand what I am saying?

[moondoggy4]

I was reading from the Durso site and they stated that they liked 1 1/4'' because it is easier to work with. They also stated to use the cheaper PVC because it drains better. You could also use the spa lines they are 1 1/2''.