Drain Size Question

[GOLDRAM]

I am putting together a 400 gallon system and the Drain Calculator says to turn over 2000 GPH that I need a drain = 1.85 inches. Can I split this between two 1' drain Pipes??? I thought that a 1' in pvc pipe could only handle 800 Gph....... Thanks for you insite and help

[RokleM]

Remember in pipes, 1+1 does not equal 2

On a 400, I would personally probably put in 2x 2" or 3x 1.5" for redundancy.

[GOLDRAM]

Got it Thank You !!!!!!!!! Will post pics as we progress with the set up.