"John Rutz" wrote in message
...
snip
go with the largest pipe you can, my mag drives have 1 in outlets but to
get full capacity(GPH) out of them I use 2 in pipe, Im redesigning the
filters and moving em farther from the pond so am planing on going to
4-6 in pipe

So 4'' for my bottom drains, skimmer, filter, all runs?

BV.