I installed 4" pvc sewer and drain pipe and the DC system works wonderfully
to all stations.

"trs80" wrote in message
...
My DC has a 5" dia inlet opening to the impeller.
If I go with 6" main pipe for my small shop DC system, should I open up
the inlet on the DC to 6".? Or should I make the mains 5" dia?
thanks for any tips