Mark Mandell - Gone Round In New Jersey
and not 5".
Go to a plumbing supply and get 6" "S&D" pipe and fittings Then you use 6x6x4 Y's for your 4" runs to the machines. Put in the Y's ( not T's) so that the air.
The borgs ( Lowes, Home D, etc) don't carry S&D which is thinner and half the price of the schedule 40 PVC that they carry