Porty Vac Stack

[Spurlington]

Which would allow the best air flow using dual 3 stage vac motors:

Dual 1.5
Dual 2in
Single 2in
Single 3in
Single 4in
Direct to tank no stack/s

 

[Mikey P]

Id like to take my Call A Friend option...

 

[Cleanworks]

Direct to tank will provide the most airflow. (Cfm)

 

[Papa John]

Direct to tank will provide the most airflow. (Cfm)

This would mean the vacs would be on top-and I don't think you would be able to have the "ping pong ball shut off" vacuum protection.

The size of the stacks should at least equal the opening on the vacuum motor.

 

[Cleanworks]

I am assuming the vac shut off will be engineered in. Not hard to drop in a tube with a ball filter attached. Max airflow if parallel direct to the tank. Max lift is a series manifold like Larry's machine, directly to the tank.