I have noticed with a short 2” hose length and High Performace 3 stage Mytee vacuums in parallel create to much suction and sucks any water droplets or sudds that get close to it through the vacuum. I guess that is too much cfm at that length but I like to maximize my CFM when I am using a rotary with the portable. I think 2 3 stage High Performance vacuums from Mytee are all you can hand in their machine. I have one Mytee Breeze I put 2 3 stage HP vacuums in and another I put a New LX Vacuum if front of a high performance 3 stage in series and they both are insane and almost to much without some way to stop water from entering the vacuums. My in series unit is not as bad at water entering the vacuum, but my parallel set up will spit through the vacuum after a gallon in a 10 gallons waste tank. So I was thinking if the LX vacuums were parallel they would just be over kill and suck water from the waste tank? Or do the motors have both the most efficient lift and cfm’s in series. Does knowing all this make you parinoid or the best high rise carpet cleaner jk.