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What size vac pump

What size vac pump is really needed for Residential work? Robinair has a nice 10CFM pump, but I doubt that's going to save hours of time vs a 6 CFM pump. Our average system is 3 - 5 ton, nothing bigger. For the price of a ten, I can get 2 - 6's


  • meplumber
    meplumber Member Posts: 678
    I don't see the need for 10 cfm.

    I have an old Robinair 4 cfm.  Had it for years.  Serves me fine on residential and what little bit of commercial that I do.

    Higher cfm is supposed to mean quicker evacuation.  I have no complaints.  Maybe if I was doing 15 or 20 ton jobs, then maybe.  5 cfm is my target when I buy new vac pumps.
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