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Parrallel VS Series mounted vacuum motors

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  • Parrallel VS Series mounted vacuum motors

    Question Hi , have an very early model mytee carpet cleaning machine . its old . Do you ship to Auckland New Zealand . Do you have a hose that they use to connects the motors and from housing unit to just under the tank . was keen to maybe also buy a Mytee P750 Double Plastic Vacuum Motor Manifold [P750] .
    Any help would be gratefully accepted . I would like to upgrade the hoses underneath.
    Do you sell the ali housing and plastic like the p750 but two single manifolds as mine has a series of two . Do the new units have venting for both vac motors instead of one, like my old one? . Which has better suction ?
    thanks ivan .

    We ship world wide
    We do sell 2" ID wire reinforced hose at

    the Mytee P750 manifold is located at
    The parallel vacuum motors require 2 exhaust ports.
    The cleaning performance of series VS parallel is very similar.

    This forums provides the math for figuring out which creates the highest vacuum units but I can also do the math for you if you need me to.
    Here is the summary below:
    Series formula: (Vac 1 inches of lift + 70% of vac 2 inches of lift) X (Times) (Vac 1 cfm + 25% of Vac 2 cfm) = ? Vacuum units
    Parallel formula ([vac 1 inches of lift + vac 2 inches of lift] divided by 2) X (Times) (Vac 1 cfm + vac 2 cfm) = ? Vacuum units
    Since the total amp draw remains the same the performance will be similar.

    inches of water lift @ zero cfm X (times) CFM @ zero inches of lift = Vacuum units
    The greater the number the better it works.

    Please clarify what a "ali housing" is??

  • #2
    is this posting to ?/

    Either my anti virus or email not getting though to your system . test ivan .


    • #3
      series VS parallel Vacuum

      Your question is not clear to me so I am going to guess on what you are asking which was already answered in the last post.
      Let us take the example of this vacuum motor
      104 CFM 137" Lift each
      Parallel set up is 208 cfm X 137" lift = 28,496 vacuum units
      Series set up is 130 cfm X 232.9" Lift = 30,277 vacuum units.
      Series set up is only better by 6%
      Please note with the wand on the floor all these number are cut in half.


      • #4
        i just posted and post dosnt come up ie reply to thread . not sure whats going on . i

        this working . clicked to reply , and submit reply but not working ? .


        • #5
          double vac or single vac manifold

          Hi ,
          Which is better the p 735 or p 750 vac mainfold .


          • #6
            i see the new machines vent each motor and have two tube running into waste tank

            Hi ,
            I see the new machine have two tubes running into waste tank . and vented around base of machine on each side of units . not one vent under the unit like my old 7500 mytee . is there a big performance difference in doing that now .
            sorry but i wanted to show web links and moderator must have got nickers in a twist with me trying to post this . and im at the bottom of the world .
            Bloody kiwi i here you say . moderator sorry ( it was a joke ) .
            ivan ,


            • #7
              If you could redesign

              Hi . If one could redesign vac motor assembly would you go for the twin motors on vacuum plastic that has them side by side instead of in side by side and hose linking the vac together. And having to base vac moldings on aluminum base plate . Which has more suction .
              The Web links I talked about was for guick picture references so one could see in picture for .sorry for upsetting you .


              • #8
                changing a machine from series vacs to parallel vacs.

                You did not upset me, rather I am not understanding what you are trying to do. Whether you have two vacuum motors in parallel or two vacuum motors in series, the performance at the end of 15 meters of hose and then through a wand on the carpet is about the same. Not enough difference to go through all the trouble to change it out. Where you do experience larger improvements is with a parallel system with upgrading to 2" ID vacuum hose. When you have over 200 cfm you should be using 2" for the majority of the hose run and then just use 1.5" ID hose next to the wand, example the last 4 meters. If you building a machine from scratch, using the parallel design with 2" ID hose will allow for longer hose runs.

                Related link
                115 ft hose set with the last 15 ft 1.5" ID