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  1. #1
    Join Date
    Aug 2012
    Posts
    75

    tee for robinair 15500 vacuum pump

    I have a robinair 15500 that im looking to up size the tee for 1/2" hoses. Any one know what size and thread type fits inside the vacuum pump? I thought it was npt, but might be acme?

  2. #2
    800 992 9898 ask for Jeremiah.

    They are AA Hydraulic Dervice. An authorized Roinair servicer.

    I got my tee from them. Was a little pricey but I know I got the right part.

  3. #3
    Quote Originally Posted by georgehvac View Post
    I have a robinair 15500 that im looking to up size the tee for 1/2" hoses. Any one know what size and thread type fits inside the vacuum pump? I thought it was npt, but might be acme?

    Where are U in MI? Im in Macomb.

  4. #4
    Quote Originally Posted by georgehvac View Post
    I have a robinair 15500 that im looking to up size the tee for 1/2" hoses. Any one know what size and thread type fits inside the vacuum pump? I thought it was npt, but might be acme?

    FYI, if you go Appion hoses on 1/2 " you will only need 3/8" tee. Found that out the hard way. My tee is 1/1x1/2 with 3/8 reducers.

    Hope this helps.

  5. #5
    Join Date
    Aug 2012
    Posts
    75
    Hey hvac5646- Im in Livonia enjoying the heat wave. Just checked my yj hoses, the're 1/2" flares.

  6. #6
    Join Date
    Aug 2012
    Posts
    75
    I called aa but they were closed. Ill try again wed. Thanks for the help!

  7. #7
    Quote Originally Posted by georgehvac View Post
    I called aa but they were closed. Ill try again wed. Thanks for the help!
    good. go for the 1/2" tee in that case.

  8. #8
    Join Date
    Jul 2007
    Location
    Delaware
    Posts
    3,824
    I remember going through this. What size thread goes directly into the pump.

  9. #9
    Quote Originally Posted by energy star View Post
    I remember going through this. What size thread goes directly into the pump.
    Can't remember the name of the thread ...but I know for sure it as tapered and the size was either 3/8 or 1/2.

  10. #10
    Join Date
    Mar 2011
    Location
    Tom Price, Western Australia
    Posts
    6
    Hi George, I have a robinair 15444 VacuMaster & the thread into the vac pump is 7/8"ONO which is Dash 14 = 7/8"UNF &14TPI, parallel thread with O Ring champher in the pump. Cheers - Leigh

  11. #11
    Quote Originally Posted by LeighC View Post
    Hi George, I have a robinair 15444 VacuMaster & the thread into the vac pump is 7/8"ONO which is Dash 14 = 7/8"UNF &14TPI, parallel thread with O Ring champher in the pump. Cheers - Leigh
    I don't think that is the same as the one the gent is talking about...I would post the intake opening but I have to find my manual.

    I found it on Google.

  12. #12
    Join Date
    Aug 2012
    Posts
    75
    I called robinair product support and they couldnt find the inlet size- go figure. Same with aa. I ordered a 1/2" npt 1/2" flare tee off fleabay for 6$ to give a try. If it doesn't fit, no big loss.

  13. #13
    Join Date
    Aug 2012
    Posts
    75
    Thanks Leigh. It looks like 15500 is smaller than 7/8.

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