measurement questions

Discussion in 'Plumbing Forum, Professional & DIY Advice' started by Daniel Bigdan Frazier, Feb 22, 2014.

  1. Daniel Bigdan Frazier

    Daniel Bigdan Frazier New Member

    Messages:
    2
    Location:
    south carolina
    20 x 17mm 4/5" x 43/64

    I've researched how to divide this formula up to better understand and know each dimension and what each measurement corresponds with but the only part i understand is 4/5 is the outside diameter.

    so can yall tell me how to break this up piece by piece?
  2. Reach4

    Reach4 Well-Known Member

    Messages:
    2,401
    Location:
    IL
    Nobody is going to figure out what you are asking from this posting. I only figured that out from your other posting that was a little more coherent, and where you got useful info: take it to the store and see what thread fits.
  3. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,314
    Location:
    Houston, TX

    Your measurement conversion is off a bit.


    20 mm = .7873992 inch (4/5" = .80 inch)

    17 mm = .6692893 inch (43/64" = .671875 inch)


    What are you having a problem with ?
  4. cacher_chick

    cacher_chick Test, Don't Guess!

    Messages:
    3,249
    Location:
    Land of Cheese
    Plumbing pipe fittings are standardized. You are working to hard at being an engineer instead of just getting the job done.
  5. DonL

    DonL Jack of all trades Master of one

    Messages:
    4,314
    Location:
    Houston, TX
    Very few Metric sizes will come out being a even fraction in inches.

    The USA was going to go to metric, But I never seen it happen, but we did learn it in school.

    China parts do not match US made parts if you get your Micrometer out and measure.


    Have Fun. Were is the other thread ?
    Last edited: Feb 23, 2014
  6. hj

    hj Moderator & Master Plumber Staff Member

    Messages:
    26,815
    Location:
    Cave Creek, Arizona
    quote; the only part i understand is 4/5 is the outside diameter.

    That is the only dimension you need to know. Your faucet has a 20 mm outside thread so you need a 20 mm to 1/2" ips female adapter, then you can convert to your hose thread from that.
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