# measurement questions

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

1. ### Daniel Bigdan FrazierNew Member

Joined:
Feb 22, 2014
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. ### Reach4Well-Known Member

Joined:
Sep 25, 2013
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.

4. ### DonLJack of all trades Master of one

Joined:
Mar 30, 2011
Occupation:
Rocket Scientist
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 ?

5. ### cacher_chickTest, Don't Guess!

Joined:
Jan 5, 2008
Occupation:
Test, Don't Guess!
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.

6. ### DonLJack of all trades Master of one

Joined:
Mar 30, 2011
Occupation:
Rocket Scientist
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
7. ### hjModerator & Master PlumberStaff Member

Joined:
Aug 31, 2004
Occupation:
Plumber
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.