Inches of Water

Google 'conversion inches water psi' there will be many conversion sites.

Dratt I accidentally misstook this for the thread on making a wave height measuring device and gave it 5 stars.
NO IT'S NOT WORTH ANY STARS.

Zee Rho?

14.7 lbs/sq in * 454 gm/lb * 1 cc/gm * [ 1 in/2.54 cm ]^3 = 408 inches

Now divide that by 12 and find that 34 foot limit on how high you can lift water out of a well with a pump. The atmosphere will not "push" the water any higher, no matter how hard you pump. That's why the pump is put below the water level to "push" the water up from deeper wells.

How about 760 mm Hg

L

What is the 14.7psi absolute or gauge??

Hi kilomark

emc_c gave you your answer in post 5.

You must however remember that it is 408" under static conditions,

Meaning that if there is any movement of water friction losses must be added to the value.

Also don't be fooled by the theory that pressure can be increased by reducing the (pipe diameter) area of the column close to the bottom. The static pressure will remain the same.

Also even if you increase the size of the column to a sport stadium the pressure will remain the same.

Hi kilomark,

Now that you have the approximate answer and know how to do it, here is a site that will do it with good accuracy:

http://calculatoredge.com/

Go down to "oil & gas" and click on "pressure". You will find the conversion you want there.

regards,

-S

Greetings.

27.71 inches of water column equals 1.0 pounds per square inch.

Happy math.

Hi....

1 atm = 14.6959488 pounds per square inch or 1 atm = 29.9246899 inches of mercury. Therefore, if you may multiply it by the density of mercury to find the height of water column that will stand in 1atm under condition of vaccume.

From Domnick Hunter Compressed Air Pocket Guide.

1 lb/in² = 27.6799 inH₂O (often rounded to 27.7 inH₂O)

1 atmosphere = 14.6959 psia (absolute) commonly rounded to 14.7 psia

1 atmosphere = 33.8984 ftH₂O

Multiply 27.6799 x 14.6959 = 406.78 inH₂O

Multiply 33.8984 x 12 in/ft = 406.78 inH₂O

Ref: [14.7 x 27.7 = 407.19]

Bloody hell, lad - you're talking nearly half an inch!

Never heard of Domnick Hunter, but standard pressure (≠ 1 atmosphere) is 14.504 psi (IUPAC), or 14.696 psi (NIST). No point getting pickky when there are so many different standards.

The OP asked his question specifying 14.7 psi.

Dear Mr. kilomark,

At sea level, one atmospheric prssure is 14.7 psi (actually 14.696 psi) equal to 34 FEET of WATER COLUMN, and hence 34 x 12 = 408 inches of water. (You know 1 foot = 12 inches.)

DHAYANANDHAN.S