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Fire Hydrant Minimum and Maximum Height

S

Saber Elkassas

Registered User
Joined
May 25, 2021
Messages
12
Location
Egypt
Hello,

I have a clarification regarding the minimum and maximum height of the hydrant outlet as referred in NFPA 24 2019:

"7.3.3* The center of a hose outlet shall be not less than 18 in. (450 mm) above final grade.
7.3.3.1 The center of a hose outlet shall not be more than 36 in. (900 mm) above final grade."

Which hose outlet is the concerned here in these sections, the 2.5" outlets or the 5" pumper connect?
 
TheCommish said:
Te center line of most modern hydrant ports is all on the same plane
Click to expand...


But if you do it to the middle of the 2.5, is it possible the five inch would either be a little in the ground, or so close that you could not spin on the hose?
 
cda said:
But if you do it to the middle of the 2.5, is it possible the five inch would either be a little in the ground, or so close that you could not spin on the hose?
Click to expand...
What TheCommish stated that I agree with is that on most hydrants available today the centerline of all of the outlets is the same as it doesn't matter which port you measured to since the code specifies the centerline of the outlet.
 
Other ways to look at it is if you cannot spin a standard hydrant wrench which is around 18 inches long it is to close to the ground and the bolted flange is designed to be about 2 inches above grade, so the contractor has to order the correct buried barrel length for the main
 
Msradell said:
What TheCommish stated that I agree with is that on most hydrants available today the centerline of all of the outlets is the same as it doesn't matter which port you measured to since the code specifies the centerline of the outlet.
Click to expand...


There are those funny looking California WET hydrants, with all different level outlets!!!
 
True, for a wet barrel I would go with the CL of lowest port. Then there is Boston which in about 200 a cording to my shoce took all the Lowrey Chuck flush mount hydrants off their engines1624320428483.png


and airport with hydrant in the ground.

1624319818773.png
 
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