Hydrants Flashcards
Categories of hydrants
SFH = 2 ½ + 4
DFH = 2 ½ x 4 & 4x4
SSFH = Subsurface
BUFH = Built up 2 ½ or 4 (assembled 4’’ or 6’’ pipe surmounted by angle valve 2 ½ or 4’’ outlet
Hydrant Identifiers
Open circle = 2 ½ single or built up
Half black circle = 4’’ single or built up
Full black circle = 2½x4 or 4x4
S = Subsurface
Blank square = Private
10 main = show on street where main is loated
Hydrant Identifiers
Open circle = 2 ½ single or built up
Half black circle = 4’’ single or built up
Full black circle = 2½x4 or 4x4
S = Subsurface
Blank square = Private
10 main = show on street where main is located
Hydrant with red painted top
Has static pressure over 200psi (initially done by station members
Hillside areas
Blue reflectors (butz dotz indicate hydrant location)
Flatland areas
indicate mid block or hydrants obstructed from view
- done by station - reflectors plus adhesive from S&M
Hydrant operations
Open and close slowly to avoid water hammer, hydrant valve not designed to regulate flow: Fully opened or closed. stem dislodging is very rare
Flushing a hydrant
DWP flushes hydrants. LAFD does not flush or clean out mains
Non-emergency inappropriate or illegal use
contact construction services - hydrant/assesers unit or metro
Out of service hydrant
Enter in F2 and notify officers on duty and incoming + 72hours. If not restored in 72 hours report construction services hydrant/assessment unit or metro
Information requests from public
Refer to DWP w/ no reccomendation or commitments
Drills
Officers/commanders large GPM training activities 48 hours notice
Frequency of hydrant testing
once a year in January
Hydrant testing procedures
Standard equipment, testing cap, fully open slowly - if valve chatters or if water doesn’t flow before 3 full turns, report
Remove all xxx, no abrasive lube, close slowly
