Volume 3 6/5 Hydrants Flashcards
Horizontally valved hydrants are either ____ and have either _____
a singel 2 1/2” or a double hydrant / have either a boiled or caulked valve assembly
Vertically valved hydrants has a ____ and a _____ assembly.
a single 4” outlet and a bolted vertical vale assembly
Built up hydrant is assembled from a _____ with a _______
4” to 6” pipe surmounted by an angle valve with a single 2 1/2” or 4” outlet.
Built up hydrants: the 2 1/2” type is used in areas having ___
high water main pressure over 200 psi. (identified by red top)
Subsurface hydrant: normally found on ____,
Airport property
Subsurface may have ___ or _____ and are covered by _____.
single or multiple outlets and are covered by a heavy steel or cast iron plates.
Subsurface hydrant covers are usually painted _____ for identification.
Yellow
Drafting connection consist of ______ reduced to a ____ having standard hose threads.
6” pipe reduced to a 4” pipe
Drafting connection: Lead to a ____ source of water
non-pressurized
Drafting connection: to obtain water it is necessary to use a ____ and _____
HARD suction and normal drafting procedures.
Drafting connection: When these connections are not being used, it is important that the caps be maintained _______ to prevent _____
spanner tight to prevent containment of water supply
Eddy valve is a gate valve installed on a hydrant OUTLET for ______
use by contractors
When the eddy valve is installed, the hydrant valve shall be completely ____
opened and left in this position.
Angle valves are connected on ______ of an existing hydrant and are for the use of other city departments for _____
TOP / filling tanks, flushing streets, etx.
Chattering in a hydrant is usually caused by a ____
loose valve
