Chp 13 Flashcards
Water shuttle def
To supply water to incidents where relay pumping is not a viable option
Relay pumping gives more reliable water supply with fewer app but more work to clean up
Shuttle more dangerous because all pieces are constantly moving
Shuttle or relay?
Depends on distance to water supply
Required fire flow
Type of equipment the dept has
May start as shuttle while relay is set up
Shuttle apparatus
Water tender
Pumper
Shuttle pumpers
Unless using a hydrant, two pumpers needed; one at the water supply one at the attack site. May be attack pump or feed the attack pump
Must have 1000 gpm or greater to fill 1000 gpm tenders
Shuttle tenders
Weight limit usually 2000 gal
Tandem real axle or semi can carry more
If only for shuttle, no pump needed
Some dept opt for 750 gpm pump anyway (pumper tender)
NFPA requires 1000 gal capacity and pump for tenders
Vacuum tender fills on its own from the source at 2000 gpm and lift of 22’, discharge at 1,750 gpm
Must dump from left, right and rear
Also dump at 1000 gpm
Must be vented to control pressure when filling/dumping
Shuttle variables
Fill and dump times are dependent
Response and travel time are independent
If discharge is MDH need two external fill connections
Fill hose
LDH fills quick but is heavy and hard to work with
3” may be better
Tender discharges
Gravity: 8” or larger pipe; manual or electronic valves
Jet assisted: small diameter; pump creates a venturi but have to have and take time to start pump, may freeze, or overshoot the tank
Shuttle decisions
Location of dump site Location of fill site Route of travel Number of vehicles needed Best done during pre planning
Location of dump site
Close but out of collapse, exposure range
At intersection of narrow lane
Good for tenders to dump and drive through not turn around
Location of fill site
Should be 1000 gpm supply
Little or no backing is better
May need several fill sites
Route of travel
Most hazardous part Circular is best, consider grade when tenders are full Narrow roads Long driveways Blind curves and intersections Winding roads Steep grades Inclement weather Freezing water
NIMS
Water supply group headed by group supervisor
Reports up chain to perations section chief or IC
May create water supply branch under branch director
Create dedicated channel if possible
WS Group Supervisor monitors fill and dump sites for supply/use
Fill Site
Position pumper to see both source and tender
Connect at least LDH and super plug
If drafting minimize lift, consider portable pumps if site is inaccessible and leave dump line going for prime and heat
Place a cone for tender stopping point, minimize stretch
Tender top fill
PVC is brittle so ry aluminum
Pump pumps water through SDH to inline siphon
Bad way to do it
Or with a permanent manifold fed by site pumper
Better way to do it
