The Scotty 4000F pump is a single action pump, with a foam educing attachment and air aspirating nozzle (4003). The 4000F-BP eliminates the need to batch mix when Class A foam is required. Each time the pump is charged, 1% of foam concentrate is educted into the pump chamber. The 4003 air aspirating nozzle generates foam when the pump is discharged.
The pump has a brass pump chamber protected by an engineering grade polymer sleeve. No tools are required to disassemble the unit, it can be completely disassembled by hand for in-the-field maintenance.
A Pump Maintenance kit is available from Scotty, part FP-REPAIRKIT.
The Back Pack (4002A) has a capacity of 5 US gallons (19 Lts). Manufactured from a strong polyester based fabric, protected by a thermoplastic polymer. It has a 4" filling port with a removable debris screen, 2" wide shoulder straps and 3" wide shoulder pads.
See Demonstation in WMV (WMV 3.03MB)