the Scotty 4000 pump is a single action pump. 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.
The Backpack (4002A) has a capacity of 5 US gallons (19 liters). Manufactured from a strong polyester reinforced fabric, protected by a thermoplastic polymer layer. It has a 4 "filler port with a removable debris screen, 2" wide shoulder straps and 3 "wide shoulder: Scotty
Indonesian National Standard (SNI) 7893: 2013, forest fire extinguisher-back pump (backpack pump) - This performance is a standard used as a guideline for forest fire suppression equipment. The back pump is a hand tool used for suppressing forest and land fires, especially for extinguishing surface fire types up to 1-1.5 m high and will be more effective if used in synergy with other tools such as kepyok.