The BB-4® series is a full range of high-pressure centrifugal pumps, and the Forest Fire Bureau has been using it for more than 40 years on its Type 6 brush fire truck. It has become the weapon of choice for field operations. BB-4® using portable and vehicle-mounted configuration, all models are unique oil-sealed bearings and anti-foaming mechanical rotary seals. The unique function of the BB-4® pump is the quick release of the pump end, which can be interchanged with the MARK-3® pump, which greatly reduces the spare parts inventory and allows rapid on-site replacement.