Flexible Shaft Water Pump is mini centrifugal pumps of single type; they are widely used for pumping and draining in const RB series of flexible shaft pumps are mini centrifugal pumps of single type; they are widely used for pumping and draining in const- ruction building sites, tunnels, culverts,water reservoir, etc, also for wastewater discharging in industry, irrigation on farmland and so on, ...