This deal sucks big time, up to 13,000 litres per hour. This is an excellent price for a pump of this capacity.
I bought one of these a couple of years back for pumping out my garden pond and it has worked well.
* Heavy-duty water pump with powerful 650 watt motor
* Maximum pumping capacity (l/hr): 13,000
* Quiet, maintenance-free motor with overheat protection
* Max. immersion depth (m): 7
* Includes 8m rope, 10m cable and instructions
* 3 year manufacturer's warranty
* was £24.99