We have always recommended this pond pump for larger water garden installations. It boasts a maximum flow rate of 16000lph yet strong 'back pressure' means it continues to produce a flow of 14, 200lph at a head height of 1m (3'3"). The Pond Xpert Pond Push is based on an iconic design that has been produced to reduce bloackage from dead leaves & other debris. Despite the massive water force created by this pump the ' Eco' motor offers class-leading low running costs, a maximum of 220 watts. The ceramic impellor shaft ensures long life & reliability. This pond pump gets a ' Highly Recommended' from us!