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 PondXpert PondPush is based on an iconic design that has been produced to reduce bloackage from dead leaves and 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 and reliability. This pond pump gets a \'Highly Recommended\' from us!