High pressure pond pumps are designed to give high water flow at greater heights and longer lengths than other pond pumps. This makes them ideal for moving water to the top of waterfalls that are much higher than the surface of your garden pond. So, if your waterfall is over 2m high a high pressure pump would be the best choice.
Bradshaws Direct (UK) - suppliers of pond liners (pvc and butyl liners), underlay, pond pumps, filters, pond vacuums, fish food, water features and many other water garden accessories.