Designed for large ponds and waterfalls. Br perhaps the largest capacity and most solidly built pond pressure filters we have ever seen. Due to the high quality of materials used in their manufacture and extra strong lid clamps these filters can handle higher levels of water pressure, and thus serve bigger ponds and higher waterfalls. Br they are also equipped with a seven position handle switch which means the filter can be simply and effectively cleaned backwashed without removing the lid when turned to then clean position. Dirty water then exits via the waste outlet. Br the other options include br • back wash valve washes away the dirt in the valve br • pond drain empties the pond br • filtration standard running position br • medicine position water runs back into the pond by passing the filter media. Br • stop pump can be cleaned, whereas the water remains in the filter br • winter new drops the water within the container by about 2 inches which prevents damage to the rubber sealing ring in severe winter conditionsthe clear control range of pond filters are extremely popular on the continent. The velda brand has more exposure in other countries and they are known as a premium brand. Buy this pond filter with confidence. Br br note uvc bulb included.