It's said that you can't beat a bottom drain system. If you have a pond that doesn't have a bottom drain but wish you had installed one, or do you have a bottom drain and want to install another here is the answer. A bottom dome that sits on the floor of your pond which requires no digging or intensive labour. Just simply place the self -weighted bottom dome in your pond and attach a pipe from either an internal pump such as an oase aquamax or promax (these pumps have two inlets) or an external pond pump,and enjoy all the benefits of a bottom drain with minimal expense. This aerated bottom drain dome improves water circulation and helps remove suspended particles and debris from the bottom of your pond reducing maintenance. It is up to 30% more efficient in pulling the solid waste into the drain compared with the non aerated version. This item comes complete with a 90 degree bend and a stepped hose tail and 5 metres of air line to fit into a 4mm or 8 mm connector. This unit will take 2" pipe work direct to the 90 degree bend. Dimensions: Length 380mm (15") Height 130mm (5 1/4")