This is the Oase DN110 Discharge pipework for use with the Oase BioTec 30, BioTec ScreenMatic 36, BioTec Premium 80000 and the ProfiClear range of modular Pond Filters. The pipework is 100mm in diameter and uses a push fit system for simple and easy water tight seals. Use in conjunction with other DN110 Discharge pipework to make a complete water return from the filter. Genuine Oase pipework 100mm Diameter Pipework