Designed to clear blocked drains by an injection of water at high pressure to dislodge the blockage. Supplied with 70mm diameter cup suitable for sinks and baths. A 150mm diameter cup for cleaning toilets and urinals is available (Stock No.21838). To use - the Drain Blaster is filled with water, placed over the plughole and water blasted into drain using the plunger. Suitable for recessed wastes only. Display packed.