26-23 mm Expanding Tapered Rubber Plug Washers, Nut and Bolt expands to 40mm.
- Commonly used to seal or block of pipe.
- Uses block off main drain in pool skimmer box.
- Block off pipes when servicing equipment that may be below water level.
- Block off pipes to find out if it stops pool losing water.
- The tapered plugs are not good if under pressure being tapered.