34mm to 39mm Expanding Rubber Plug 2 Washers and Nut Bolt Expands to 40mm.
- Stock can change from stainless steel to nylon or brass.
- Commonly used to seal or block of 40mm 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.