A drain stopper for the 21st century  
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uses a pivoting cam system to expand a traditional drain stopper whereby a rubber seal is forced onto the pipe wall causing temporary sealing of the end of an open pipe, duct or drain

The Technical Bit:
  In pressure tests against the traditional wing nut stopper, when set in opposing ends of a common test pipe, the always withstood a higher pressure before peak movement. The traditional plug usually fails by twisting. This is restricted on the by the locating heel set in the pipe invert or crown
 
Key Benefits
 

The can be installed up to 6 times quicker than a standard stopper and retrieved up to 20 times quicker in a 900mm deep inspection chamber.
The operator does not have to enter the manhole to retrieve the unit providing a rope is attached during installation.

   
Also Note
  has also been granted approval by WRc under the 'WRc Approved TM' certificate number PT/266/0903.