Pronal introduces its multi-staged stopper line: the Uni-Plug for low pressure pipe maintenance, the O.T.R. for test and inspection of sewage networks, and the O.F.R. for environmental protection.
The stoppers are made from rubber or elastomer coated reinforced fabric, and they can be installed in the uninflated state.
Pronal, ZI Roubaix Est, BP 18, 59115 Leers, FRANCE. Tel: 33-3-20-99-75-00; Fax: 33-3-20-99-75-20.