SPR TECHNOLOGY – Rehabilitation of Large Manhole-Sized Profiles

SPR Technology is used for rehabilitation of large manhole-sized headers and tunnels. A plastic band is wound around the base frame which follows the original shape of the rehabilitated piping. This band is then fitted into a firm lock. This gradually creates an annulus which is then filled with a mixture stabilizing the structure. Using this technique, it is not necessary to pump the flow agent away from the rehabilitated piping. SPR Technology can even be used in headers and tunnels of profiles larger than DN 3,000.