Pressure Sewer Rehabilitation

Rehabilitation of steel or cast-iron pressure sewer mains is performed using a special sandwich liner with an outer layer of woven solid liner and an inner layer of non-woven felt liner. The liner is saturated with epoxy resin and can be fitted either via the inverted method or the pressure vessel, and cured by hot water or steam. Thusly fitted liner creates a composite material with the host pipe, which ensures a long-term resistance against inner excess pressure as well as outer pressure, all the while maintaining excellent abrasive properties.