- Predl Systems has 25 years of proven performance in North America. 1.5 million MH Base Liners are installed worldwide. Pierce County WA has installed 10,000+ - Predl Systems' MH Liners prevent H2S corrosion that damages concrete MHs. Polymer liners provide smooth non-porous flow channels to reduce H2S gas formation, and insert an impervious barrier to isolate the sanitary sewage from the concrete MH structure. - Predl Systems' MH Liners are proven to control I&I. Pipe specific Bell designs with compression seal gaskets ensure watertight connections between MH Base Liner and pipe system eliminating a major source of I&I. - Predl Systems' MH Liners reduce the need and expense of servicing MHs for the planned life cycle of the sewer utility. - Predl Systems' MH Liners provide a cost effective rehab solution. Failed MHs due to H2S gas and hydrostatic groundwater pressure can be permanently repaired with PREDL's Liner system and services. - Please visit Predl Systems at www.predlsystems.com; or call 1-855-773-3562.