Protecto 401™ Lining made by Induron effectively protects and extends the life of Ductile iron pipe intended for challenging sewer pipe applications by not allowing gasses to penetrate and harm the iron pipe and fittings. It's been successfully used in hundreds of sanitary sewer applications and proven in both laboratory testing and decades of actual sewer service. Protecto 401 is not for use as a potable water lining, and McWane Ductile marks all pipe and fittings "for sewer use only." For more information, visit https://www.protecto401.com/.