Permastran pipe is a specialized type of restrained-joint polyvinyl chloride (PVC) pressure pipe manufactured primarily for municipal water transmission, distribution systems, and force mains. Designed with integrated mechanical joints that lock sections securely together, it resists high internal pressures and external soil stresses without requiring traditional concrete thrust blocks at bends. Its corrosion-resistant composition makes it a long-lasting alternative to ductile iron or steel piping in corrosive environments.