Ring-Tite® and Enviro-Tite® piping systems are SDR 35 and SDR 28 sewer pipes manufactured to demanding ASTM and CSA standards. Enviro-Tite®, available only in Canada, has a minimum recycled material content of 50%. This sustainable pipe system is made from an innovative co-extrusion process, allowing for 50% use of high-quality reprocessed PVC while increasing product performance, making it one of the most environmentally friendly sewer pipes available.