Polypropylene pipe for gravity flow sewer water applications was included in the new edition of the Ontario Provincial Standard Specification (OPSS) and Ontario Provincial Standard Drawing (OPSD) by the province’s Ministry of Transportation (MTO).
The MTO announcement includes dual- and triple-wall polypropylene (PP) pipe, in addition to the approved use of high-density polyethylene (HDPE) pipe in diameters of 100 to 1500 mm (3.9 to 59 in.).