This WaterMark Technical Specification sets out requirements for moulded PVC-U anti-infiltration overflow-relief devices, of nominal size DN 100, that are intended, upon installation in an overflow relief gully (ORG), to prevent the infiltration of surface waters to the sewerage and drainage systems and provide for the overflow relief of any surcharge of the sewerage and drainage systems.
Watermark Specification

WM Certificates associated with this Specification

Certificate Current Certification Date Current Expiry Date Status
060136 16 Aug 2022 15 Aug 2027 Active