This WaterMark Technical Specification sets out requirements for plastics-bodied reflux valves manufactured from PVC-U (Polyvinyl Chloride Unplasticised) and ABS (Acrylonitrile Butadiene Styrene), that are intended to prevent the reversal of waste water flow by means of a resilient-seated disc/flap or other mechanism. It covers nominal sizes DN 100 to DN 600.
Watermark Specification
WM Specification File
WMTS-006-2014.pdf (1.26 MB)
Certificate Current Certification Date Current Expiry Date Status
000502 Active
023090 Active
023075 Active
074826 Active
000540 Active
040146 Expired