The “Enviro-Valve” is a ready to install water diversion system for wash down pads and parking lots. Under the Resource Management Act 1991, trade waste and runoff from potentially contaminated areas must be discharged to the sewer network. Most utility providers prohibit stormwater intrusion to the public sewer network allowing the first flush contaminated stormwater flow only. The “Enviro-Valve” is a relatively inexpensive alternative to erecting a roof over a wash-down area, and is ideal for all first flush diversion requirements.

Enviro-Valve Specifications and Installation Manual