b'Features Standard Sizes from 4" to 14" Very reliable and long lasting Only periodic inspections needed New or retrot applicationsenvironments Easy installation and maintenance Can be removed/replaced without entering basin Corrosion resistant designed for rugged environments No electric power required Converts existing drains to secondary containmentOil Stop ValveParkUSA OilStop Valve (OSV) is a device designed to preventenvironmental catastrophe in the event of an oil or hydrocarbon spill.The OilStop meets EPA Spill Control and Counter Measures (SPCC)requirements. The patented, yet simple passive design of the OSV isautomatic and requires little maintenance.The OSV can be used to enhance the operation of oil-water separators, inlets basins, and spill containment vaults and manholes. The OSV is an added assurance of non-oily water discharge.OilStop Valve is protected by US Patent #9,963,358#BUILDING AMERICA!FLY FOAMTROOPER UNIWW L STO2.2P VALVEVeOrIsion Standard'