The OPW Pressure Vacuum Vent, No. 723V, has received CARB-EVR certification for use on all existing standard gasoline Phase I Vapor Recovery Certification Phase I EVR Executive Orders and is UL 2583 listed. The 723V installs on the top of the vent pipe on underground and above-ground fuel storage tanks and boasts a blue color to provide for quickvisual compliance verification from ground level. Designed to manage tank vapor pressure and prevent contamination commonly caused by water, debris or insect intrusion through the vent stack, the 723V features OPW’s durable, corrosion-resistant Duratuff body construction, seals and stainless steel screen filters and is designed for long-life performance. The 723V has a high maximum flow rate of 6,450 scfh at 2 psi pressure drop.