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• r • <br />IMPORTANT: OPW products should be used in compliance with applicable federal, state, provincial, and local <br />laws and regulations. Product selection should be based on physical specifications and limitations and <br />compatibility with the environment and materials to be handled. OPW MAKES NO WARRANTY OF <br />FITNESS FOR A PARTICULAR USE. All illustrations and specifications in this literature are based on the <br />latest product information available at the time of publication. OPW reserves the right to make changes at any <br />time in prices, materials, specifications and models and to discontinue models without notice or obligation. <br />400 P V� <br />EVR certified pressure vacuum vents (623V-2203 623V-3203) <br />Pressure Vacuum Vents and Adaptors <br />Pressure Vacuum Vents are installed on the top of vent pipes from underground or aboveground fuel storage <br />tanks. The vent cap and internal wire screen are designed to protect the tank vent lines against intrusion and <br />blockage from water, debris or insects. A normally closed poppet in the valve opens at a predetermined <br />pressure or vacuum setting to allow the tank to vent. <br />Table of Contents: <br />1. Features <br />2. Conversion Table <br />3. Materials <br />4. Replacement Parts <br />5. Ordering Specifications <br />6. Additional Resources <br />