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IMPORTANT: OPW products should be used in compliance with applicable federal, state, provincial, <br /> and local laws and regulations. Product selection should be based on physical specifications and <br /> limitations and compatibility with the environment and materials to be handled. OPW MAKES NO <br /> WARRANTY OF FITNESS FOR A PARTICULAR USE. All illustrations and specifications in this <br /> literature are based on the latest product information available at the time of publication. OPW <br /> reserves the right to make changes at any time in prices, materials, specifications and models and to <br /> discontinue models without notice or obligation. <br /> A�Auum <br /> 61 SO Series Overfill Prevention Valves (61 SO-3000 61 SO-1000 61 SO-100C 61 SO-4000 61 SO-4010 <br /> 61 SO-400C-EVR f 1 SO-42OC-EVR 61 JSK-4400-EVR 61 SO-4901 61 SO-490C <br /> 61 SOM-4121 61 SOM412C-EVR 61 SOR 61 SO-4BYT 61 SOC-4BYT 61 JSK-4RMT 61 SOC-4001 <br /> 61 SOC-4011 61 SOP-4002 61 SOP-4012 61 SOCM-4000 61 SOR-4000 61 SORM-4000) <br /> The OPW 61 SO Overfill Prevention Valve is designed to prevent the overfill of underground storage <br /> tanks by providing a positive shut-off of product delivery. The shut-off valve is an integral part of the <br /> drop tube used for gravity filling. The OPW 61 SO allows easy installation (without breaking concrete) <br /> and requires no special manholes. <br />