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bypass valve closes completely. No additional liquid can flow into the tank until the level <br /> drops below a reset point. Models of the 61 SO are available to meet virtually any UST <br /> application including two-point,coaxial,poppeted coaxial and remote fill. The 61 SO- <br /> 3000 provides two-point overfill protection for 3" riser pipes, and the 61 SO-1000 and <br /> 61SO-1000 (CARB) feature a grooved-tube design for use with tank gauging systems. <br /> Methanol and CARB (vapor-tight)approved models are also available. The OPW 61 SO <br /> is approved by the New York City Fire Department. (Approval#4902) <br /> Table of Contents: <br /> 1. Features &Advantages <br /> 2. materials <br /> 3. 61 SOR Remote fill <br /> 4. 61 SO Vapor-Tight Remote Fill <br /> 5. OPW Overfill Prevention-EVR <br /> 6. 61SO Two-Point <br /> 7. 61 SOC Coaxial <br /> 8. 61SOP Poppeted Coaxial <br /> 9. 61 SO-4BYT <br /> 10. Ordering Specifications <br /> 11. Replacement Parts <br />