The 9095A AST Overfill Prevention Valve is installed at the fill port of an aboveground storage tank. Used in a tight fill application, the valve terminates flow of product when the liquid level reaches a preset warning level (90-95% full). The valve is installed on a standard N.P.T. male connection when used with the quick disconnect or female adaptor. When installed to manufacturers requirements the Overfill Prevention Valve can eliminate environmentally hazardous spills. A built-in bleed hole also provides anti-syphoning protection. ULC Listed. The valve can be used in conjunction with the Morrison Fig. 518 and 515 lines of AST Spill Containers for added spill protection. All models are supplied with an adaptor to mount Morrison Fig. 419 aluminum drop tubes. A test mechanism is also sold separately for denoted models. The test mechanism allows a technician to pull on the test line at any time during the filling process to actuate the float and stop the fill. This allows a technician to verify the valve is working properly. This Valve Complies With the Following Codes: NFPA 30, 30A, UFC, BOCA, SBCCI/SFC and PEI /RP2000 Product Warnings and Cautions: ? 5 PSI 5 GPM is the minimum flow requirement for valve operation at the following maximum viscosities (in centistokes): 2" Valve?150 3" Valve?60. ? Maximum flow rate of the 2" valve is 125 GPM at 100 PSI. The 3" valve is 300 GPM at 100 PSI. ? The valve cannot leak more than 1.5 GPM. ? A tight fill is required for the valve to operate. Do not substitute any other fill adaptors for the special adaptor supplied. ? The valve must be used with clean product. Debris from products such as contaminated waste oil may cause the valve to function improperly. ? Consult Morrison Bros. Co. for product compatibility with the valve. ? The 3" valve can be used w/6" Sch. 40 or 80 pipe. ? The 2" valve can be only be used with Sch. 40 pipe. ? These valves are rated for a maximum pressure of 100 PSI