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f� PERM 200 -17 Use this test procedure in conjunction with the manufacturer's installation and maintenance instructions. Visually verify that all tank -top fittings are leak - free and vapor -tight before starting the test proce- dure. If any fittings are loose, the ball float valve will not restrict flow. Inspect the drop tube to ensure that it does not have an automatic shut off device. 7.2.6 Inspection Procedure. 1. Remove the ball float valve assembly from the tank. 2. Visually inspect the ball float and cage. Remove any debris or foreign objects. 3. Check the ball for holes and cracks. It should move freely in the cage. Check for corrosion that affects the operation of the ball float. 4. Check the vent orifice in the vent -restriction pipe. It must be open and located near the top of the tank. 5. Use the ball float valve manufacturer's installation procedure to determine if vapor flow will be restricted when the tank is no more than 90 percent full. 6. After inspection of the ball float valve assembly, reinstall it following the manufacturer's installa- tion instructions. 7.2.7 Pass/Fail Criteria. The ball float valve passes the inspection if the ball float valve functions FIGURE 7-3. To avoid damage when removing or rein- stalling the ball float, use an extractor tool recommend- ed by the ball float manufacturer. 49 pei.org n z o O D a 7 i K S w 7 O n' as designed, flow restriction occurs when the tank 0 11 is no more than 90 percent full, and the tank -top s� fittings are vapor -tight. o • � a m If any of the following configurations exist, the F UI overfill prevention system fails the inspection: _a • ball float valves are installed in storage systems that are equipped with suction pumps and air eliminators; ` o o� • the ball is cracked or damaged; ; o • the ball float cannot be removed; a Q� • the orifice is not at the top of the assembly, or is clogged with debris or corroded, which would a prevent proper air flow after activation; m o • ball float valves are installed with coaxial Stage N I vapor recovery; ti • ball float valves are used on tanks equipped with remote -fill pipes and gauge openings without the use of "trap door" devices; or N • ball float valves are installed in storage systems that also are equipped with automatic shutoff 3 devices and the ball float valve is set to restrict flow before the tank is 95 percent full. If the ball float valve does not function as designed, flow restriction does not occur until the tank is more than 90 percent full, or the tank -top fittings are not vapor -tight, the ball float valve fails the inspection. NOTE: When permanently removing a ball float, ensure that the entire assembly is removed so as not to interfere with other methods of overfill prevention. 7.3 Overfill Alarms. 7.3.1. General. Overfill alarms provide an audi- ble and/or visible warning to the fuel delivery driver if the product level in the UST reaches the 90 percent level during a delivery. They are often an integral part of the automatic tank gauge (ATG) system. An overfill alarm does not stop or restrict product flow. 7.3.2 Purpose. The purpose of this inspection is to verify that the overfill alarm is operating cor- rectly and is set to provide a warning when the tank is no more than 90 percent full.