Overfill prevention verification.
Flapper valves, ball float valves, and overfill alarms under EPA 40 CFR 280.31. PEI RP1200 C-5 and C-6 forms, every device type present tested.
Manufacturer-certified · EPA 40 CFR Part 280 · Testing tanks since 1997
Three EPA-recognized overfill prevention device types: flapper valves (shutoff at 95% capacity), ball float valves (restrict at 90% capacity), and overfill alarms (alert at 90% capacity).
How we run it.
Overfill prevention testing follows PEI RP1200 Section 7. Each device type present at the site is tested.
Flapper valves: remove the drop tube, visually inspect the shutoff valve and float mechanism, manually move the float to confirm free movement, and use the manufacturer’s procedure to verify shutoff at no more than 95% tank capacity. Ball float valves: remove the ball float assembly, inspect the ball and cage for damage, cracks, and corrosion, check the vent orifice for clear flow, and verify flow restriction at no more than 90% capacity. Ball float valves can no longer be installed on new systems, but existing installations remain compliant.
Overfill alarms: compare the ATG console reading to a gauge stick, verify the alarm setting is at no more than 90% full, move the fuel float upward until the overfill alarm triggers, and measure the distance to calculate the percent-full at trigger.
- Equipment
- Drop-tube removal tools. Tape measure or gauge stick. ATG probe access tools.
- Frequency
- Every three years, per device type present.
- Deliverable
- An audit-ready overfill prevention test record covering each device at the site, sent after the visit. It documents that your flapper, ball float, or alarm triggers at the required level. PTTI prepares the record; your operator files it with the state.
What we look for.
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1
Flapper valve disabled
The mechanism damaged by operators trying to allow more product, or by corrosion. Usually requires replacement.
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2
Ball float cage corrosion
Metal seats or balls corrode or deform; the vent orifice clogs.
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3
Alarm console programming drift
The console-programmed value disagrees with the measured trigger point.
Frequently asked.
How often does overfill prevention need testing?
Every three years, per device type present at the site, under EPA 40 CFR 280.31. PTTI bundles it with the rest of the containment-tier testing where the cycles line up.
What is the difference between a flapper valve and a ball float valve?
A flapper valve shuts off product flow at no more than 95% tank capacity. A ball float valve restricts flow at no more than 90% capacity. PTTI tests whichever device type is present, plus any overfill alarm.
Can ball float valves still be used?
Ball float valves can no longer be installed on new systems, but existing installations remain compliant and PTTI tests them in place, verifying flow restriction at no more than 90% capacity.