Deflection gauges (mandrels) are used to test flexible sewer pipe for out-of-roundness or deflection per ASTM specifications D3034 and F679. This testing ensures that flexible pipe has been properly bedded and backfilled (ASTM D2321) to give optimal performance.
Other gauges can get hung up – causing a deflection test to fail, even though the pipe is within tolerance. Sized to .02″, steel deflection gauge styles meet ASTM requirements.
Durable, zinc-plated construction resists corrosion
Conforms to mandrel sizing specifications—blade length is equal to or greater than the nominal pipe size
Nine-arm design ensures testing accuracy
Open design allows gravel and debris pass-through
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