Cherne® PROVING RING, 10 IN. 7.5% Deflection, SDR 35

The Cherne® Proving Ring, 10 in., 7.5% Deflection, SDR 35 (part #73261) is a fixed verification ring used to confirm that a 10 in. SDR 35 deflection gauge (mandrel) is correctly sized to a 7.5% deflection specification. Passing the mandrel through the ring before testing proves the gauge dimension on site, removing any dispute over test validity.

Key Features

• On-site gauge verification — instantly confirms the mandrel meets the 7.5% deflection dimension for 10 in. SDR 35 pipe.
• Matched to SDR 35 sewer pipe — sized for the most common PVC gravity sewer standard.
• Supports defensible acceptance testing — gauge verification backs up deflection results under ASTM D3034-based specifications.
• No-maintenance design — a simple fixed ring with nothing to calibrate, adjust, or wear out.

Applications

Inspectors, municipalities, and sewer contractors use proving rings with deflection gauges when acceptance-testing newly installed flexible sewer pipe — verifying that bedding and backfill left the pipe within its allowed deflection.

Questions on sizing or bulk pricing? Call (866) 514-3684 or email us — we ship within the USA and welcome tax-exempt purchasing for qualified accounts.