Cherne ® 15-16 in. Single-Size Underground Test-Ball ® Plug

The Cherne 15"-16" Single-Size Underground Test-Ball (part #041-416) is a pneumatic blocking plug for large-diameter sanitary and storm sewer testing. Natural rubber inflates to block flow in 15" to 16" pipe (usage range 14.00"–16.25" ID). Rated for 13 PSI / 30 ft. head pressure at 25 PSI inflation. The 19.75" deflated length and 13.75" diameter require two-person handling and manhole deployment. Features 1/4" inflation thread and 3/8" eyebolt for poly-lift line.

Key Features

• Single-size design — optimized for 15"-16" pipe
• 13 PSI / 30 ft. head — rated for sewer air pressure testing
• Full blockage — complete shutoff, no bypass
• 3/8" eyebolt for poly-lift line, 1/4" inflation thread

Technical Specifications

Applications

Municipal sewer air pressure testing, storm drain isolation, large-diameter pipe blocking during construction and repair, and compliance testing on trunk mains. Deploy through manholes using eyebolts and poly-lift line. Always follow Cherne inflation and back-pressure guidelines — never exceed rated pressures.

Questions on sizing or bulk pricing? Call (866) 514-3684 or email us — same-day shipping on in-stock items, tax-exempt purchasing for qualified accounts.