Cherne ® I-Series Test-Ball ® Blocking Plug 12-18 in w/ Sleeve, 15 PSI

The Cherne I-Series Test-Ball 12"-18" with Sleeve (part #610-188) is the sleeve-equipped version of the 12"-18" I-Series blocking plug. The abrasion-resistant sleeve protects the natural rubber body during deployment through rough concrete manholes and pipe. Same 15 PSI rating and 45 PSI inflation as the standard model. Choose the sleeve version for repeated deployments in abrasive conditions.

Key Features

• I-Series premium construction — natural rubber bonded to aluminum end plates with full body cording
• Multi-size coverage — one plug covers multiple pipe diameters
• 15 PSI / 35 ft. head — rated for sewer air pressure testing
• Full blockage — complete shutoff, no bypass
• Abrasion-resistant sleeve — protects body during manhole deployment
• 3/4" eyebolts + field-replaceable pressure relief valve (larger sizes)

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.