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

Cherne Part Number	610-188
Pipe Size Range	12"-18" w/ Sleeve
Bypass	None (full blockage)
Max Back Pressure	15 PSI / 35 ft.
Inflation Pressure	45 PSI
Body Material	Premium natural rubber, aluminum end plates
Sleeve	Abrasion-resistant protective sleeve included
Operating Temperature	0°F to 125°F

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.

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