The Cherne I-Series Muni-Ball 12"-18" with 3" Bypass and Sleeve (part #613-188) is the sleeve-protected version of the 12"-18" I-Series bypass plug. The abrasion-resistant sleeve extends plug life during deployment through rough concrete manholes. Same 3" bypass and 15 PSI rating. Choose the sleeve version for repeated deployments on large-diameter municipal mains.

Key Features

• I-Series premium construction — natural rubber bonded to aluminum end plates
• 3" bypass — controlled flow-through during testing
• 15 PSI rated — for sewer air pressure testing
• Pneumatic inflation — natural rubber seals round and out-of-round pipe

Technical Specifications

Applications

Municipal sewer air pressure testing, storm drain isolation, large-diameter pipe testing during construction and repair, and compliance testing on trunk mains. Always follow Cherne inflation and back-pressure guidelines.

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.