Cherne® 4-6" Multi-Size Underground Muni-Ball® Plug 3/4" Bypass

The Cherne 4"-6" Multi-Size Underground Muni-Ball (part #265-048) is a pneumatic bypass plug covering 4" through 6" underground sewer and storm pipe in a single plug. Rated for 17 PSI / 40 ft. head pressure. The 3/4" bypass allows controlled flow during testing. Natural rubber inflates to seal pipe from 3.75" to 6.25" ID. Multi-size design eliminates the need to carry separate 4", 5", and 6" plugs.

Key Features

• Pneumatic inflation — natural rubber expands to seal round and out-of-round pipe
• 17 PSI / 40 ft. head pressure — rated for sewer air pressure testing
• 3/4" bypass — controlled flow-through during testing
• Multi-size coverage — one plug replaces multiple single-size plugs
• Natural rubber — durable construction for underground sewer environments

Applications

Municipal sewer air testing with controlled bypass flow, storm drain testing, underground pipe isolation during repairs, and construction acceptance testing. The multi-size design reduces the number of plugs field crews need to carry. Always follow Cherne inflation guidelines.

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.