Cherne 4" Muni Ball Plug, 3/4" Bypass

The Cherne 4" Muni-Ball Plug (part #262-048) is a pneumatic bypass plug for 4" sewer and drain pipe — the most common residential sewer line size. The 3/4" tank valve bypass allows controlled flow during DWV testing. Rated for 22 PSI / 50 ft. head pressure at 40 PSI inflation. Natural rubber inflates to seal pipes from 3.25" to 4.25" ID.

Key Features

• 3/4" tank valve bypass — controlled flow-through during sewer and drain testing
• 22 PSI / 50 ft. head pressure — rated for sewer air and DWV testing
• Pneumatic inflation at 40 PSI — natural rubber seals round and out-of-round pipe
• Tether-bar compatible — holds to full head pressure with tether bar
• Natural rubber — durable construction for sewer environments

Technical Specifications

Applications

Sewer air pressure testing with controlled bypass flow, DWV code compliance testing, municipal sewer main isolation, storm drain testing, and pipe repair work requiring temporary flow control. The bypass allows water to pass through the plug during testing rather than building up behind it. 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.