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Cherne ® I-Series Muni-Ball ® Enchufe 8-16 in c/ 2 de derivación
The Cherne I-Series Muni-Ball 8"-16" with 2" Bypass (part #312-168) is a premium multi-size pneumatic bypass plug covering 8" through 16" sewer and storm pipe. The 2" bypass handles high...
$ 1,066.01
Cherne ® I-Series Muni-Ball ® Enchufe 8-12 in c/ 2 de derivación
The Cherne I-Series Muni-Ball 8"-12" with 2" Bypass (part #212-128) is a premium multi-size pneumatic bypass plug for 8" through 12" sewer pipe with a larger 2" bypass for higher...
$ 819.19
Cherne 1 1/2" Cherne Muni-Ball Plug, 1/8" Bypass
The Cherne 1-1/2" Muni-Ball Plug (part #262-008) is a pneumatic bypass plug for 1-1/2" plumbing pipe. The 1/4" NPT male bypass allows controlled flow during DWV testing. Rated for 22...
$ 171.02
Cherne ® I-Series Muni-Ball ® Plug 12-24 in w/ 3 de derivación w/ Sleeve
The Cherne I-Series Muni-Ball 12"-24" with 4" Bypass and Sleeve (part #654-248) is the heavy-duty version of the 12"-24" I-Series bypass plug — featuring a larger 4" bypass for maximum...
$ 2,431.26
Cherne ® I-Series Muni-Ball ® Enchufe 12-18 in c/ 3 de derivación
The Cherne I-Series Muni-Ball 12"-18" with 3" Bypass (part #214-188) is a premium multi-size pneumatic bypass plug for 12" through 18" sewer pipe. The 3" bypass provides maximum flow-through for...
$ 1,618.36
Cherne ® I-Series Muni-Ball ® Enchufe 4-8 in c/ 3/4 de derivación
The Cherne I-Series Muni-Ball 4"-8" with 3/4" Bypass (part #311-088) is a premium multi-size pneumatic bypass plug for 4" through 8" sewer pipe. The 3/4" bypass allows controlled flow during...
$ 681.77
Cherne ® I-Series Muni-Ball ® Enchufe 12-18", 3 de derivación, Manguito
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...
$ 2,123.73Repair Work Without Shutting Down the Line
Active sewer lines don’t stop flowing because you need to make a repair. A bypass plug seals the pipe at the work zone while routing flow through an internal channel to a temporary line downstream. Your crew works in a dry area; the sewer keeps running.
Sizing the Bypass Channel
This is the decision that matters most. The bypass channel diameter determines how much flow can pass through while the plug is set:
- 3/4” bypass — Low-flow residential laterals. Single homes, small-diameter service connections.
- 1” to 1-1/2” bypass — Residential mains and light commercial lines.
- 2” to 3” bypass — Municipal trunk lines, multi-family feeds, and higher-volume applications.
When in doubt, size up. An oversized bypass won’t cause problems, but an undersized one risks sewage backup behind the plug.
Blocking vs. Bypass — Quick Reference
Use a blocking plug when the line can be fully isolated (pressure testing, smoke testing, new construction). Use a bypass plug when flow must continue during the work (repair, replacement, spot lining).
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How do I choose the right bypass size?
Match the bypass diameter to your expected flow rate. 3/4” for single residential laterals, 1”–1.5” for residential mains, 2”–3” for municipal trunk lines. Size up if unsure — excess bypass capacity won’t hurt, but insufficient capacity causes backup.
Can I use a bypass plug for pressure testing?
No. Bypass plugs have an open channel by design — they can’t hold pressure. For pressure testing, use a blocking plug (Test-Ball) that creates a complete seal.
