Cherne® 8 in. Single-Size Underground Test-Ball® Plug
Estimated delivery Jul 28 – Jul 30· freight quoted separately
- Volume / custom config? Call (866) 514-3684 or request a quote
Description
The Cherne 8" Single-Size Underground Test-Ball (part #041-386) is a pneumatic blocking plug for sanitary and storm sewer testing. Natural rubber inflates to block flow in 8" pipe (usage range 7.00"–8.25" ID). Rated for 17 PSI / 40 ft. head pressure at 25 PSI inflation. The 3.9 lb plug features a 1/4" inflation thread for quick-disconnect fittings and a 3/8" eyebolt for poly-lift line attachment. Designed for underground sewer air tests and back-plug applications.
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
- Full blockage — complete shutoff for sewer air tests and isolation
- 3/8" eyebolt — attach poly-lift line for manhole deployment and retrieval
- Natural rubber — durable construction for underground sewer environments
Applications
Municipal sewer air pressure testing, storm drain isolation, underground pipe blocking for repairs, and back-plug applications. Deploy through manholes using the eyebolt and poly-lift line. 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.
Specifications
| Type | Blocking Plugs |
|---|---|
| SKU | 41386 |
| Availability | Available to order |
| Bypass | None (full blockage) |
| Weight | 3.9 lbs |
| Body Material | Natural rubber |
| Deflated Length | 10.25" |
| Pipe Size Range | 8" |
| Deflated Diameter | 6.75" |
| Inflation Fitting | 1/4" thread (quick-disconnect compatible) |
| Max Back Pressure | 17 PSI / 40 ft. |
| Inflation Pressure | 25 PSI |
| Pipe Compatibility | All underground sewer and storm pipe types |
| Operating Temperature | 0°F to 125°F |
| Usage Range (pipe Id) | 7.00–8.25" |