Cherne® Single-Size Underground Test-Ball® Plugs are designed for blocking flow, allowing for maintenance in sanitary and storm sewer systems. These plugs may also be used as a back plug for sewer air tests. Cherne Industries is a global leader in pipe plugs, blocking and testing.
- Single-Size Underground Test-Ball® Plugs are made of natural rubber material for excellent expansion and memory
- Seals both round and out-of-round pipe
- Removable inflation valve can be replaced if damaged or replaced with quick disconnect fitting
- Features an eye-bolt for use with a poly-lift line
- Use to block flow or as a back plug for sewer air testing
- Available in multiple sizes
|Inflation Thread:||1/4 in. (1)|
|Inflation Pressure:||25 psi (1,7 bar)|
|Product Type:||Single-Size Underground Test-Ball|
|Chain Eye Bolts:||3/8"|
Available in 4 Variations
Maximum Back Pressure
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Cherne offers a 2 year warranty on all pneumatic plugs from date of manufacture, (plugs are post-dated by six months to allow for shelf time). If kept in controlled conditions (not exposed to sunlight and kept at temperatures between 0-125 degrees F) the pneumatic plugs remain in good condition for a longer period of time. Plugs should always be inspected for visual damage prior to every use.
What type of rubber is a Cherne pneumatic plugs made from?
All of Cherne’s pneumatic pipe plugs are made from natural rubber. The only exception is our yellow pillow plugs which are made from a polyurethane impregnated fabric.
How do I determine what size plug should be used?
The first step is to determine the ID (inside diameter) of the pipe that will be plugged, and then choose the plug that matches the ID of the pipe for that application. Some of our Cherne plugs can be used for multiple sizes of pipe, but they should only be used when the size range of the plug is being used on a pipe which falls within that range. When in doubt, call the customer service help desk.