Home Solutions Shoring & Trench Safety Test Plugs Low Pressure blocking plug
Cherne Test-Balls now feature patented Rupture Disc Technology, designed to prevent over-inflation and protect the plug’s internal cording from damage.
Cording damage is often hidden but can significantly reduce plug performance—Rupture Disc Technology helps eliminate this risk.
Built tough and reliable, Cherne Test-Balls deliver durable, effective performance in all types of pipe.
| Model Name | 3.5" - 4.5" | 5.0" - 6.5" | 8.5" - 10.0" | 11.0" - 12.5" | 13.5" - 15.5" | 16.5" - 18.5" | 18.5" - 21.5" |
|---|---|---|---|---|---|---|---|
| Model No. | blocking-plug-3-5-4-5 | blocking-plug-5-0-6-5 | blocking-plug-8-5-10-0 | blocking-plug-11-0-12-5 | blocking-plug-13-5-15-5 | blocking-plug-16-5-18-5 | blocking-plug-18-5-21-5 |
| Size Range(in) | 3.5"-4.5" | 5.0"-6.5" | 8.5"-10.0" | 11.0"-12.5" | 13.5"-15.5" | 16.5"-18.5" | 18.5"-21.5" |
| Size Range(mm) | 90-125mm | 125-175mm | 225-265mm | 275-325mm | 350-400 mm | 425-470mm | 475-550mm |
| Diameter(in) | 3.5" | 5.0' | 8.0' | 11.0" | 13.5" | 16.5" | 18.5" |
| Diameter(mm) | 90mm | 125mm | 200mm | 275mm | 350mm | 425mm | 475mm |
| length inch | 5.5" | 6.0" | 10.0" | 12.0" | 15.0" | 18.0" | 21.0" |
| Length(mm) | 140mm | 152mm | 254mm | 305mm | 381mm | 457mm | 533mm |
| weight(kg) | 0.67kg | 1.4 kg | 3.6kg | 5.6kg | 10.9kg | 15.5kg | 19.1 kg |
| Required Inflation (psi) | 25 | 25 | 20 | 20 | 25 | 25 | 20 |
| required inflation (bar) | 1.7 | 1.7 | 1.4 | 1.4 | 1.7 | 1.7 | 1.4 |
| Max Back Pressure air(psi) | 10 | 10 | 10 | 10 | 10 | 10 | 8 |
| Max Back Pressure Air(bar) | 0.69 | 0.69 | 0.69 | 0.69 | 0.69 | 0.69 | 0.55 |
| Max Back Pressure Water(ft) | 25 | 25 | 25 | 25 | 25 | 25 | 20 |
| Max Back Pressure Water(m) | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 7.6 | 6.1 |