Provides a seal for the newly installed pipe in preparation for air pressure ejection of spoils left within.

plate
Part Number Pipe Size (In) Wall
07105804 4 – Sch 40 .237
07105806 6 – Sch 40 .280
07105808 8 – Sch 40 .322
07105810 10 – Sch 40 .365
07105812 12 – Std .375
07105814 14 – XS .500
07105816 16 – XS .500
07105818 18 – XS .500
07105820 20 – XS .500
07105824 24 – XS .500
07105830 30 – XS .500
seal off

Safety Stake

Installed as an added precaution to prevent seal-off plate from dislodging from pipe when pressure is applied.

Part Number Pipe Diameter
07140000 Below 18″
07140050 20″ & up

GRUNDORAM® Access Seal-off Plate
GRUNDORAM® Access Seal-off Plate

The blow out procedure. WARNING: Pressure plate must be secured with Safety Stakes as specified in the Operators Manual. Refer to Operators Manual for complete instructions concerning this operation. No personnel are to remain in exit or starting pit during soil removal procedure.