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

plate
Part Number Pipe Size (In)
71058-04 4 – Sch 40
71058-06 6 – Sch 40
71058-08 8 – Sch 40
71058-10 10 – Sch 40
71058-12 12 – Std
71058-14 14 – XS
71058-16 16 – XS
71058-18 18 – XS
71058-20 20 – XS
71058-24 24 – XS
71058-30 30 – XS
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
71400-00 Below 18″
71400-50 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.