Knowing when to use this pump is important to the performance of this machine. As with all Geoprobe® tools and equipment, it's important to remember Team Geoprobe is ready to answer any question you may have about tool/machine usage.

GP350 Grout/Injection Machine

gp350 Customers wanted a machine with similar features as the GP300 Injection Machine, but without the GP350’s weight ( 5 lb.). Weighing less than 150 lb., the GP350 can be loaded for transport by two people, and can be easily maneuvered around a project site by one field person. The machine was designed to inject remediation materials or for bottom-up grouting through small diameter probe holes. The GP350 is also capable of delivering standard ASTM grout mixes, and, based on the power source, provides operating pressures up to 1,850 psi with a maximum flow rate of 5 gpm. The machine is powered using auxiliary hydraulics on the Geoprobe® machine, so it’s adaptable for use in the field with multiple machines.

GP350 Features

The GP350 package
includes Hydraulic Supply
Return Hoses, & 12V
Power Cord (ASM #32659)

-- Small, light-weight package
-- Designed for Injection of Remediation Materials
-- Grout Probe Holes from the Bottom Up
-- High Pressure enables Grouting by Small Tremie Tubes
-- Easy to Disassemble for Cleanup
-- Dual Reciprocating-type Piston Pumps
-- Few Replaceable (wear) Parts
-- Operates on Auxiliary Hydraulics
-- Use with Multiple Geoprobe Units
-- Speed Control on Injection Machine
-- Optional Vitron seals for pumping harsh Remediation Materials

Specs

Weight (without grout)	145 lbs.	66 kg
Height	29.8 in.	757 mm
Width	20.6 in.	523 mm
Length	38.7 in.	983 mm
Hopper Capacity	12.75 gal	48.3 L
Hopper Capacity (3 in. freeboard)	9.5 gal	36 L
Pump Pressure Rating	13 cu. in	213 mL
Pump Flow Rating*	1400 psi	96.5 bar
Pump Flow Rate*	0-5 gpm	0-18.9 Lp
*Dependant on Hydraulic Power Source