The balanced design of the ChemGrout CG-550 allows continuous mixing and pumping of neat cements, bentonites, non-shrink grouts, cement/bentonite, cement/sand, non-shrink, self leveling and most packaged grout mixes. The CG-550 grout pump comes with either 2C4 or 3C4 progressive capacity pump, which gives an output of 8 gpm at 174 psi or 261 psi respectively. The heavy duty grouting work horse features a 45 gallon mixing tank and 10 gallon holding hopper, thereby offering exceptional productivity, low maintenance and quick payback.