Grout Master Diesel/Hydraulic Double Acting Piston Pump Stock # ST-030 *SOLD* SOLD Condition Used Year 2022 Email Us Call Us Details Condition Used Category Make Year 2022 Description Used/Refurbished. Similar size to ChemGrout CG600. 1 ea 70 gal mixer tank and 1 ea 70 gal holding tank. 16 gal/min and 500 psi max grout pressure.