The back sprayer has a 12 -liter translucent in robust plastic tank allowing to last over time. It has a polypropylene lance with adjustable nozzle, Viton® joint, a high power metal rod pump and integrated decompression valve. A transport strap is integrated into the sprayer. Practical and adjustable, it facilitates your trips. Good resistance to swelling in: oils and fats (as well as most additives), fuels and aliphatical and aromatic hydrocarbons, some difficulty flammable hydraulic fluids and synthetic oils. Is not compatible with: ketones (like acetone, methylcethylcetone), ester solvents (such as ethyl acetate, amines), as well as organic acids (such as acetic acid) Circulate clear water under pressure in the system until it is clear, rid of the dirt that could be in the tank, the pum.