Storage, homogenisation and dosing system of substances able to precipitate or aggregate comprising at least one tank (20) for storage and a valve (40) for dosing. The at least one tank (20) comprises a tubular portion (21), a bottom (22) and a cover (23).The at least one valve (40) is housed near to the bottom (22) of the at least one tank (20) and the system also comprises oscillating support means for allowing a good homogenisation of the substances contained in the at least one tank (20).