Solvent cleaning-unit for washing and drying capillary-glass tube viscometers. This viscometer tube cleaner washes and dries up to 6 capillary tubes at a time. Stainless steel case with 6 independent regulation valves fitted with holding-down spring, air filters, pressure regulator and pressure gauge, to be feed from one external air source. The capillary tube cleaner has a 7.5 litre capacity internal solvent tank with level indicator. Protection cover in stainless steel and window check.