Condensate/water drain tubes for CAREL humidifiers During the normal operation of steam distributors, condensate forms and it needs to be discharged with a special 10 millimeters diameter tube.Likewise, with isothermal humidifiers, water is drained with a special 40mm diameter rubber tube, resistant to temperatures up to 100 °C.On the table below are listed the order and use for your Carel humidifier. Condensate/water drain tubes Available codes Code Article description Diameter Compatible with 1312368AXX CONDENSATE DRAIN TUBE 10 millimeters DP* and SDPOEM00* 1312357APG WATER DRAIN TUBE 40 millimeters (pc. of 1 m) UE*, UR*, CH* and UG* Attention: when ordering, pay attention to the desired length in meters.