Rarely used drainage systems, for example in holiday homes, should be protected with a matching odour trap. Suitable models include the odour traps KERDI-LINE-GTO and KERDI-DRAIN-R 10 GT, which can be combined with virtually all KERDI-LINE drainage systems (except for KERDI-LINE-F/-VS/-VOS). All odour traps also include a waterless odour seal, which can also be purchased separately as the spare part KERDI-LINE-GTM.