Roebic K-67 Granular Bacterial Drain & Trap Cleaner 1 lbOrganic debris can build up in household drains and traps, which may lead to slow draining kitchen sinks, bathroom sinks and tubs. Left untreated this buildup will cause clogs and back ups. Keep your drains and traps running freely with a regular application of K 67, a powerful non corrosive and natural drain cleaning product.