Zep Drain Bioclean & Odour Control - 1l, Drain Unblocker For Preventive Mainten
Maintenance: Pour 30–60ml down the drain every two weeks. Blocked Drain: Pour 500ml, then 500ml of warm water. Wait 6–8 hours (preferably overnight) before use. Keep your drains fresh, clean, and clog-free the easy, eco-conscious way!