BRAND NEW HG Kitchen Drain Unblocker 1L Unblocks Drains & Prevents Blockages

In fact using HG Kitchen Drain Unblocker will actually boost the bacteria culture in septic tanks. For a blocked drain: Remove any water lying at the bottom of the basin or kitchen sink. Pour about 3 cupfulls (at least 300ml) of HG Kitchen Drain Unblocker down the drain.

eBay