HG drain and plug unblocker is a product for unblocking a blocked drain pipe in a handbasin or shower trap. This liquid drain cleaner works thoroughly and effectively and does not affect plastic pipes. This drain unblocker liquid is a ready-to-use product, it does not need to be diluted, which means there is less chance of splashing. In addition to the 1 litre version, we also have a 500 ml version in our range.