Outdoor Drain Cleaner 400ml. Duzzit Drain Unblocker Drain Away Outdoor 400ML is a powerful solution designed to effectively clear outdoor drains and pipes from blockages caused by grease, hair, leaves, and other debris. Its fast-acting formula ensures that your drains remain free-flowing, preventing potential flooding and foul odors. With an easy-to-use application, this drain unblocker tackles the toughest clogs, saving you time and effort in maintaining your outdoor drainage system. Suitable for use on various external drains, gutters, and pipes, Duzzit Drain Away Outdoor is an essential product for households and businesses alike, providing a cost-effective and convenient solution for outdoor drain maintenance.