Abstract: A downspout adapter includes a first part. The first part includes a mouth portion and a hollow structure extending from the mouth portion. The hollow structure includes at least one ratchet member and at least one recessed portion. The downspout adapter includes a second part configured for receiving the hollow structure therein. The second part includes at least one protruding member configured to removably engage with a corresponding recessed portion of the at least one recessed portion while the hollow structure is inserted within the second part. The second part includes at least one engaging member including an engaging end configured to selectively engage with a plurality of teeth of the at least one ratchet member while the hollow structure of the first part is inserted within the second part, thereby detachably coupling the second part with the first part.