For drains that hold water, create a seal with a cup plunger. Plunge vigorously 10–15 times. If the water drains, flush again with the hose to test.
Pour 1 cup of baking soda down the drain, followed by 1 cup of white vinegar. Let it fizz for 30 minutes, then flush with hot water from a kettle or hose. clearing outdoor drain
Insert a garden hose into the drain as far as it will go. Turn the water on full blast. The pressure can dislodge soft clogs. If water backs up, stop and move to the next step. For drains that hold water, create a seal with a cup plunger