Standing water in your yard can kill your grass and other plants, ruining your landscape. It can also be a health hazard, harboring mosquito larvae and other pests. If you have a problem with poor drainage, you can correct it with a little work and some simple tools.
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Before beginning any excavation, call 811 to check for underground utilities.
Locate the basin at the lowest point in the area to be drained.
Locate the outlet in an area that will be able to handle the added water. The outlet should be at least 1 1/8 inch lower than the basin for every 10 feet of distance between the basin and the outlet. That's roughly a 1-foot drop for every 100 feet of length or a 1% slope. If using a corrugated pipe, it is recommended that the outlet be 2 1/4 inches lower than the basin for every 10 feet.
Starting at the spot designated for the outlet, dig a 12- to 18-inch deep by 8-inch wide trench to the spot designated for the basin. The trench should have a consistent slope from beginning to end. Be careful to keep the trench bottom flat so you don't have high spots in the corrugated pipe that may hamper the flow of water.
Drill a 1/4-inch hole in each corner of the bottom of the catch basin. Before installing the basin, place 6 inches of gravel under the basin to eliminate standing water.
Dig a hole for and install the basin and basin grate. The basin grate should be flush with or slightly below the surrounding grade.
Connect the corrugated pipe to the basin outlet and place the pipe in the trench.
Test the drain by running water into the basin with a hose. If the system doesn't drain, adjust the trench.
Many pipe connections in landscape drainage, including those to catch basins, are not designed to be watertight. When testing the system, it will leak. Once you backfill the trench and area around the basin, the soil will seal the connections.
Secure hardware cloth to the outlet end of the pipe to keep small creatures from nesting in and clogging your drainage system.
Backfill the trench.
Place gravel or pour a small concrete pad immediately adjacent to the outlet to disperse the water and inhibit erosion.