If your yard floods during even a moderate amount of rain or water tends to stand for long periods of time, you may need to install catch basins that capture and drain the water. The project isn't difficult, and you will be surprised at well a simple drain system will work at reducing the volume of water. Here is what you need as well as how to install the drain:
Materials and tools needed
- 3-inch corrugated drain pipe
- 9-inch by 9-inch catch basin
- Drain grate designed for 9-inch by 9-inch basin
- 4-inch universal catch basin outlets
- One-inch diameter gravel
- Torpedo level
- Line level, string & stakes
- Hack saw
Step-by-step installation directions
1. Select a location for the catch basin—The catch basin is designed to serve as a central collecting point for water in your yard. For maximum effectiveness, place a catch basin in the deepest area of standing water; the number of catch basins used is up to you, but keep in mind that having more basins will drain the yard faster, and having additional basins in service provides you with backup in case clogs develop in the other one(s).
2. Install the catch basin—Once you have selected the location for your catch basin, dig a hole approximately 12-inches square and 18 inches deep. Next, pour a 6-inch layer of one-inch diameter gravel into the bottom of the hole, then lay the catch basin on top of the gravel. Be sure to level the top of the catch basin by adjusting the slope of the gravel layer, if necessary. After you are satisfied with the orientation of the catch basin, pop the drain grate on top of the basin. If you decide to install more than one catch basin, repeat this process for each one you decide to place in your yard.
3. Route the drain line—After the catch basin is installed, decide where to route the water runoff that will be exiting the basin. Basins contain multiple openings that allow you to install 3-inch corrugated drain pipe on several sides, so this should provide plenty of flexibility in placement.
Keep in mind the water should be routed to a convenient location where it will not disturb existing landscape or cause damage to structures or environmental features. Never direct yard drainage water into a sanitary sewer system, as it is not designed to handle the sheer volume of stormwater. Ultimately, many homeowners direct water into a nearby storm sewer drain or onto a paved street or slab.
In addition, be sure the exit is at a lower point than the bottom floor of your catch basin; if you aren't sure, you can measure this dimension by using a line level and string tied between stakes placed at each end of the system. If you are unable to route a drainage line to an exit point lower than the catch basin, then consider having a plumber install a sump pump drainage system in your yard to lift the water up and out of the low spot.
4. Install the drain line—Once you make a decision about where to route the drain line from the basin, the next step is to dig a trench leading away from each basin. Dig the trench 12 inches deep and 4 inches wide with a shovel or spade. Try to keep curves and bends as gentle as possible to avoid creating areas where water flow is slowed by the friction in turns.
Next, attach one end of the corrugated drain pipe to the end of a catch basin outlet and attach the outlet to the basin itself. The assembly should simply snap together; if done properly, the connection will not require any additional support or reinforcement.
Lay the drain pipe into the trench beginning at the catch basin and run it along the bottom of the trench toward its exit point. Finally, cut the drain pipe at its exit point using a hacksaw, and back fill using soil along the entire length of the drain pipe and around the catch basins.
For information or assistance, contact local plumbers or sewer experts in your area.