Make sure you only use biodegradable laundry detergent labeled for greywater use. Also, there are a few more rules for using greywater so be sure to read those at the end of this instructable.
Step 1: Laundry Greywater Parts
5/8 inch spade drill bit
Garden Hose Adapter 3/4 " MH X 1/2" MIP- part is in the faucet section of Home Depot, not in the garden hose or irrigation area. (Watts brand A-663 GH3) http://www.watts.com/pro/_productsFull.asp?catId=68&parCat=2680&pid=6508&ref=2
'Faucet Rosette Washer and Nut (1/2" IPS) - Danco brand
3/4" diameter garden hose
Trash can (I think mine is 20 gall, but use a larger one)
Step 2: Cut Hole, Insert Garden Hose Adapter
Cut a hole in the bottom of the trash can using a 5/8 inch spade drill bit (I had to shave off extra to make the adapter fit)
Screw in the garden hose adapter (make sure the hose fitting side is on the outside of the trash can).
Step 3: Attach Washer/Nut
Secure adapter into hole with a Danco brand Faucet Rosette Washer and Nut (1/2" IPS) on the inside of the trash can. (I have not sealed it with any silicone, but I have no leaks).