Instead of sending the wash water down the drain. Pipe it out to the garden it's called gray water and has no nasty bacteria and is good for the garden and saves on the water bill. Just lay a plastic pipe from the washing machine outlet through the wall or have it portable out the door to the backyard after the washing is done pack it up and store it till next wash day. Watch your water bill drop as you wont need to use tap water to water that garden great for veggie garden too.