Simple Laundry Greywater System

In Southern California, we are dealing with water restrictions due to years of continuous drought and water shortages. Here is one way to start saving on irrigation water. Our washer is in the garage, so it is easy to run this set up out to the yard. It is working great for me and I am saving a ton of water on irrigating my ornamental plants and trees. I already had the trash can and a 3/4 inch garden hose, so this set up only cost me about $10 plus the cost of another 3/4 inch hose (about $30).

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

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)

Comments

[GrapeApe226]

Years ago, my friend made a system for watering his lawn and Italian cypress trees. They only used the rinse water and put the soapy wash water down the drain. After 2 or 3 years, the lawn was nice, no residue could be seen. They used city water to water the garden.

As for not letting it go where people can come in contact with any soap or sweat from your clothes, heck, they say your detergents are still there after washing and you sleep on your sheets and it gets absorbed into your skin. But that's why he did not put the wash water on the lawn, he didn't want bacteria from the wash on his lawn.

His washer was in the end of the kitchen. He could hear when the machine stopped its first spin and changed the hose over to his recycle tank which was an old galvanized wash pan with a garden hose going out the back door.

I have thought of this the last year, living in Los Angeles also. I like your idea about biogradable detergent and will try it. If it doesn't get my chothes clean as Tide, I'm going to the rince water only method. I'm not wearing grey clothes lol.

Great Instructable :)

[Calorie]

Nice job. I know that some septic systems use a sprinkler of sorts to increase aeration of a septic intake tank (if that makes sense.) I imagine it could be a problem with a barrel full of soap but a day's worth of aeration could help degrade and bind any chemicals that would otherwise give your lawn a headache (phosphates, nitrates, etc.) For the fun of it, you could also make a small scale marsh to discharge the water through.

But all of that is just icing. You've done a great job with a basic cake recipe. Reproducible, cheap and cheerful. Well done.

[sticklinster]

Grey water is not ideal for plants that prefer acid soil, rhodies, blueberries, etc because the soap will change the pH.  So use with moderation.  Also see greywater guerillas website for more info

[Dixiebitch]

I live on a mountain, and I use rain water caught in barrels for washing. I have an old wringer washer that just dumps out after I wash clothes. To save water, I wash loads according to degree of dirtiness, ending with jeans and other workclothes. After I am done, I save the grey water in a bucket and use it to flush my toilet. If you use homemade soap like me, or enviro-friendly store bought soap, It should be safe for city sewer systems.  I like the idea that you can use it on fruit trees--I have a huge blackberry patch on my property. Anyone know if it would be safe to use on the wild fruit?

[dartmouthguy]

Why not save the grey water as wash-water for a 2nd load. It washes the duds and gets pumped into the sewage. Then you save the rinse/grey water
as wash water for each load.

[desnotes]

 I've also been interested in using grey water and found this Instructable to be a simple start. I do have some questions on the 'rules' for using greywater.

• Why must grey water NOT be used on grass?
• Why must grey water NOT be allowed to go into storm drains?
• We have a large retention pond (several houses long). If grey water got in there, could it do damage? There are currently several varieties of fish and turtles that live in the pond.

Thanks for the information,

desNotes

[eli.lindner]

I think the reason for not putting it on your grass is it will be hard to water the grass without a sprinkler. For health reasons you shouldn't use a sprinkler device distribute greywater as it may be inhaled by a human.

[gardenResQ]

There is no reason why your grey water cannot be used on your grass if it is used immediatly and not stored for any length of time. If grey water is stored, it becomes a breeding ground for bacteria and could be a health risk. However if used immediatly it exits the home - its safe as long as there are no members of the family that are ill (upset gut etc) I like to use the example of a child playing in the bath. If you are happy with a toddler playing in his bath water and putting facecloths in his/her mouth - then its safe to irrigate with some 30 seconds later.

One of the reasons grey water should not be discharged into storm water drains is because it  contains phosphates ( which is found in common fertilisers). However phosphates cause algae blooms if grey water enters rivers and/or lakes. 

Grey water must be kept out of the retention pond. Phosphates and nitrates will be be harmfull to any life in the pond. We also use chemicals to clean our tubs and showers and these will also end up in the pond. Used in moderation in the home, this grey water will not effect your garden

Hope this helps 

[crossless]

You should have too some organic detergent I don't think plants will love that dirty water. Why don't you collect rain water it's cleaner? I think it's ok if you have checked all laws. :)

[ladygarnetoak]

always check your local laws on grey water - a friend of mine always uses one of the little round "sprinklers for distribution of her grey water

[cylonics]

I so want to do this, you've come up with the super simple version. I put a bucket under the outlet hose in the sink that our washer drains to and fill up on rare occasion. The big thing is converting enough of your household needs to use greywater to get a good return on investment. I suppose water restictions would make this very worthwhile. Simple is better. Nice...