A Super Simple Greywater in the Suburbs Plan

A Super Simple Greywater In The Suburbs Plan

Pretty watering cans?

After researching greywater do’s and don’ts (as summarised in this post) I discovered I could possibly heat our house a teeny bit, and save water, at the same time. The thought thrilled me. You know that I love to be efficient. You know that I love to save the earth and my money all at once. A super simple plan was beginning to form in my mind. But I needed watering cans. Four of them.

The creator of our beautiful caddies were contacted.

After a lengthy search on the internet I realised watering cans that were pretty and large and affordable at the same time were not to be found in South Africa. So I contacted Pascal, the creator of our clever caddies (unfortunately we do not sell them anymore…). Pascal and his co-workers make just about anything from tin and he once again did not disappoint. Four beautiful 10l watering cans arrived on my doorstep and we were ready to go.

Pascal did not disappoint!

And manpower of course

The super simple plan is this: You remember that hubby has us all bath in the same tub of water? We still do that. But here’s the change: instead of the last bather pulling the plug and having all that lovely warm greywater run down the drain, we leave it in the tub. Viola! The heat of the water gets transferred to the air, as well as much needed moisture. Granted, it is not much heat or moisture, but because we have all our bedrooms together with doors that can be closed between us and the rest of the house, the area that needs heat and higher humidity is small. We have not put a heater on once this winter! And our youngest did not once suffer from croup as he used to every winter. Perhaps it was a warm winter and perhaps our son is outgrowing his croupiness, but perhaps our primitive plan DID have something to do with it. At no cost. Yeeehaaa! Besides, greywater has to cool down before you can use it in the garden.

Labour intensive.... yes

Next morning, my three darling children and I all take our watering cans, fill it from the bath and water the garden! As easy as that! No pumps! No electricity! And a shared chore is fun.

A shared chore is fun!

Greywater that is fresher and does not harm our plants

We also use our very own BODY to wash bodies and hair. All our ingredients fully biodegrade in less than 28 days. This way we know nothing in the water will hurt our plants or the soil in our garden. Also, the microbes needed to keep the organic material in the greywater from rotting fast, are the same microbes in all our soap. So we know the greywater will not stink quite so soon.

To be honest I don’t think we would go to the trouble in a wet summer. But during a very dry winter such as this, it works like a dream. Our roses really needed the extra water. And it would otherwise just have gone down the drain! Teaming with life makes sense.


So How Does One Do Greywater In The Suburbs?

So How Does One Do Greywater In The Suburbs?

No easy answers

Do you remember how we first got interested in grey water? Fear of the municipal account. Do you remember what made me realise it wasn’t going to be as easy as ‘pour it into a 25l drum and relax’? Fear of the hospital account! That drum smelled dangerously foul. The water went down the drain and I got started on an information hunt.

Sifting through all the information and misinformation on the internet took hours but I am grateful I did it. I happened upon this site and found excerpts from the book Create an Oasis with Grey Water by Art Ludwig. Art is an ecological systems designer with 35 years full-time experience in water, among other things. He seems honest and his information is free and complicated. No easy answers here! Which makes me trust what he says.

Art does not know I exist and I am definitely not earning anything from this post. I just want to share what I learned.

Screenshot from Art's website

Don't store greywater more than a day

Firstly, I learned that it is best not to store grey water for more than a day. The bad microbes in the water multiply making the water smelly and oxygen poor. A system that drains completely as soon as the water is cold, gives maximum benefit.

'24 hours is generally considered the prudent maximum time for storage. Since this is not enough time to, for example, store grey water from a time when irrigation is not needed to one in which it is, I find myself tuning designs to eliminate pooled grey water anywhere it occurs; just send it all straight to the soil. The fewer little anaerobic corners and pockets the better. My latest designs drain COMPLETELY…all the collection plumbing, distribution plumbing, and surge tanks (if any) slope at least 2% across their bottom surfaces.'

He carries on saying that in the case of treated grey water it could be stored longer. That means that if you use Mrs Martin’s HAND and BODY (or any of the other Mrs Martin’s products, for that matter) and collect the water from your basin, you could store it for longer before using it in your garden. The beneficial microbes in the soap will retard the process in which pathogenic or ‘bad’ microbes multiply and make the water black. I invite you to try : we have several clients who say their systems stopped stinking after switching to our detergents!

Don't expect to save money

Secondly, we will probably not be saving a lot of money. Good clean water is still cheap in South Africa.

A typical residential greywater system will save $5-$20 worth of freshwater a month, at best. (Update: That seemed like a small amount three years ago when this post was first written, but now at the end of 2020 $20 is R300 – who would not mind to save that per month?)

It could, however, make all the difference to your garden in a time of drought like we are experiencing now. If you are not allowed to irrigate your garden, using your greywater safely may save your plants! Just don’t use it on your azaleas or hydrangeas as acid-loving plants don’t appreciate greywater.

The simpler, the better

Thirdly, the simpler the system the better. Art goes as far as to say that the moment a pump is involved you might have a net negative influence on the environment due to the cost of materials, manufacturing and electricity needed. He sees something as simple as a bucket as a grey water system.

Toilets can be flushed with grey water by simply bucketing it from the bathtub/shower directly into the toilet bowl (not the tank, where it will fester). An added plus of reusing bathtub water in this way is that due to flush volume always being under direct intelligent control it is always less. Also, in cold climates you get a primitive but highly effective sort of greywater heat recovery as the bath water sits there and heats the house as it cools.

It was after reading this last sentence that my efficiency instinct kicked in. I started to smile inwardly. Could it be that I could be heating my house this winter and gaining water for the garden AT THE SAME TIME?

Well, how I applied all my new-found knowledge, is for another post. Can’t wait to tell you!

Until then