@GwenfarsGarden I don’t think I fully understand - might be my English failing me... what’s the advantage of this system over catching rainwater and using that in the garden? And if you do dishes (assumably by hand) the soap rests are filtered out by this system, but at some point it’ll be saturated?

@whakkee catching rainwater is just that and it doesn't need any filtering. With greywater harvesting, you are trying to recycle dirty water, which you may then use in the garden.

You can just pour dishwater straight onto the garden, but only if it's just a bit dirty and soapy. If it's got lots of grease in it, you wouldn't want to pour that onto the garden, you would want to clean it first, via a system like this. An area could get saturated if the greywater system was in very heavy use. That's why I mentioned in fig 15 about building higher off the ground so you could collect the filtered water in watering cans, then distribute it more evenly across the garden instead of just letting one area get saturated.

Is this clearer?

I've just updated Fig 15 to mention the saturation issue, because your question has made me realise I should address that.

@GwenfarsGarden ah yes, now I get it! Thanks for the explanation! I think I’ll stick to catching rain water in a barrel for now (from the roof of our new garden house - even with the drought of last summer we didn’t need much tap water. Once I expand my gardening activities, this may be a good addition!

@whakkee I've updated the post explaining this more at the beginning. Questions help me write a better blogpost :)

@GwenfarsGarden you mention that you took the PDC. how was the experience? what kind of time commitment did it require? I'm interested but don't really know enough about what it entails.

@dthompson It was a wonderful experience doing the full PDC and wouldn't hesitate recommending it to people. In all kinds of ways I use a lot of what I learned in daily life. I found it a really positive and hopeful experience.

In order to get the certificate, a complete course is around 98 hours in total. Some courses are run for a solid two weeks, but for ours, it was one weekend a month for about 7 months, which I think made it more accessible, because 2 solid weeks is a big commitment that not many can make.

You also complete a full design as part of the process, which you present to the class and get feedback - it's a good way of really solidifying what you've learned.

@GwenfarsGarden thanks for the info! I take it that this course was located close to home?

@dthompson Yes, about a mile away from my house! It was serendipity in that I'd just started to work for the community garden where the course was being run.

We had people on the course (in Oxford) from nearby towns, but also from London and other counties. There was clearly a yearning for a PDC run this way.

@GwenfarsGarden how convenient! I don't know if anything will ever crop up near enough to me, but Paradise Lot hosts "work days" from time to time where you can do a bit of work there and learn from them. I think that will be worthwhile.

@dthompson that can be a great way to learn, as you learn by doing. At the community garden, when we were doing things like putting on a green roof or building the clay puddled pond, we'd put a call out for volunteers, which was usually popular because we got help and they got to learn.

@GwenfarsGarden sorry if this is an obvious question but is it ok to use greywater and stuff on plants you are planning on eating?

@echomoon this is a good question because it isn't obvious if you don't know.

If it's just generally dirty soapy water, yes, but I wouldn't put really greasy water on plants as that wouldn't be so good.

If it's food you are about to harvest, then you would rinse it as usual before using.

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