Any simplified rainwater designs for loo's nowadays?

[Mr Gus]

Owt changed?

I'd like to be able to divert some roof run off (near a loo) to my downstairs WC but have a feeling the same old grey water near a potable is still a no-no? ..considering when this was last discussed on a forum in a galaxy far far away have things changed in light of climate urgency?

[Stinsy]

As far as I know BS8525-1:2010 is still in effect, unchanged. My understanding is that so long as any taps are labelled all is good. I don’t think you’re allowed to use grey water for hand washing, that is a dealbreaker for many toilet use-cases because the need to run portable and grey makes it too expensive.

[nowty]

I installed a completely separate pressure pumped plumbing supply to my toilets and outdoor garden taps. If it goes wrong, I can re-connect the upstairs toilet by physically disconnecting the grey water pipe and reinstating the original potable water supply. I think that is enough to abide by the regulations as the supplies remain completely seperated.

Maybe I need to label the outdoor taps as non potable water.

[Mr Gus]

If that is deemed acceptable then that is indeed doable, no cited concerns about interchanging the two from a microbial aspect?
(I was under the impression there would need to be two water inlets & proximity of one to the other was part of the concern? ..hope i'm wrong)

[nowty]

The main issue is to prevent backflow from the greywater system to the potable system which is what I have implemented.

Good simple info found here.
https://www.eswater.co.uk/globalassets/ ... advice.pdf

And some other info from the Environment Agency, found here,
https://sswm.info/sites/default/files/r ... 0Users.pdf

Looks like I am OK, apart from needing to colour code the pipes and add various labels to things.

Another job to add to the long term "To Do" list.

[Mr Gus]

Thanks nowty, I'm currently clearing my back garden (Bee & blackbird heaven) as we gave it over when the local bird songbird populace went into decline, having seemed to recover over a 10 year period i'm hacking it back to its original purpose which will likely involve a few 000 litres of water storage my loo is fittingly close & as it is my own personal jump off point for a visit to the spice islands I don't think i'll get complaints

[Joeboy]

Remotely related. We used toilets similar to these in Japan. Have a dump, wash hands, hand water fills cistern for next customer.

https://www.wholesaledomestic.com/combi ... zwQAvD_BwE

[nowty]

Remotely related. We used toilets similar to these in Japan. Have a dump, wash hands, hand water fills cistern for next customer.

https://www.wholesaledomestic.com/combi ... zwQAvD_BwE

Wow, thats such a good idea and so simple, especially in terms of plumbing.

[Stinsy]

I saw those in Japan. Seemed elegantly efficient.

[Joeboy]

I saw those in Japan. Seemed elegantly efficient.

Many kinds.

https://www.familyhandyman.com/article/ ... ves-water/