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The big design manual recommends keeping two cisterns, one soft, the other hard.
Soft water is slightly acidic, and great at dissolving minerals, soap, etc. It's great for washing, but it would also tend to deplete your bones & teeth if you drank it. It also tends to pick up heavy metals from plumbing and other surfaces it might encounter.
Hard water is the reverse: helps build up skeletal, dental, nervous health, but leaves a soap scum and mineral deposits on whatever you wash with it.
Rainwater is naturally soft, and pollution has made it even more so. The soft cistern doesn't need any extra effort.
Hard water can be made by adding a bag of limestone chips to the cistern. The water drops off any heavy metals at the surface of the limestone, and picks up calcium as any acidity is neutralized.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.
Eating calcium-rich foods like leafy greens or dairy is enough to supply what soft water lacks. Dietary calcium also helps your body to handle any dose of heavy metals, past or future. But I think it would theoretically be better to have a non-softened tap for your drinking water.
I have read that sodium in irrigation water can become a serious problem, especially if evaporation exceeds precipitation. It should be easy to figure the amount of sodium you're adding to the soil by dividing your rock salt consumption by your water consumption, and multiplying back the volume of irrigation water.
In dry climates it might make sense to use chemically-softened greywater for irrigation of only salt-tolerant plants like asparagus, beet, and barley, and set aside other plots for irrigation with stored rainwater or hard municipal water.
"the qualities of these bacteria, like the heat of the sun, electricity, or the qualities of metals, are part of the storehouse of knowledge of all men. They are manifestations of the laws of nature, free to all men and reserved exclusively to none." SCOTUS, Funk Bros. Seed Co. v. Kale Inoculant Co.
Leila Macbeth wrote:
As long as your roof and storage system are suitable for potable water, rainwater is good for averything
Would it be a horrible idea to consumer rainwater collected from a standard sort of shingle roof? I'm just renting a house right now and wonder if the water would be usable. The alternative is well water that goes through a water softener.
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In rural Australia water tanks catching water from the roof is the norm. I get the feeling it is less common in the US for some reason.
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Mains water is treated with several chemicals like chlorine , fluoride. Who knows what this does to you if you consume so much chlorine over years?. What is if chlorine reacts with the metal of the pipes? I'm not firm in chemistry, maybe someone is more knowledgeable.
If you drink rainwater you should keep your gutters clean. and a dark tank seems to be better. You can build a first flush diverter out of usual PVC pipes: your outlet of the gutter is the diverter. You cut it off above the ground, maybe 20 cm and put a screwable lid on it. Poke a hole into the lid. On the top end of the "downpipe" insert a t and a knee and this is the pipe to the tank. So first the rainwater goes into the "downpipe" with all the dirt. Only when this downpipe is filled up clear water goes to the tank. You should open the lid every now and the to leave the dirt out.
ediblecities wrote:
If you drink rainwater you should keep your gutters clean. and a dark tank seems to be better. You can build a first flush diverter out of usual PVC pipes: your outlet of the gutter is the diverter. You cut it off above the ground, maybe 20 cm and put a screwable lid on it. Poke a hole into the lid. On the top end of the "downpipe" insert a t and a knee and this is the pipe to the tank. So first the rainwater goes into the "downpipe" with all the dirt. Only when this downpipe is filled up clear water goes to the tank. You should open the lid every now and the to leave the dirt out.
Do you have a picture of this? I think the picture in my head isn't right. But it sounds like something I could add on to a rented house as long as I was willing to put it back the way it came when I leave as the cost wouldn't be more than a couple pieces of drainpipe.
It goes under neath the house and then up to fill the tank. This is not the best you can do as you may have standing water in the tubes,
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i want to since we get plenty of rain use it and a unground or under basement polyethelene tank or 2 with a filter and uv filter tween the 2 tanks.
also as for my own use i would opt for ABS over pvc pipe pvc is nasty stuff to be drinking from , i relize some peoples plumbing is made of pvc .. not mine lol
also clorine water + sanitizers = cloro dioxins
ediblecities wrote:
what does this mean "sanitizers" do they put sanitizers in the water?
You don't get anything else here than PVC.
According to the EPA;
Chloramines are disinfectants used to treat drinking water. Chloramines are most commonly formed when ammonia is added to chlorine to treat drinking water. The typical purpose of chloramines is to provide longer-lasting water treatment as the water moves through pipes to consumers. This type of disinfection is known as secondary disinfection. Chloramines have been used by water utilities for almost 90 years, and their use is closely regulated. More than one in five Americans uses drinking water treated with chloramines. Water that contains chloramines and meets EPA regulatory standards is safe to use for drinking, cooking, bathing and other household uses.
I built a small 12 x 12 X 4 ft gold fish pond with shelves and water plants for my aunt to enjoy several years ago. It collects rain water from one portion of the roof where there is a valley from the porch and drops into the pond (creating a grotto effect). It usually fills it to overflowing. I also built a dry stream bed where the over flow that then waters a bog garden, my fruit trees and many other plants that I added specifically to that location before finally draining off to a ditch and on to the local river. I wanted as much as possible to stay on the property and be used for plants.
There are many uses for collected rainwater; the same ones for other sources of water obtained in any other way.
rbrgs wrote:
Lots of people in Puna (Hawaii) live on catchment. I've been washing dishes and clothes and people with rainwater for 25 years.
When I lived on Opihikao Rd (Pahoa, Hawaii) dishes, clothes, myself, and watering of plants was all rainwater. We also built a system with a 4x7ft glass window, with 6inch walls around it, pitched at a slant, with a rainwater barrel underneath it for drinking.
I never had the water Ph tested (nor anyother testing), however it tasted super fresh and clean!
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Anonymous wrote:We drink our rainwater, unfiltered and no chemicals added. Nothing tastes finer
We're a family of four and all the locals do the same as we have no other source of water. Obviously we bathe in it too.
In rural Australia water tanks catching water from the roof is the norm. I get the feeling it is less common in the US for some reason.
does anyone know what types of roofs are common in rural Australia? I was considering drinking the water off our roof put we have asphalt shingle roof and was worried about the chemicals from it. Would this be a bad idea to do with this type of roof? If so is there a solution?
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I have a property in NE Arizona, Navajo country. Curiously the tribes do not have a lot of rain catchment history. The old tribes (anasazi?) did build catchment ponds though.
I don't have many neighbors out there but all of us plan on catchment as our water source. I plan on using those 250 gallon totes. I have done a lot of offshore sailing. I know all about conserving water.
Four years ago I spent the summer there. My truck broke down and the freeway is 25 miles away. There is no traffic on my dirt roads (zero). Riding a bicycle was sometimes impossible on the sandy streaches.
One week I walked three miles to a cattle tank to get four gallons. I filtered and boiled the water but it still tasted of algae. I made iced tea.
Years later the cattle tank is empty and I look into it. Lots of bird skeletons. Yum.
I did learn something that was important to me, certanly attitude changing. I had to hitchhike at the freeway onramp. It wasn't white people giving me rides, it was Navajo. Once two women took me 50 miles to Gallup, NM. One woman took me miles into the desert on some very lonely roads. Who are these people

Am I off subject enough?
Aaron Dailey wrote:
does anyone know what types of roofs are common in rural Australia? I was considering drinking the water off our roof put we have asphalt shingle roof and was worried about the chemicals from it. Would this be a bad idea to do with this type of roof? If so is there a solution?
Here's what I found on this from another site:
This is a quote from the Texas Manual On Rainwater Harvesting:
"Composite or asphalt shingle due to leaching of toxins, composite shingles are not appropriate for potable systems, but can be used to collect water for irrigation. Composite roofs have an approximated 10-percent loss due to inefficient flow or evaporation (Radlet and Radlet, 2004)."
You can download the whole thing, and a lot of other practical rain water harvesting stuff here:
http://www.builditsolar.com/Projects/Water/Water.htm
I collect from a steel roof and am searching for whether or not I can wash dishes with water collected from the steel roof if I have only a 20 micron and 5 micron filter between the cistern and my sink. Anyone with help here would be appreciated! Thanks!
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Catherine

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