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DIY Rainwater Catchment System
This post is part of the 30 Ways of Homesteading Round Robin.
33 of the Top survival, prepping, and homesteading websites pull together their best resources, to bring them to you.
Links to each day of the 30 Ways of Homesteading Round Robin articles are at the bottom of this post. One new article for every day of the month! Enjoy. 🙂
Rainwater Catchment System
Did you know that if you have 1,000 square feet of roof and it rains an inch or two one day, that one rainfall has provided you with 600-1,200 gallons of water falling from your roof?
Here’s how to make use of all that water!
WHAT YOU’LL GET BELOW
– Videos on how to build a rainwater catchment system
– Important things to avoid when building your system
– Methods of storing, testing, and purifying that water
Here we go!
In a SHTF scenario, having a rainwater catchment system will benefit you and your family in several obvious, and not-so-obvious ways.
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Obvious and Not-So-Obvious Benefits
We need water to drink, cook, bathe, clean, and grow crops, edible plants, and livestock. Obvious ways.
But if the grid goes down and stays down, how valuable will that rainwater catchment system, and all the potable water it provides, be?
The not-so-obvious benefits — your rainwater catchment system now becomes a power plant of value for you and your family, offering commodities and skills that others will NEED!
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This brings with it a host of other considerations, like concealment, protection, and how to best trade your new found resource.
But these aren’t the focus of this article. 😉
The goal of this article is to bring together all the resources you’ll need to get your system built and running safely.
Materials To Use – What’s Safe?
Many of the materials we use in building our houses leech toxic chemicals into rainwater.
It’s important to know what you’re building your catchment system with, and the potential risks, before you start spending your money and time.
Looking to places where these systems are relied on today will help give us useful tips for building our rainwater catchment system tomorrow.
Did you know that 30,000 to 60,000 people in Hawaii depend on rainwater for survival?
With that many people using rainwater all year round, Hawaii is a great place to start.
From The University of Hawaii’s College of Tropical Agriculture and Human Resources Cooperative Extension Service Hawaii’s Pollution Prevention Information
The condition of your rainwater catchment roof, gutters, pipes, and tank affect the potential for contamination of your water supply. This is especially important to consider if you use your catchment water for drinking.
You should be concerned about the system’s surroundings, condition, and maintenance. Some contaminants in water may affect only appearance, while others such as bacteria, nitrate, and toxins can be extremely harmful and even fatal.
Are the roof, pipes, or faucets made or coated with toxic materials?
Many roof coatings, paints, and collection materials contain toxic substances that can contaminate your tank water. For example, galvanized roofing is a source of zinc, roofs with copper flashing can have high copper and lead concentrations, and some roof coatings and roofing nails contain lead.
Old copper pipes may contain lead solder, and brass faucets may also be a source of lead. You should consider replacing these materials and components or treating them with coatings that are made of nontoxic materials.
Texas A&M Rain Harvesting Center offers a collection of articles covering safe materials, safety guidelines, and a whole slew of other useful resources, including:
NSF International has developed a test protocol that provides independent verification of the safety of the materials used in the production of rainwater harvesting systems. This protocol evaluates materials used in rainwater catchment systems, such as roofing materials, coatings, paints, liners and gutters.
Testing involves exposing catchment system product samples to extensive accelerated outdoor weathering. The systems and system materials that have successfully been tested by NSF under P151 are listed in the NSF Product and Service Listing.
Like what you read? Good! Get email updates (it’s free).
Rainwater Catchment System Tank Size?
Here, bigger isn’t always better. You’ll want to size your tank according to your needs as well as what the environment can provide.
Look at this for a good example of where to start.
This is all about efficiency and cost.
First, check out the National Climatic Data Center and figure out roughly how much rainfall your area will get in the following year.
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You’ll want to know this for month-to-month, preferably going back approximately 10 years, so that you can accurately use the University of Warwick’s Rainwater Tank Performance Calculator. From their site:
As the cost of a domestic rainwater harvesting (DRWH) system depends mainly on the size of the tank, it is important to design the tank to ensure optimum performance at tolerable cost. This programme calculates the approximate system reliability and efficiency for a selection of tank sizes including one that you can define, using your monthly rainfall data and roof area. You can also define how the rainwater will be used by giving a nominal daily demand and choosing between three water management strategies. By looking at the reported performance for all the tank sizes, you can change your chosen size, nominal demand and management strategy until it reaches an acceptable performance level.
The University of Hawaii has a very detailed Rainwater Catchment Systems PDF which includes:
1 Water collection—how to catch the water, how much water you need 2 Water storage—what to keep it in 3 Catchment system maintenance—identifying problems, keeping the tank clean 4 Water treatment—sources of water contamination, principles of water treatment 5 Water testing—keeping tabs on water quality 6 Firefighting concerns
Remember, 60,000 Americans living in Hawaii can’t be all wrong. 😉
This PDF is in-depth, and there are links to additional resources at the bottom of this post.
Here are several videos from Texas A & M showing basic construction, as well as different applications of a rainwater catchment system.
This first video is an introduction into the benefits and uses of a rainwater catchment system.
Here’s an example of using this system at a hunting cabin.
They call this a “rain barn” and you’ll see why
This video shows how they use rainwater capture systems on the Freeman Ranch. Pretty neat!
These next two videos are particularly cool. They’re rainfall simulators.
And if you want some hard-core manuals used by relief workers in the field, please check out the WELL Intranet.
From their site:
Originally published individually in Waterlines, the world’s only magazine devoted entirely to low-cost water and sanitation, these highly illustrated technical briefs bring together a body of information and guidance which has already proved of great practical help to agencies and fieldworkers.
Hope you’ve found this resource useful. What’s your biggest challenge with making your own rainwater catchment system? Tell me in the comments below, and I’ll do my best to find a solution! 🙂
The Prepared Bloggers Network is at it again! We’re glad you’ve found us, because the month of April is all about homesteading.
Homesteading is a lifestyle of self-sufficiency. It is characterized by growing your own food, home preservation of foodstuffs, and it may even involve the small scale production of textiles, clothing, and craftwork for household use or sale. Most importantly homesteading is not defined by where someone lives, such as the city or the country, but by the lifestyle choices they make.
The Prepared Bloggers are passionate about what they do and they each have their own way of achieving self-sufficiency. Grab your favorite drink and enjoy reading about the 30 Ways of Homesteading!
Crops on the Homestead
Straw Bale Gardening from PreparednessMama
Crop Rotation for the Backyard Homesteader from Imperfectly Happy
Benefits of Growing Fruit from SchneiderPeeps
Succession Planting: More Food in the Same Space from 104 Homestead
Crops to Grow for Food Storage from Grow A Good Life
Winter Gardening Series from Our Stoney Acres
How To Build a Raised Garden Bed For Under $12 from Frugal Mama and The Sprout
How to Save Carrot Seeds from Food Storage and Survival
Animals on the Homestead
Getting Your Bees Started from Game and Garden
Homesteading How-To: Bees from Tennessee Homestead
How to Get Ready for Chicks from The Homesteading Hippy
Selecting a Goat Breed for Your Homestead from Chickens Are a Gateway Animal
Adding New Poultry and Livestock from Timber Creek Farm
Beekeeping 101: 5 Things To Do Before Your Bees Arrive from Home Ready Home
How to Prepare for Baby Goats from Homestead Lady
How to Prevent and Naturally Treat Mastitis in the Family Milk Cow from North Country Farmer
Tips to Raising Livestock from Melissa K. Norris
Raising Baby Chicks – Top 5 Chicken Supplies from Easy Homestead
Making the Homestead Work for You – Infrastructure
Ways to Homestead in a Deed Restricted Community from Blue Jean Mama
Building a Homestead from the Ground Up from Beyond Off Grid
DIY Rainwater Catchment System from Survival Prepper Joe
Finding Our Homestead Land from Simply Living Simply
I Wish I Was A Real Homesteader by Little Blog on the Homestead
Endless Fencing Projects from Pasture Deficit Disorder
Essential Homesteading Tools: From Kitchen To Field from Trayer Wilderness
Homesteading Legal Issues from The 7 P’s Blog
Why We Love Small Space Homesteading In Suburbia from Lil’ Suburban Homestead
Preserving and Using the Bounty from the Homestead
How to Dehydrate Corn & Frozen Vegetables from Mom With a Prep
How to Make Soap from Blue Yonder Urban Farms
How to Render Pig Fat from Mama Kautz
How to Make Your Own Stew Starter from Homestead Dreamer
Why You Should Grow and Preserve Rhubarb! from Living Life in Rural Iowa
It’s a Matter of Having A Root Cellar…When You Don’t Have One from A Matter of Preparedness
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About Joe TouchstoneJoe "Slightly Irregular" Touchstone was holding his two baby daughters when he saw a panicked mob strip the shelves of his local grocery mart bare two days before a big storm. Everything changed. Now Joe's intense passion for learning drives him to find only the best survival and prep ideas and info to share.
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