Rain Water Collection?

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Mar 14, 2012
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I haven't seen anything about this topic yet. I've been thinking of setting something up to collect and store rain water. I've seen some things on instructables where people have made some. I'm wondering if anyone here has ever done this.

One of the more interesting things I saw was someone had a marine battery hooked up to a little pump and solar charger. The first thing I thought of is if you had a decent enough filter/purifier you might be able to drink that water in an emergency.

So the first question would be: Do/Would you use a RWC for an emergency drinking water supply or for other purposes (gardening most likely)?

If you're collecting water with any of the setups I've seen before, the most likely delivery method is going to be gravity. Setting up the solar pump system may be more trouble than it's worth and a lot more expensive. And since the water will most likely be coming off of your roof into your gutters and then down into the barrel(s), how do you filter this?

I figure the first step is some kind of gutter protector (gutter guard, gutter helmet, etc...) to keep large pieces of debris and animals out of the gutter. Would really suck to have this nice RWC set up and then have a squirrel build a nest in your down spout. But even with the gutter covers you'll get bits of shingle in the gutter and then in your RWC. And on top of that, how long can the water sit in the barrels before it stagnates?

But before you even have to worry about that stuff, how do you even get the material needed to build one without spending a ton of money? In one of the instructables, the guy says he got the barrels cheap from a friend. That's great for him but I haven't seen any 50 gallon plastic barrels online for less than $50. His setup used 4 of these. That's over $200 with shipping just for barrels. The plumbing can be had for pretty cheap and you can get lumber relatively inexpensively.

Is there some way to get 50+ gallon water barrels for less than $50? $20 each would be easier to swallow. I know guys with barrels but they've had toxic chemicals in them (chlorine, oil, etc) so I definitely wouldn't be drinking water out of those, or spraying them on my lawn for that matter.

Is there an alternative to the plastic water barrels? Or maybe a better way to store the water than in a barrel?

And another consideration, if you have a basement you likely have a sump pump to keep your basement dry. Think there's a way to recycle that water instead of just pumping it out?

What do you all think? Worth the time, money and effort to make a RWC?
 
First and foremost, you should check your local laws regarding this. In some states it is actually illegal to collect/divert rainwater.

I've done this for a couple of years now in the most no-frills manner possible. I simply placed a few old trashcans directly underneath locations where rainwater tends to run off of the roof. Regarding using your gutter system for collection... just be sure to have a plan for excess collection so as not to defeat the purpose of having gutters in the first place or potentially cause damage to your home in some way.

Personally, I have only ever collected water for use with gardening. And I've never tried pumping it out directly, but rather bucketing it out and into watering cans. Gravity is only going to do so much with so little weight behind it.

As far as cheapness... as I mentioned, I used old trash cans. I guarantee you that the 50gal barrels will be better in the long run, though. Trashcans aren't meant to sit out in the weather and I've already lost one due to cracking from sun exposure.
 
The current issue of Backwoodsman has a couple of articles on collection and filtration.

Jeff
 
I live in a small rural community so I'm pretty sure i'll be okay law wise but I'll definitely double check. Never really thought about that.

One of the things I thought of for the gutter system would be a "collection chamber" that empties at the bottom into the barrel with a gutter run off the top so if the barrel gets full the excess water just goes through the drain at the top into a secondary down spout. Kinda like how a bath tub works.

The exposure thing was something I forgot to mention in my opening post. A lot of systems I see are not enclosed or otherwise protected from the elements. I'd have to cover mine if for no other reason than my wife would flip if there were a bunch of big blue plastic barrels all around the house. lol.

I thought of maybe making a shed like enclosure that could perform double duty as a storage shed for gardening tools and such. There are likely a million different ways to do this for various purposes.

It does seem that the #1 use is for gardening though. Which is probably how I'll have to sell my wife on the idea. lol

Some people say to put bleach in the barrel but I'd rather not do something like that. Does bleach integrate evenly into water or would it separate and give you pockets of bleach? Don't know enough about it to really consider it a viable option at this time.
 
Some people say to put bleach in the barrel but I'd rather not do something like that. Does bleach integrate evenly into water or would it separate and give you pockets of bleach? Don't know enough about it to really consider it a viable option at this time.
I've never used bleach (or chlorine) myself, so I can't really speak to if it separates or not. What I can say, though, is that not using something to keep the water clear will result in more effort on your part to occasionally clean up the algae growth if it concerns you. Me, I figure... how bad could it possibly be for a plant? Free nutrients, I say! At most I would scrub the sides down every once in a while.

Also, since my containers are uncovered, I don't really want to overcollect and end up breeding mosquitos. Just something else to consider.
 
if a source of non potable water is your objective... have you considered a shallow well?...if the average water table in your area is around 20', you can use a pitcher pump, or if its deeper, one of the deep piston pumps....a sand point, pump, and 20' of 1 1/4 steel pipe should be in the $200 range...I just reclaimed a well that had not been used in 30+ years... lots of vids on YouTube
 
I have a rain barrel at the corner of the house. We only use it for gardening.

We have a diverter (sheet metal flap) valve installed inline in the downspout, so you can go to the barrel or flow past it. There is mesh on top of the barrel to keep mosquitoes out (or in, I guess), and a little cone of expanded wire mesh shoved into the top of the downspout to keep out big chunks. The barrel is up about 2ft on cmu's with a hose fitting at the top (overflow) and bottom (gravity feed to hose). We get enough pressure to water the plantings on 2 sides... about 30' or so.

We've had friends make them with food grade barrels from local industry (I think they got them used from a soft drink plant) for about $25 a piece. If you can't get the barrels, you could do it with trash cans. I've seen that too. Ours was a gift from our wedding, so it was probably more than that.

I don't see why you couldn't have the sump pump outlet diverted to a reservoir... barrel, trash can, whatever. I imagine you would have to be sure to handle the overflow potential, b/c it will probably fill up fast in a hard rain. Also, I'm not sure if that water is potable... do you have a septic drain field or any chemical storage nearby on your property?
 
Thanks for all of the info, everyone!

There's a guy in the next town over that has a water cube sitting out with his other junk in his back yard, going to see if he will part with it.
 
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