Complete kit!

DIY Rain Barrel Construction and Installation Kit (w/ Downspout Diverter)

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$27.95 (You save $5.00)
$3.50 (Fixed shipping cost)
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  • Product Description




     Note: If ordering bulk quantites of this kit (20+) please contact us for the best price on shipment to your location!

    Note: The flexible fill hose included with the DIY Rain Barrel Construction and Installation Kit is no longer 3 feet long. It has been replaced with a 31-inch accordion-style hose which cannot be cut to length, but can be extended to the desired length for installation.

    We at Rain Brothers, LLC have been designing, constructing, and installing rainwater harvesting systems -- both residential- and commercial-scale -- in the Ohio Region for nearly a decade, and we have used virtually every rainwater downspout diverter on the market. With the diverters on the market, there are recurring problems, including:
    1) Difficult installation
    2) Insufficient inlet size into the barrel/tank
    3) Insufficient overflow, causing diverter to back up drainage
    4) Working only with the smallest downspouts (i.e., 2"x3")

    Our new DIY Rain Barrel Construction and Installation Kit addresses these issues and offers a thoughtful, high-quality, affordable solution.
    For under $30, you get:
    *Three hole saws for drilling/installing valves and downspout diverter (2-1/8", 1-1/2", 1-1/4)
    *3/4" gate valve/garden hose spigot for connection to irrigation hose
    *3/4" drain nipple with cap for quick draining of barrel, linking barrels, or adding a second valve
    *Two threaded rubber grommets for water-tight and easy installation of valve and drain plug
    *1-1/2" rubber grommet for water-tight inlet into tank/barrel
    *31" of flexible hose to link barrel/tank to downspout diverter
    *Rubber "Flexi-Fit" downspout diverter choose either Rectangular (2"x3", 3"x4"downspouts) and Round (3" or 4" round downspouts). Click here for more information on the Round Downspout Diverter.
    *One "do not drink water" label for your new rainwater harvesting system
    *A winterizing cap for quick and easy winterization of your downspout.

    Flexi-Fit Downspout Diverter installs in three easy steps:

    1) Drill hole in downspout (hole saw included in kit).  For 2"x3" downspouts, drill hole in front of downspout.  For 3"x4" downspouts, drill hole in the side of the downspout (3" side).  Ensure hole is level with inlet on barrel.  Click here for more information on the Round Downspout Diverter.
    2) Insert diverter and fasten diverter to downspout with included self-tap screws
    3) Attach fill hose to diverter and into barrel, and start collecting rain!

    Installation Guide




    Shipping is only $3.50 per kit for U.S. orders!  International orders will be charged an additional shipping charge of $10-$20, depending on the order size and address, after an order is placed.


  • Product Reviews


    Write A Review

    1. Everything you need

      This kit is such a good investment and helped me setup my rain barrels with ease. I loved having the drill bit, instructions, and parts to complete the drainage into the rain barrel.

      If you would like to improve things at all, I only have two suggestions:
      1) Drill bit doesn't cut a smooth hole, but was still functional.
      2) Would be nice to have a "patch-like" piece/kit in case you drilled the hole in the wrong place, or in my case: need to move from the rental and can do a quick repair on the downspout.
      on 19th Sep 2016


      Had an empty barrel I saved from a home being sold by a fellow neighbor. He gave me the barrel, so I decided to use it to create our 3rd rain barrel. First barrel I bought was "pre-fab" ($160 total). The second barrel I built through our local Master Gardners extension ($60). This free barrel, along with the Rain Brothers complete kit cost me the total price of the kit ($27.95). Without question, hands down, the Rain Brothers complete kit made creating a working rain barrel the easiest build and installation of any barrel I've done. Immediately after installing, we encountered a tropical storm, with torrential rains. Barrel filled quickly, with the remaining precipitation heading down the spout. No leaks. No issues. It just works! on 9th Sep 2016

    3. Much better design than the diverters sold at big box stores.

      Quick and straightforward installation. Reasonably priced. Works perfectly. on 30th Aug 2016

    4. Easy

      I found the installation to be as easy as shown in the tutorial. I would recommend off setting the drain plug away from the valve, for more clearance. Setting your barrel up 2 concrete blocks high should give you enough clearance to place a 5 gallon bucket under the spout. Great product! on 30th Aug 2016

    5. i dont really need to comment, because the utube demo was so simple and true.

      This was the easiest and most affordable kit i've bought in some time and will do so again in the future, given the need.....i do wish the spigot was metal. on 6th Aug 2016

    6. Easy Set-up

      I just purchased this product and set up the system upon receipt. This is my first time using and it appears that the system will be quite effective. I was concerned about weathering the system over the winter. I was going to take the diverter out of the downspout anyway, but to my surprise, the company already thought about that and advise to remove the diverter and provided a cap to place over the opening. So far, I love the product. on 27th Jul 2016

    7. Easy install

      As i get older the instructions seem to get smaller.This products instruction are BIG and easy to follow. I haven't had much rail but my 80 gal tank is 1/2 full. I like the fact that ther's a winter plug for the downspout on 20th Jul 2016

    8. It doesn't get any better than this!

      I discovered Rain Brothers on YouTube when searching for information on rain barrels. I watched several videos, and determined that their product was best suited for my needs. The ease of installation and instructional videos were great. I'm thinking of getting another rain barrel now! on 19th Jul 2016

    9. Great, Great, and Great...!

      I was looking for a rain collection system for my garden and stumbled upon a Youtube video promoting this product. I placed my order and it arrived three days later. The installation was VERY easy, and quick. After two good rain showers we had collected 110gal. of rainwater, and are waiting to use it when it gets dry here in the south. The cost was very low including the shipping. I suggest to anyone that they at least install this kit using two 55gal. barrels, due to them filling up very fast. Once filled the rain diverts itself into the downspout and does not over flow the barrels. Great product, fast shipping, easy installation, and low maintenance. on 7th Jul 2016

    10. Perfect!!

      Watched the video on YouTube and ordered right away. The shipping was good and on time. I really liked the idea of the internal diverter. It worked great. You don't have to put overflow piping with this system. I have the large downspouts and it worked fine my barrels are full and work great. The rubber sleeve that is used to insert your hose bib is the trick. This is by far the best set up I have ran across. The installation instructions are very good and were easy to use. If you are in the market for catching and using rainwater from your buildings I highly recommend this set up. on 24th Jun 2016

  • Product Videos

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      In this video, we explain how to build your own rain barrel us...

    How to Build and Install a Rain Barrel in 5 Minutes for Less Than $30

    In this video, we explain how to build your own rain barrel using our Rain Barrel DIY Construction and Installation Kit. This product is available here: . For more information, please visit our website at or Thanks for watching!
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