building a rainwater filter system using gravity. - Rainwater filter system

Rainwater filter system

Building a rainwater filter system using gravity.


Hi, I am building a rainwater filter system using gravity. Basically a barrel (55gal.) with layers of gravel, sand and charcoal to filter the rain water before it goes into storage tank (2500gal.). I am not sure which type or size needed. Could you please give me some options on what you have. I would like to buy 15# plus or whatever makes sense for saving money. I have three systems ranging from 2500 to 25000 gal. tanks. The large tank 25000 gal. has had some tannin’s from oaks trees covering the roof of the house that collects the water! One real big glass of oak water, not real good!!
Thank You , Allanrainwater filtration - Rainwater filter system


Hello Allan
If you plan to put all the layers in one barrel then the water needs to enter from the bottom through the gravel first, then the sand and last through the charcoal. I would recommend a layer of a fine nylon mesh fabric that will not decompose, between the layers.

The granular charcoal you will want to use for rainwater would be the GAC coconut 8×16 mesh

For the tannins you can also add the GAC wood based 8×16 mesh.

One consideration is how fast the rainwater is flowing through the tank. In a downpour, the flow may be too fast for the 8×16 and you may need to go with the finer GAC 12×30 mesh.

I hope that is helpful.
Please let me know how it works for you.
John Dinsley

Follow us on Social Media:

Facebook - Rainwater filter system

Instagram - Rainwater filter system

twitter - Rainwater filter system

Pintetest - Rainwater filter system

amazon shop button - Rainwater filter system

ebay store - Rainwater filter system

Learn how to use activated charcoal by searching the blog Charcoal Times - Rainwater filter system

 Customer Support
308-665-1566 button 300x49 - Rainwater filter button - Rainwater filter system button - Rainwater filter system button - Rainwater filter system

Check out what’s new in the world of activated charcoal.  Below you will find great resources to stay on top of the latest benefits of nature’s amazing remedy.
5d34d6c4 01e6 4cfe b361 b177222c83ad.png?zoom=1 - Rainwater filter system
Read stories of how activated charcoal is working for others.
5641c487 a688 4f03 95b2 b9a2605f7905.png?zoom=1 - Rainwater filter system
Find all the latest research about activated charcoal here.
1d7655fb 626d 447e a31e 288d616df7e8.png?zoom=1 - Rainwater filter system
If activated charcoal is in the news you can bet you can find it here.
7eb00ef1 d288 42b9 90bb 126decc35501.png?zoom=1 - Rainwater filter system
Follow our blog for all the latest information about activated charcoal.
cleardot - Rainwater filter system

Follow us on Social Media

Also Available On

Visit Our Sister Sites - The largest collection of activated charcoal products on the internet. Charcoal House - The Largest Collection of Charcoal Products on the Internet


Spread the love