How to build a rain water collector

Step 23 Installing the plumbing

This is the completed connection.

With both hose bibs in the fully open position, water will be able to drain from the top barrel into the bottom.

Comments

[chrisplyon]

You could have added this link in the back because your bottom barrel now will never be completely full. The water will stop transferring when it hits the spigot on the bottom barrel leaving the top and back part of your bottom barrel empty. If you moved them to the back, you could fill up that extra 3-4 gallons of what would be air space.

[iPodGuy]

You are correct, but I usually don't run out of water in between rains so the wasted area is not a concern of mine.  To utilize every single cubic inch of storage space possible, I would suggest a side-by-side barrel system.