Here is the one located in North side of the house. It were two rain barrels. I added one more. I use T sharp pipe to connect two three barrels. 

Config 1

Config 2 and overflow setup. 

Each barrel has Green Splash Block to draw away the water from the house. 

Here is the one located in west side of the house. It is on the side of garage. It was one rain barrel. I added one more. I use T sharp pipe to connect two rain barrels. 

After one of bin full, it will re-direct rain water to other barrel away from garage and over full away from the house.

Detail2

Here is the website for reimburse the cost.

https://www.montgomerycountymd.gov/water/rainscapes/rebates.html