My wife and I purchased an esthetically pleasing rain barrel for the front yard. After experiencing the benefits there I began looking to build my own system for the backyard for the garden, the landscape, and for play. As I reviewed many online plans and products, I found a number of good ideas. This design I developed differs in that it does not require any drilling/cutting of holes in the barrel for the water flow and the volume of water passed through the system, especially the output, is as high as possible, limited only by the attachment at the end of the hose.
In my case, I knew we wanted a 2 barrel design, the same plan can be followed for a single barrel design. Modifications will be noted throughout the instructable.
Step 1: Out Flow Parts List
Here are the parts that I used and the price. This is for building the piping and valve assemblies to draw water out of the barrel. The parts needed for bringing the water into the barrel are handled separately in step 4. All of the following parts can be purchased at Home Depot.
2 2" DWV MIP Adapter - $0.90 each
2 2" DWV Street Elbow 90 degree Spigot x Hub - $2.01 each
1 2" PVC Pipe (2' section pre-cut) - $2.21
2 2" PVC Tee - $2.49 each
2 2" x 1-1/2" PVC Drain Waste Vent Flush Bushing - $0.86 each
2 1-1/2" x 3/4" PVC Schedule 40 Bushing Spigot x FIPT - $1.27 each
2 3/4" Short Galvanized Nipple - $0.98 each
** I chose not to use this but instead got the PVC schedule 80 (gray) equivalent from my local Ace Hardware for $0.79 to prevent as much metal in the design as possible.
2 3/4" PVC Ball Valve - $2.94 each
2 3/4" MPT x 3/4" MHT adapter - $3.53 each
** While my local Ace Hardware did have this piece in plastic for less, I chose to go with brass here to better withstand contact with the metal threads on my hoses.
1 can of PVC primer and cement - $6.96
For a single barrel design you do not need the Tees or the PVC pipe. You have the option to change the 90 degree Street Elbow with the 45 degree Street Elbow to reduce the bend of an attached hose.