Rain Barrel Project

Step 5 Start the setup

Drill two holes into the side of each barrel. I did mine below the 2 1/4" opening. One 3-6" from the bottom and one about 3/4 of the way up the side of the barrel.
Now the opening may be to small yet to screw the fitting into the side so you may have to slowly make it wider with the drill bit. Don't make it too wide that it doesn't screw in at all.

Before you screw in the adapter wrap it in pipe tape.
Screw it in part way and add some of the marine caulk around the entire way and screw it in the rest of the way.
After it is in put a bead around then entire fitting.

You could get away with one in this setup but you may have uneven filling of both barrels if you only have one from what I've read in other instructions but have not experienced it myself.

After thoughts:
I think i may change this part already. Instead of using the gray fitting below i may change it to a screw in PVC fitting. I will elaborate more on this later.
If you have a barrel you can reach into also put a bead of caulk around the inside.
You could also use nuts and washers if you can reach in and tighten from the inside.