4. Screw the hose bib into the hole you made in the barrel. 
5. Drill a hole in the top of barrel so it doesn't hold water and become a breeding ground for mosquitoes. 
6. Place a piece of screen under the barrel's top to keep mosquitoes out of the  barrel, then cut the excess screen with a knife.
4. Screw the hose bib into the hole you made in the barrel. 5. Drill a hole in the top of barrel so it doesn't hold water and become a breeding ground for mosquitoes. 6. Place a piece of screen under the barrel's top to keep mosquitoes out of the barrel, then cut the excess screen with a knife.
4. Screw the hose bib into the hole you made in the barrel. 5. Drill a hole in the top of barrel so it doesn't hold water and become a breeding ground for mosquitoes. 6. Place a piece of screen under the barrel's top to keep mosquitoes out of the barrel, then cut the excess screen with a knife.