Step-by-Step Instructions: In-ground sleeve mount: 1. Select a clear flag and flagpole location (above and below ground). Check for underground sprinkler, water lines, electrical lines (call utilities if needed). 2. Dig a 25" hole with a tapered diameter, see diagram below. 3. Put a 3" of gravel under base of aluminum sleeve (allows for drainage). 4. Place the plastic cap in the top of the aluminum sleeve (keeps the cement out). 5.
