Water pipes are usually sealed to prevent leaks, so ants cannot enter the house inside the pipes. However, during times of drought you may see fire ants near water faucets in houses, where they are trying to obtain water. You may see ants entering the house through the gap around pipes where they penetrate the slab or through cracks around fixtures in the foundation of the house. Ants can chew through caulk, so caulking these cracks will not prevent entry. The best approach is to treat fire ant mounds located close to buildings before ants can find ways to enter the building.

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