Which of the following is NOT a problem associated with drains for basement walkouts?

The issue of the drain being connected to a house floor drain system does not typically fall under the category of problems associated with drains for basement walkouts. Having a floor drain system can be beneficial as it may help manage water that enters from various sources, including basement walkouts. This connection can facilitate proper drainage and prevent water accumulation around the foundation or in the basement area.

In contrast, the other options represent common problems that can hinder the effectiveness of basement walkout drains. Missing drains can lead to severe water damage as there is no system in place to redirect rainwater or groundwater away from the structure. Undersized drains may not handle the volume of water, leading to overflow and potential flooding. An outdoor trap in cold climates can cause freezing issues, which would impair proper drainage during winter months, leading to a variety of wetness-related problems in the basement area.