A floor drain is a plumbing fixture installed in the floor of a structure, specifically designed to remove any standing water nearby. Typically round in shape, they can also be square or rectangular, with sizes ranging from 2 inches to 12 inches, most commonly 4 inches in diameter. The gratings, made of either metal or plastic, help filter debris. The floor around the drain is sloped to promote water flow towards it. Residential floor drains are often found in basements, usually positioned near the water heater or washer/dryer. In commercial settings, commercial floor drains are commonly located in restrooms, kitchens, refrigerator areas, locker/shower rooms, laundry facilities, and near swimming pools, among other places.
To ensure safety and prevent foreign objects or pests from entering the facility, a strainer should always be securely placed over the floor drain. However, if the strainer lacks a smooth surface, hair and other debris can still accumulate, potentially clogging the drain over time.