Floor Drain

A floor drain is a plumbing fixture recessed into the floor that collects water and directs it into the building's sewer system. Floor drains are essential in wet rooms such as bathrooms, showers, laundry rooms, and utility areas where water is regularly present on the floor surface. Each floor drain includes a water trap (P-trap) that maintains a water seal to block sewer gases.

The floor drain is a critical component of the waterproofing system in wet rooms. The drain body must form a watertight connection with the waterproofing membrane applied to the floor and walls. A failed seal at the floor drain is one of the most common causes of moisture damage in bathrooms — water seeps beneath the surface, saturating the subfloor and potentially causing structural rot.

Regular cleaning is essential for proper floor drain function. Hair, soap residue, and debris accumulate in the drain grate and trap, slowing drainage and creating odor problems. The grate should be removed and cleaned at least monthly, and the water trap thoroughly cleaned several times a year. Slow-draining floor drains should be addressed promptly, as standing water increases the risk of leaks.

If your floor drain emits persistent sewer odors despite cleaning, the water trap may be cracked or the seal between the drain and the waterproofing membrane may have failed. Both issues require professional assessment, as they can lead to hidden moisture damage within the floor structure.