Release Date:

2026-04-17

The material of a stainless-steel floor drain itself does not affect its odor-proof performance; what truly determines how well it prevents odors is the internal structural design. Whether the material is 304 or 201 stainless steel only affects durability. Comparison of common structural designs in terms of odor-proof performance: Deep-water-seal floor drains maintain a water seal height of ≥5 cm, relying on the water column to block odors—this provides the most reliable odor prevention and also offers good insect-repellent performance, making them ideal for long-term use in bathrooms. The downside is that drainage is slightly slower, and the water seal will lose its effectiveness if it dries out; if the drain is left unused for an extended period, you should occasionally pour water into it. Magnetic or gravity-activated self-sealing floor drains automatically close when there is no water and open when water flows through, so you don’t have to worry about the water seal drying out. They drain quickly and are well suited for shower areas. However, if the sealing gasket ages or hair gets stuck, their odor-proof performance will deteriorate. Silicone-core floor drains have a simple structure and low cost; they offer decent short-term odor protection, but silicone tends to age and harden over time, causing the seal to weaken year by year. Non-odor-proof direct-drain floor drains provide no odor protection at all and are only suitable for balconies or dry areas—never use them in bathrooms. Overall: 304 stainless steel combined with a deep-water seal or gravity-activated self-sealing mechanism delivers reliable and durable odor prevention; by contrast, low-quality stainless steel paired with a simple sealing core results in rapid loss of odor-proof performance. With regular removal of hair and other debris and proper maintenance of the sealing core, odor-proof performance can remain stable over the long term.