At present, domestic brands are increasingly emphasizing the anti-odor inner core of floor drains, but whether it is the magnetic flap inner core of the submarine or the "magnetic levitation" inner core of another major floor drain manufacturer, it is a mechanical seal in principle. Due to the problem of aging of components, such as spring aging, magnet adsorption of iron filings, etc., the anti-odor stability is not as good as that of the water seal, after all, as long as it is used frequently, the anti-odor performance of the water seal floor drain will hardly change.
 
Liufang is one of the few manufacturers specializing in water-sealed floor drains in China, and has a number of national patents. Among them, the patented water seal inner core is more distinctive. On the basis of the traditional water-sealed floor drain, the six defenses have been slightly improved. Considering the problem of hair entanglement, the six defenses only make an opening on the inner core, so there is no partition between the openings, and the hair has no attachment and winding points, which can slightly reduce the possibility of blockage. In terms of details, the rubber ring of the inner core increases the tightness, and the 304 stainless steel is also very suitable for the water-sealed inner core, which is generally an excellent product on the market.
 
There are two options for the panel material of the six-proof floor drain, copper alloy and stainless steel, the former is priced at about 100 yuan, and the latter is priced at about 80 yuan. In addition, the heat of the round shield floor drain of the annular sewer outlet is also relatively high, and it is favored by some users due to its pleasing appearance. There are also several strip-shaped floor drains in the six defenses, with a length of 300mm and 600mm, and the price of 300 yuan is more realistic. Due to the large space under the strip floor drain grid, water can be stored, which can provide a certain degree of buffering, and slightly improve the drainage capacity of the water-sealed floor drain.
 
There is also a short core for the six proofs, which is suitable for environments with limited installation depth. However, it is necessary to remind users that the depth of the water seal of the inner core of this floor drain is obviously not enough to 50mm, and it is not recommended to use it if the installation space is really limited.