Shower Floor Drain Backflow Preventer One Way Drain Valve Sewer Core Magnetic Drainage Insert Drain Plug Oversized(2-3.9in hole) (Suitable for Tube Depth 2.56-4.13in) (Caliber 2-3.9in,Depth 4.13in)

【EXCLUSIVE PATENT DESIGN】Different from ordinary floor drains on the market,our floor drain is designed as an egg structure, this is our new original design,after lots of trials and tests, it can fully optimize large fluid cross sections,leave enough space for drainage. 【360 DEGREE DRAINAGE DESIGN】Rotating fan blades convert gravity from drainage to centrifugal force to accelerate drainage.No matter how large the amount of water can be discharge quickly.Rotating self-cleaning keep it clean at all times 【AUTOMATICLLY OPEN-CLOSE DESIGN】Patented maglev drainage, automatically open when draining,ensuring the smooth draining, automatically close after drain,seal stinky smell and odor from sewage gas.Prevent the drain water from backing up to the room,anti- water leakage and overflow. 【DURABLE AND CONVENIENT】Insert the floor drain core into the sewer,installs in seconds.When the filter element needs to be clean, it can be take it out from sewer by the handle directly.Our floor drain core is made of high quality brass and pps nanometer new material, which is stable and durable 【CLOSE-ISOLATED MAGNETIC TECHNOLOGY】As sewer is connected with the underground septic tank, sewag, or other air may enter room from smelly drain.It's necessary for every family to have a high quality floor drain.