Anti-backflow silicone drain trap, odor-resistant drain siphon, sewer pipe seal for washing machine and home.

Variable diameter design, can be connected to a 20-33 mm drain pipe.

Improved dual odor-control function; the drain pipe and sealing ring fit tightly without leaving any gaps.

Plug and play, adapts to most pipeline installations.

Opens automatically when draining and closes automatically when not draining.

Environmentally friendly silicone, soft, elastic, durable, and resistant to aging.