Drain plug With a Toiee Drain Plug, you can simply close the drain pipe of the apartment with a balloon and thus prevent waste water from flowing back. The Toiee Drain Plug is a complete product with pump, hose and balloon. Available in 4 sizes for drain pipes: 32mm, 40/50mm, 75mm and 110mm. With 125 mm, the siphon of the toilet can also be closed. With a Toiee Drain Plug, you can protect your home from the backflow of waste water in a simple and cost-effective way. A Toiee Drain Plug has been tested by the Danish Technological Institute for a water pressure of 3 mWs (3 m hydrostatic head). The Toiee Drain Plug is installed in the drain pipe/siphon of the toilet before the cloud break and removed again when the cloud break is overcome. The Toiee Drain Plug has a hose with a pilot balloon. The pilot balloon is a mirror of the large balloon, and the logic behind it is that when there is air in the pilot balloon, there is also air in the balloon, which is in the drain pipe and cannot be seen. In this way, you can make sure that the air has not escaped from the balloon during a cloud break.