inlet allows alternative suction paths for the inflow. Also, swimming pool safety devices are available to automatically turn off an operating pump if a rapid increase in suction is detected, as could happen during a suction entrapment incident. While fear of the drain may be counterproductive, children should be taught not to intentionally touch or attempt to block components of a swimming pool recirculation system. Since children often play in public fountains, the use of multiple drains is a mandatory safety feature regardless of whether or not the architect or planner intends that the fountain be used as an aquatic play feature. This is to ensure minimal risk of plumbing entrapment, but vandals can sometimes break into drains in the night time and remove the covers (commonly known as "drain mugging"), leaving them in a hazardous condition. Legislation On December 17, 2007 the national Virginia Graeme Baker Pool And Spa Safety Act (P&SS Act) was passed into law in the US. This law seeks to bring an end to suction entrapment related injuries and deaths by incorporating consumer protection regulation of pool and spa drains. Drain covers A drain cover is a cover with holes (e.g. a manhole) or a grating used to cover a drain, to prevent unwanted entry of foreign objects, or injury to people or animals. It allows drainage of liquids but prevents entry from large solid objects, and thus acts as a coarse filter. A sink drain cover is a drain cover used to cover the sink drain. Maintenance Blocked drains are a common problem in bathrooms and kitchens. In some cases, chemical drain cleaner can clear the blockage, or a drain snake or augur can be used to mechanically clear the blockage. Disassembly of drain pipes can be an effective method of clearing severe blockages, especially if caused by presence of a solid object. Sometimes, a licensed plumber is needed to rectify more fundamental issues with the installation. Blocked drains, if left long enough, can develop into a health hazard as the presence of mold and bacteria increases. Standards The American Society of Mechanical Engineers publishes the following standards: A112.6.3 – Floor and Trench Drains A112.6.4 – Roof, Deck, and Balcony Drains See also Domestic water system Drain (HVAC) Drainage system (disambiguation) Piping and plumbing fitting Plumbing Plumbing drainage venting Septic system Sewage collection and disposal Trench drain (Channel drain) References Plumbing Drainage