1. 
   tap water
   [n] - water directly from the spigot
   Found op http://www.webdictionary.co.uk/definition.php?query=tap%20water
   
   
2. 
   tap water
   noun water directly from the spigot
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=tap%20water
   
   
3. 
   Tap water
   Tap water (running water, city water, municipal water, etc.) is potable water supplied to a tap (valve) inside the household or workplace. It is a principal component of "indoor plumbing", which became available in urban areas of the developed world during the last quarter of the 19th century, and ...
   Found op http://en.wikipedia.org/wiki/Tap_water
   
   
4. 
   tapwater
   1) It may be filtered
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/tapwater/1
   
   

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