Occasionally, the piping may leak and need to be replaced. A caretaker or tap committee may be appointed to keep the tap functioning and the surroundings clean, and to regulate the amount of water used. Committee members may also collect the fees for water use. Sometimes, water vendors are allowed to fill their tanks at public standposts at special rates, for resale to people living farther away.
====Potential problems====
— if social problems remain unsolved, or if the standpost is not conveniently located, this can lead to the tapstand not being maintained properly, or even vandalised;
— often, the taps are not closed after use, or even left open on purpose to irrigate a nearby plot, which can lead to water accumulation at the tapstand site;
— standposts at the end of a piped system often have insufficient water pressure;
— special attention should be given to how water is handled after collection at the standpost, to prevent the water from subsequently becoming contaminated.
==Acknowledgements==
* Brikke, François, and Bredero, Maarten. ''[http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0CC0QFjAB&url=http%3A%2F%2Fwww.who.int%2Fwater_sanitation_health%2Fhygiene%2Fom%2Flinkingintro.pdf&ei=cwJpT-zaO-OiiQKCst2rBw&usg=AFQjCNEWOQhTgF3a7lzhuw5OA2KmbVGxcA&sig2=Rt2EURUyGVqDcwFg6p0xAw Linking technology choice with operation and maintenance in the context of community water supply and sanitation: A reference document for planners and project staff]''. World Health Organization and IRC Water and Sanitation Centre. Geneva, Switzerland 2003.