Redigerer Endeløst basseng

[[Fil:Infinity pool.JPG|Et endeløst basseng på et hotell i [[Gran Canaria]], Spaina.|thumb|320px]]

Et '''endeløst basseng''' ([[engelsk]]: '''infinity pool''', '''infinity edge pool,''' '''negative edge,''' '''zero edge,''' «disappearing edge» eller '''vanishing edge pool''') er et [[svømmebasseng]] som skaper en [[optisk illusjon|visuell effekt]] ved at vannet fortsetter til [[horisont]]en, forsvinner eller går mot «[[uendelig]]». 

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Since these pools are almost always built in precarious locations (cliffs, mountain tops, beach front, etc.), sound structural engineering is paramount.  The structural engineering MUST be based upon the geological conditions found on the site.  A geotechnical report should always be comissioned, prior to the commencement of the structural engineering.  The exhorbanent costs of these pools is oftentimes found in the foundation sytems that anchor them to the hillsides.

In reality the edge of the pool terminates in a [[weir]] that is one-half to one inch (12 mm to 25 mm) lower than the required median pool water level. A [[trough]] or [[catch basin]] is constructed below the weir.  The water spills into the catch basin, from where it is then pumped back into the pool.  The effect is particularly impressive where the infinity edge appears to merge with a larger body of water such as the ocean, with the sky (if the pool is located on the side of a hill or mountain), or with foilage.  

Properly built, these pools have two circulation systems.  The first functions just like a regular pool, filtering and heating the water in the main pool.  The second circulation system (known as the "edge system" or "effects system"), filters the water in the catch basin and returns it to the upper pool.  When the edge-system stops, the water level in the upper pool continues to spill into the basin – stopping at the level of the weir wall.  The water necessary to raise the upper pool and fill the edge-system plumbing is called the "water in transit."  Considerable skill is required on the part of the designer to incorporate a catch basin of an appropriate size.  

If it is too small, swimmers will force out ("bather displacement") more water than the catch basin can hold.  This can lead to catostrophic landslides or hillside erosion.  Additionally, if the basin is too small, the edge-system pump may also draw down the catch basins' level, before the water has returned in sufficient quatity for the edge pump to retain its prime.  The catch basin also needs to have additional holding capacity (above its static level – known as "freeboard").  The freeboard is the available extra capicity to hold the bather displacement and rain water, before it reaches the level of the overflow line.

Dedicated filtration systems are required on both systems.  The edge pump is usually a much larger pump, required to overcome bather displacement, water in transit, and to raise the upper pool's level.  It would be a waste of energy to run such a large pump as a primary filtration system.  Adequate filtration is required on the edge-system (based upon the edge-system flow rate), as most of the debris flows over the weir and into the catch basin.  A smaller circulation pump can be used for daily filtration on the main pool.

Failure to install filtration on the edge-sytem will result in the debris in the basin being blown back into the upper pool.  

An automatic fill device should be incorporated into the catch basin.  Electronic autofill sensors are preferred by the leading designers, as they have a built-in delay to compensate for wave action from bather surges.  Common toilet [[cistern]] refill device should not be utilized, as they constantly bob up & down, causing annoying hissing sounds & water hammering in the nearby residence.  

Infinity edge pools were the begining of the trend to create architectural swimming pools, elevating swimming pools to an art form.  From this trend, a new breed of designer was born, the aquatic designer, aquatic architect, watershape designer, or watershaper.

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[[Fil:infinitypool.jpg|Et ''endeløst basseng'' på et feriested i [[Kovalam]]<!-- Taj Green Cove hotel-->, [[India]].|left|thumb|200px]]

== Eksterne lenker ==
* {{Språkikon|en}} [http://www.flickr.com/photos/maapu/2092436409/ The infinity pool @the oneandonly reethirah, maldives] fra [[Flickr]]
<!-- * {{Språkikon|en}} [http://travel.webshots.com/photo/2367562060011937263PNIMGT Infinity pool with sand beach and bottom] &ndash; Bilde av et endeløst basseng med sandstrand og -bunn. Denne lenken kan fjernes, da bildet ikke lenger er tilhjengelig -->
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