fig1 is a schematic illustration of a separation system 100 according to an exemplary embodiment of the invention . in an exemplary embodiment of the invention , separation system 100 comprises a main chamber 10 and a secondary chamber 20 . main chamber 10 and secondary chamber 20 are connected together at the bottom with a fluid connection path 50 . in some embodiments of the invention , chamber 10 , chamber 20 and connection path 50 are comprised from a single chamber , in which left and right sides 10 and 20 are separated , for example , by a baffle . in such a case connection path 50 is almost virtual since it is reduced to the width of the separation between the chambers . in an exemplary embodiment of the invention , a mixture of fluids 45 with different specific gravities , for example water and oil , are directed to a container 70 . optionally , the mixture is physically , positioned higher than chamber 10 in order for it to be able to flow to separation system 100 by the force of gravity . optionally , container 70 is connected by a conduit 60 to an inlet 95 on the lower part of chamber 10 above connection path 50 . alternatively conduit 60 is connected to an inlet 95 on the upper part of chamber 10 as described below regarding fig2 . however , as indicated in the figure , the level of the input mixture will be between the heights of outlets 30 and 40 , based on the amount of each fluid in the mixture . optionally a large tray such as container 70 is used to receive the mixture , as for example , when the source of the mixture is a condenser . alternatively , the mixture can be piped directly into 10 . in an exemplary embodiment of the invention , on the upper part of chamber 10 there is an outlet 30 for the lighter fluid and on the upper part of chamber 20 there is an outlet 40 for the heavier fluid . in some embodiments of the invention , a continuous flow of mixture 45 is supplied to separation system 100 . the continuous flow enters chamber 10 and separates itself under the influence of the gravitational force . the heavier fluid 15 ( e . g . water ) sinks to the bottom of chamber 10 and the lighter fluid 25 ( e . g . oil ), rises to the top of chamber 10 . the heavier fluid 15 flows from chamber 10 through connection 50 to chamber 20 and flows out of outlet 40 . lighter fluid 25 is blocked by the separation between chamber 10 and chamber 20 from spreading through the rest of separation system 100 , lighter fluid 25 rises to the top of chamber 10 and flows out through outlet 30 . in some embodiments of the invention , separation system 100 is initialized by filling it with the heavy fluid 15 in order to prevent mixture 45 from reaching chamber 20 , which would cause an initial output of some of lighter fluid 25 from outlet 40 . alternatively , the initial flow from outlet 40 is optionally discarded until separation system 100 stabilizes , wherein chamber 20 comprises only heavy fluid 15 . to empty the system , a valve ( not shown ) is conveniently provided at the bottom of passage 50 or at the bottom of chamber 10 or chamber 20 . opening this valve will empty the system . in an exemplary embodiment of the invention , the top of chamber 10 and / or chamber 20 and / or container 70 , are optionally vented to the atmosphere in order to prevent a build up of pressure on the fluids in the chambers . if not so vented , it may be desirable to connect the tops of chambers 10 and 20 to avoid air pressure differentials between the chambers . in an exemplary embodiment of the invention , at the interface between lighter fluid 25 and heavier fluid 15 , a layer 35 comprised of a fungus and / or an amalgam of the fluids or other undesired waste is formed due to a small amount of interaction between the two fluids although they are essentially immiscible . additionally contaminants which are lighter than the heavier fluid but heavier than the lighter fluid will remain trapped between the two fluids . layer 30 may comprise a gel . in some embodiments of the invention , a waste outlet 55 is positioned directly below the position of layer 35 , which is defined by the specific gravity of the two fluids . optionally , waste outlet 55 is closed with a valve 65 , which is periodically opened for a short time , in order to dispose of contaminants that are trapped between the fluids . in an exemplary embodiment of the invention , outlet 30 , is positioned at a height p above the top of fluid connection path 50 . optionally , p is selected tall enough to accommodate inlet 95 , outlet 55 and outlet 30 with spacing between them to accommodate a buildup of the various fluids between the ports ( 95 , 55 , 30 ). optionally , a larger value of p will contribute to a finer separation of the fluids , since it allows for a longer flow path before exiting the system outlets . p can be increased if higher flow is desired . in addition , since separation of the fluids takes place in chamber 10 , this chamber should be made wide enough ( or of a large enough diameter if round ) to allow enough time for separation to take place , considering the flow rate . it should be noted that the system does not have any intrinsic limitation on flow rate . however , as the flow rate is increased , the amount of time the mixture remains in chamber 10 is decreased , so that separation may be incomplete . the dimensions should be adapted to take into consideration the purity desired , the flow rate expected and the speed with which the materials separate . the position j of the interface between the two fluids in chamber 10 below outlet 30 is determined by the height difference k of outlet 30 and outlet 40 and the value of the specific gravity of the fluids . the following equation shows the resulting relationship : in an exemplary embodiment of the invention , with water as the heavy fluid ( sg ( h )= 1 ) and with an oil as the light fluid ( e . g ., sg ( l )= 0 . 75 ) the vertical distance of the position of the interface between the two fluids from the oil outlet 30 is 4 times the vertical distance of the water outlet from the oil outlet . optionally , based on such a calculation waste outlet 55 is positioned below the interface position . the height outlet 55 above the top of conduit 50 is chosen to leave a quantity of heavier liquid in chamber 10 . when outlet 55 is open , the level of liquid in chamber 20 will fall as will the level of light liquid in chamber 10 . if the height of outlet 55 is too low , the lighter liquid will pass into chamber 20 , from which it can only be removed by draining the whole system . fig2 is a schematic illustration of a separation system 200 with a high inlet according to an exemplary embodiment of the invention . in some embodiments of the invention , inlet 95 is positioned on the upper portion of chamber 10 , wherein mixture 45 enters separation system 200 into the volume containing lighter fluid 25 , as shown in fig2 . in a system with a high inlet 95 , heavy fluid 15 sinks to the bottom of chamber 10 and light fluid 25 remains in the upper volume . in a separation system 200 with a high inlet 95 , the position of the interface 35 between the fluids and correspondingly waste outlet 55 are positioned below inlet 95 , in contrast to being above inlet 95 in a separation system 100 with a low inlet 95 . in some embodiments of the invention , purification of one of the fluids is of more important and the other is less important . for example , one of the fluids may be expensive and / or it may be costly or hazardous to discard so it is salvaged for reuse ( e . g . an expensive oil ). alternatively or additionally , one of the fluids may be a by - product , which needs to be cleaned to a reasonable level in order to be discarded ( e . g . contaminated water ). in some embodiments of the invention , separation system 200 is used to salvage lighter fluid 25 and optionally discard heavy fluid 15 . in such a case a high inlet is optionally used as shown in fig2 , to prevent lighter fluid 25 from collecting additional contaminants by passing through layer 35 . in such a case heavier fluid 15 , which is to be discarded will sink down through layer 35 . in contrast separation system 100 is optionally used to salvage heavy fluid 15 and optionally discard lighter fluid 25 . in separation system 100 a low inlet is used so lighter fluid 25 passes through layer 35 and heavier fluid 15 will optionally , be less contaminated . fig3 is a schematic illustration of a separation system 300 with secondary outlets according to an exemplary embodiment of the invention . in some embodiments of the invention , an additional outlet 80 is provided as an auxiliary for outlet 30 and an additional outlet 90 is provided as an auxiliary for outlet 40 . the additional outlets 80 , 90 serve as safeguard outlets for the respective primary outlets to prevent fluid mixing due to backflow from a disturbance in a primary outlet channel . alternatively or additionally , the additional outlets serve to overcome clogging in the primary outlet . in some embodiments of the invention , additional outlets 80 , 90 are positioned directly above their respective primary outlets , wherein optionally outlets 40 and 80 are positioned lower than outlets 30 and 90 , in order to prevent a backup of the denser fluid into the less dense outlet channels . alternatively or additionally , additional outlets 80 , 90 are positioned adjacent to the primary outlet or opposite the primary outlet in the same chamber . optionally , additional outlets 80 , 90 , serve in parallel with the primary outlet to provide backup to the fluid flow . fig4 is a schematic illustration of a separation system 400 with a secondary purifying level according to an exemplary embodiment of the invention . in some embodiments of the invention , separation system 400 comprises a secondary purifying level to enhance the purity of the separated fluids . fig4 shows a secondary purifying level 85 for the heavier fluid . optionally , secondary purifying level 85 comprises a “ u ” shaped system of the same size or different size such as provided by the first purifying level . in some embodiments of the invention , a secondary purifying level can be for the heavier fluid , the lighter fluid or both . in some embodiments of the invention , secondary purifying level 85 blocks any residue of lighter fluid 25 that managed to pass through with fluid 15 to chamber 20 or other contaminants . optionally , the residue of lighter fluid 25 will be trapped at outlet 40 in chamber 20 as a result of its lighter specific gravity . in some embodiments of the invention , an escape outlet 105 with a valve 115 is added at the bottom of purifying level 85 , in order to allow periodic drainage of the trapped residue of lighter fluid 25 and other contaminants . fig5 is a schematic illustration of an implementation of a separation system 500 according to an exemplary embodiment of the invention . fig5 shows separation system 500 constructed from standard plumbing pipes , connectors and fixtures , as known in the art . the plumbing elements may be standard ⅜ ″ ½ ″ or ¾ ″ ( or other size ) connectors and pipes or may be larger or smaller depending on the size required . the pipe may also be welded or soldered . in some embodiments of the invention , the system may be very large ( e . g . several meters high ) or very small ( e . g . a few centimeters high ), depending on the application . in some embodiments of the invention , the plumbing elements are comprised from standard plumbing materials as known in the art , for example plastic , rubber , copper and / or other metals or materials that are commonly used . in an exemplary embodiment of the invention , separation system 500 is supported by being attached to a supporting board 150 , to hold the elements of the system in place without relying on separating system 500 to support itself . optionally , supporting board 150 can be the wall of a building or any solid structure . as described above for separation system 100 , separation system 500 comprises two pipe chambers 10 and 20 connected together on the bottom with a pipe 50 . separation system 500 further comprises a lighter fluid outlet 30 , a heavy fluid outlet 40 , a mixture inlet 95 and a waste outlet 55 with a valve 65 . optionally , chambers 10 and 20 are vented to the atmosphere to eliminate the buildup of pressure in the chambers . similar to the secondary purifying level 85 for the heavy fluid , shown in fig4 , separation system 500 is shown with a secondary purifying level 120 for the lighter fluid . residue of any heavy fluid or other contaminant that managed to exit from outlet 30 will be trapped in a pipe 130 , and blocked by a valve 125 . by periodically opening valve 125 the residue heavy fluid can be drained out . it some embodiments of the invention , separating system 100 can be constructed using other methods , for example , using a mold to create it from plastic , glass , asbestos or any other material , the same being flame resistant , if need be . in some embodiments of the invention , separating system 100 can be heated or constructed with built - in heating elements in order to accelerate the separation process of the fluids . in an exemplary embodiment of the invention , shown very schematically in fig6 , a liquid printing system 600 , has a print engine 602 , utilizing a volatile carrier liquid , which may , for example be , isopar h , i , j , k or l or other volatile hydrocarbons or other volatile liquids . system 600 , generally includes an enclosure 601 , for keeping the evaporated liquid from escaping . of course , openings are provided for the paper input and output , but otherwise , the printer is closed , except for inlets for air . during the printing process the carrier liquid evaporates and exits the printer through a ventilation system , generally shown at 604 . by cooling the air that exits through an air exit 606 , by passing the evaporated liquid , mixed with ambient air , past a cooling element 608 of a cooling system 610 , the carrier liquid , together with water from the ambient air is condensed . the carrier liquid can then be recovered for reuse in the printer and the water purified to an extent that it can be discarded without special precautions being taken . optionally , a closed system can be constructed , as shown in fig6 , in which a separator 612 , which allows continuous use of the printer with little or no addition of oil , is part of the printer . alternatively , the mixture of oil and water is removed and separated outside of the printer . alternatively , it is separated in the printer , but not used in a closed loop replenishment system . in an exemplary embodiment of the invention , a separation system such as system 100 , 200 , 300 , 400 or 500 shown in fig1 - 5 is used as separator 612 to separate the fluids collected from the printing system . the oil collected by the system is reused by the printer and the water is discarded . the present invention has been described using non - limiting detailed descriptions of embodiments thereof that are provided by way of example and are not intended to limit the scope of the invention . it should be understood that features and / or steps described with respect to one embodiment may be used with other embodiments and that not all embodiments of the invention have all of the features and / or steps shown in a particular figure or described with respect to one of the embodiments . variations of embodiments described will occur to persons of the art . it is noted that some of the above described embodiments may describe the best mode contemplated by the inventors and therefore include structure , acts or details of structures and acts that may not be essential to the invention and which are described as examples . structure and acts described herein are replaceable by equivalents which perform the same function , even if the structure or acts are different , as known in the art . therefore , the scope of the invention is limited only by the elements and limitations as used in the claims . when used in the following claims , the terms “ comprise ”, “ include ”, “ have ” and their conjugates mean “ including but not limited to ”.