What is the difference between a drop tank, a re-circulating tank and a fresh water tank?
All the above are types of waste tanks and their systems. A drop tank is an open tank, which has no frills and like the name suggests it is used as a popular toilet for construction sites, roadsides and places where one needs to have a quick job and get on with it. Often referred to Porto-Let, Port-O-Potty, Portable Restrooms, Portable Toilet, J-John or one of many other nicknames, the system has no flushing facility. Hand wash water can be provided inside this particular unit with a capacity of about 100 liters. The water though can be used only for hand wash and for washing of ablutions. It cannot substitute a flush. The Re-circulating tank takes the deodorized liquid and provides home-like flushing. In this tank, fresh water is run into the waste tank. The bio-chemical is then added to this water, which turns it blue. The unit is now ready for use. As the unit is used the solid waste settles down to the bottom of the waste tank leaving the clear water above. The unit has a re-circul
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