A water tender, also known as a tanker in some regions, is a specialized firefighting apparatus designed for transporting water from a water source to a fire scene. Water tenders are capable of drafting water from a stream, lake or hydrant. This class of apparatus does not necessarily have enough pumping capacity to power large hose lines (like a fire engine), though it utilizes a smaller pump to draft from bodies of water. Water tenders are used when there is not a working fire hydrant within reach of other fire equipment, or a water tender gives a possibility to supply the fire engine (s) with a very rapid connection. Most water tenders are designed to carry loads of 1000 gallons (approx. 3800 litres) or more. In the US, 1000 gallons is the requirement in the NFPA standards. Some may carry up to or even upwards of 5000 gallons (approx. 19,000 litres) of water with a trailer even more. Typically water tenders support engines and/or trucks like aerials in fires. Water tenders can be used also in chemical accidents, to clean highways after collisions, or pump water in floods. Some water tenders carry fire fighting equipment and crew resembling more an engine. These water tenders are able to operate relatively independently. As the most ultimate solutions some water tenders really combine a fire engine and water tender. This kind of unit may have seats for up to six firefighters, a water tank of more than 3000 gallons (approx. 11 000 litres), and basic equipment for fire fighting and rescue. This kind of solution is known, for example, in rural areas, where a fire engine (with rescue equipment) and water tender are supported by a combined fire engine/water tender unit in overlapping fires or accidents