The suction height defines the height difference that can be overcome between the component at the heart of the pump, the paddle wheel, and the surface of the water. The suction capacity is based on the atmospheric air pressure under real conditions, as a result of which pumps generally face a physical limit of around 10 meters.
Service water is water that is pumped by means of a pump from a well, shaft or cistern. Service water is not potable and must not be used for drinking water or for the preparation of food. In private households, service water can be used in separate outlets away from the drinking water supply as a supply for toilet flushing systems or washing machines, or as cleaning water.
The delivery pressure describes the pressure with which the pump acts on the fluid being pumped. The higher the force of the pump used for pumping, the higher the pressure. Pressure is generally measured in bar, occasionally also in pascal. 100 kilopascal corresponds to a pressure of one bar.
The delivery head describes the difference in height between the pump and the outlet of the water from the connected hose/sprinkler (caution: in the case of pumps that are submerged in water, the position of the pump is not used, but instead the height of the water surface).
The delivery rate, also referred to as the pumping capacity or suction capacity, describes the pumping capacity of a pump and is normally stated in 'liters per hour' (at Einhell). The delivery rate can also be described as a volumetric flow or flow rate, where the units 'cubic meters per second' are used.
Clear water is slightly contaminated waste water with no particulate content. This includes waste water from personal hygiene, but not kitchen waste water, which is excluded because of the high levels of oils and bacteria from food waste. Clear water is not potable and must not be used for drinking water or for the preparation of food.
Dirty water is the combined total of all waste water in the household and in commercial or agricultural operations, and it is heavily contaminated with bacteria. Dirty water must be purified via mechanical, chemical or biological means before it can be fed back into the water circuit.
Pre-filters prevent the ingress of contamination into the pump. Their use is always recommended if the pump is expected to pump water that may be contaminated and may contain sand or dirt particles.
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