Pumps are destined for pumping clean and polluted water of high density, e.g. faeces, sludge with a content of fine and fibrous particles up to diameter 20mm. Pumps can be also used for emptying or filling tanks, pumping water out of water wells, pools, pumping water out of flooded spaces, for watering, etc. Pumps have got overcurrent and thermal protection (clixon type) – it is not necessary to protect it particularly.