The peripheral pumps, so called because the peripheral edge of the impeller contains numerous radial blades, designed to yield energy to the fluid being pumped. The particular shape of the blades rapidly transfers radial re-circulation motion to the fluid on entry to the pump, between the impeller blades and the double channel, machined o each side of the pump body, since each of the numerous blades helps transfer energy, the fluid pressure increases high pressures with particularly steep curves. The relatively simple construction technology embodied in the series nevertheless requires particularly accurate mechanical machining during manufacture to prevent a drop in performance. These pumps are suitable for handling clean water not containing abrasive particles and fluids which are not chemically aggressive to the pump components. Reliable, economical and simple to use, they are suitable for domestic applications and the automatic distribution of water from surge tanks, watering gardens and for boosting insufficient mains water pressure. These pumps should be installed in a covered area, protected against the inclement weather.