This is a Super Pond pump is made by Sunsun, the worlds largest aquarium and pond pump manufacturer. This unit pumps 8000 litres per hour and will pump 2000 litre per hour at a head of 2.5 metres.This is the smallest pump in a series from 8,000 litres to 18,000 litres Pplease see my other listings for pond pumps and fountains. Discharge connection is 25 mm up to 37 mm. It uses ceramic shaft technology for extra long life and has an extra long flex of 10 metres (check other pumps for the flex length ).. This pump consumes 70 watts of power and is of a very well proven design. This unit has a 24 month back to base warranty. This pump will give you years of great service. We have full parts support for these pumps. We use this pump to power our CPF 380 pond filters and they are very reliable and low maintenance. Prompt dispatch. Questions welcomed.