Energy-efficient gravity filter pump for large bodies of water, even with koi – perfect for gravity filter systems. Thanks to the flow-optimised hydraulics, this powerhouse achieves outstanding efficiency (51,000 l/h flow rate with a power consumption of just 320 W max.). With robust cast stainless steel pump housing and large base for secure positioning. The high-quality SIC ceramic rotor shaft and bearings stand for reliability and durability. The AquaMax Eco Titanium 51000 can be submerged and installed dry – also ideal in a pump chamber. It pumps coarse dirt up to 6 mm grain size and is reliably protected against dry running and blockage thanks to "Environmental Flow Control" (EFC by OASE). The patented "Seasonal Flow Control" (SFC) as an intelligent and environmentally conscious regulation of the water volume and delivery head enables additional energy savings of up to 30 % with the help of optional accessories and with the SFC function switched on – precise and reliable engineering "Made in Germany" at a particularly high level. Up to 5 years guarantee – 3 plus 2 years requirement guarantee.