Description: The max flow rate of this powerful and energy efficiency magnetic drive pumps is 3500 gallon per hour @ 1FT. This versatile pumps can be used submerged or inline, positioned horizontally or vertically, to drive larger waterfalls, larger pond filtration systems, or any other pond installation. Uses only a fraction of the energy of comparable models. This pumps come with a female coupling to adapt to standard pipe thread fittings. Features: 1. Designed specifically for large pond installations including waterfalls and pond filtration 2. Vertical and horizontal use 3. Oil-free pump is safe for fish 4. High performance, sturdy asynchronous motors 5. Can pump dirt particles of size up to 6mm 6. Vortex impeller with wear-proof ceramic shaft 7. Suitable for Inline Use: YES 8. UL Listed 9. Two stepped-down horsetail adapter included 10.One 1-3/4" BSP male PVC fitting included