VIVOSUN 800GPH Submersible Pump(3000L/H, 24W), Ultra Quiet Water Fountain Pump with 10ft. High Lift with 6.5ft. Power Cord, 3 Nozzles for Fish Tank, Pond, Aquarium, Statuary, Hydroponics Green

Sound level is very good for a pump of this flow. I bought it to use in a Low-Pressure Aeroponics setup – emphasis on learning about LPA without breaking the bank. The outside casing makes it look like about 50 other water pumps carrying various names at similar price points and advertised flow rates, but it puts out more than twice the water of a nearly identical-looking 640GPH pump, and my misting heads can be tightened enough to produce very fine mist without stopping the flow altogether. This little 800GPH pump is likely a little less powerful than it claims, as the lift height is stated at 10′, and at 6′ the water flow is quite restricted. But for a small, cheap “testing” setup, it works great even with 10 misting heads on 1/4″ PEC irrigation tubing. The fittings seat and seal well on the pump outlet, and a spare suction cup is included in the box. Also of interest, the noise level is actually lower than my 640GPH pump. Wattage is as specified, with very occasional increase/decrease, and connecting it to my 1500VA/900W UPS system barely increases the load, dropping the 450-minute “unloaded” reserve capacity by just 12 minutes. Running only this pump on it I would have more than 7 hours of water flow if the power goes out. The pump itself is about twice the size of the 640GPH, and more than twice the weight. Mounting it to the side of a reservoir requires an absolute minimum water depth of 5.5″, and with a “Y” splitter in the outlet for balanced pressure in a looped irrigation setup I recommend placing one of the nipples on the pump outlet and using tubing to connect the splitter so you can lay the splitter flat in your reservoir and place the pump upright on the bottom as there are water intakes that must both be submerged on both ends of the pump. Using 1/4″ irrigation tubing without a cap and free-flowing, the inlet flow control at the front makes no noticeable difference in the amount of water flow, so if precision flow is required you’ll need inline valves, but for my setup, adjusting the misting heads is enough. So far, I’m quite impressed with this little guy, and no longer worried about finding my plants dead from lack of hydration or nutrients. If it lasts awhile, this will have been a great buy – one I highly recommend for smaller LPA hydroponics setups or even a 3-bucket tower or up to 10-bucket Dutch Bucket system. At this price point, I can keep a couple of these on the shelf in case of failure, and if they last 6 months or more in use, they’ll be well worth the cost.