VIVOSUN Air Pump Kit, with 40 W 1110 GPH Commercial Air Pump, 8-Way Splitter, 2 Pcs Air Stones, 25 ft Air Tubing, 2 Pcs Check Valves, for Aquarium, Fish Tank & Hydroponics

The media could not be loaded. So, I was not happy with this at first. Did a LOT of googling and YouTube searching. I now have a nice quite pump, and the fix was actually pretty easy. I don't have a video of how loud it was at first, as the noise came and went, but I have included a final video. What I did should only take about 10 minutes a screwdriver, and some PTFE Thread Tape.1. Tighten all screws (NOTE: it seemed to me all the holes in the aluminum casting where a bit sloppy, so I loaded each external screw with Teflon Tape, and reinstalled them).2. Add Teflon Tape to the Brass nozzle barb (that also felt loose to me).3. Remove the Rear Air Filter, and the 4 screws holding the Piston in place (See Picture).4. Wrap some Teflon Tape around the ball bearing installed. It seemed to me this was where the rattle was coming from. I think the bearing is a little small, or there is more slope in the holes than needed. This cause a slight harmonic rattle.5. Wrap tape (optional) on the screws holding both the rear plate and the air filter housing, and reinstall.6. Run your pump and see if the rattle goes away.A couple notes, most people seem to pinch off their air supplies to only provide the air they need, but this pump isn't a pressure control pump, so it's going to run, regardless of how much air can flow. The better method is to bleed off the excess air you don't need. Take one of your 6 ports (or any other place you want install a bleed valve) and use that valve to bleed off the excess air. My method:1. Connect all airlines and components you want.2. Open any flow controls 100%3. Open your bleed valve (either one of the 6 provided, or someone other valve) 100%4. Turn on the Pjmp5. Start to pinch off the Bleed Valve slowly until you get the air flow out of your connected devices.6. Adjust any local flow valves as needed to balance out air between various components (i.e. Air Stones, Sponge Filters, etc.).7. If needed close the bleed valve as required. There should be some air coming out the bleed valve, unless all your devices need 100% of the supplied air.8. NOTE: If you have more air then you need, take your bleed air, and redirect it back at the pump, and use that excess air to help cool the pump. This will do two (2) things, keep your pump a little, cooler and reduce the load on the pump.If this helps, I would be curious to hear the results. I might make a Youtube Video, if I do, I'll come back end update this review. In the video, I try to contrast the air bubbles to the air pump, so give the pump noise a frame of reference.

I'm going to excellent air pump it but it is a big air pump so the noise is assessive however I would highly recommend this air pump because it works really good for what it's supposed to do so everybody that says it's super loud it is loud but that is what an air pump that size sounds like thank you

Product arrived in a totaled Amazon box, as they no longer back with air pockets.But the pump survived unscathed, even though clearly dropped. I also dropped it from 6ft high onto a hard floor when it toppled off the shelf while running, and it didn't phase it.Things to note: I wanted to modify this to use as a gentle vacuum pump. I was pleasantly surprised to find the plastic intake cover had a tight sealing rubber o-ring. No modification necessary, this is a mild vacuum pump out of the box.I plugged it in and it ran immediately, no power switch. Reliable and cheap.After placing a finger over the end, I determined it was a very low pressure pump, as the manufacturer stated.So I rigged up a suction tube to lift water out of a container on the floor. Placed the pump on the counter, and flipped it on. It immediately lifted the water and sucked in into the pump, and it shut down abruptly. Oh no! I ruined it...Nope. Poured water out of the pump itself, plugged it in another outlet and confirmed it worked just fine. It was the GFCI breaker that tripped. (They work too!).I then unplugged it and tipped it. More water came out! I had failed to dry it out completely from before! This pump; you almost cant destroy it!Now to test the vacuum by lifting water... Placed on a high shelf with a 10ft clear suction tube to the floor, over 6' of elevation. The pump pulled the water right to 46.5", subtract 2.75" remaining in the container for 43.5" wc (water column) of vacuum.This equates to 1.57psi, or 226lb/ft.~ 10.8kPa of vacuum. (1,1m wc).This is a very good little pump. This was the basic lowly 15w. Higher power may produce better performance. I'm happy with this.4.5 stars instead of 5, because they state it requires a 1/4" ID tube. This is 6.35mm, to the actual 8.0mm outlet diameter. You need a tube between 7-8mm to fit easily.Also, the suction input is 8.9mm; 10.25mm over the barbs. So you need a 9-10mm tube here.Blow: 9/32" to 5/16"Vac: 5/16" to 3/8"Get the 5/16" heat the tube to fit.