Due to air draw noise, I used a silencer I had here. I then noticed the pump has a Hummm to it that the askoll pump does not have. I have a small room that is used for my tank equipment so its not bothering me, but I could not sleep if it was in my bedroom...
It could be part of break-in, but its alot louder than the resun pump.
BTW, I used 1" Thinwall pvc ( that is what I was told it is called) Its 1" ID, but smaller than normal 1" pvc on the outside, because wall of pipe is thin ..
Because it was smaller- it fit perfect into skimmer body, but I had to wrap teflon tape around it several times (6-7?) to make it fit the union..
reefguard, I would wait to hear what Ken thinks, but as of right now, I think it is powerfull enought for a 280.. It pushes my 180 to the absolute max! Valve is almost all the way open, skimmate production is greatly improved..