very quiet pump. the pipe connection system is well used to disconnect the pump for cleaning in another room without getting water everywhere. the water distribution accessories are a chip can have good but can still change them if you want. by cons I am skeptical about the flow 1000l / h my internal pump 500l / h delivers more, but a good complement for me that turns two. I think it is better to take the 2000l / h after level reliability to do with time