I don't use that type of drain, BeanAnimal all the way. I'll never go back to anything else.

The only ones that I have seen that are quiet run at really slow rates, and the U over the top has holes in the side of it and there is a breather hole at the top of the pipe to let air in and keep it from flushing, never seen someone run it with a valve. Dunno. Off topic for this thread, might try starting one specifically for your tank (consolidate your threads into one covering all issues)