Overflow Box Standpipe Silencer 1" for build-in overflows from 18 to 30" tall. Just install Aqua-Silencer in your 1" bulkhead overflow and listen. You will be amazed at the difference in noise level.
Eliminate the gurgling noise associated with water flowing into a standpipe or bulkhead.
Eliminate the waterfall effect noise of water entering the overflow by optimizing the height of the pipe to your tank
Designed to prevent the pipe from getting clogged by small creatures.