Let’s face it, sometimes an overflow box can get very loud and if you are driving a lot of water through a tiny 1″ drain, you will be rewarded with the most obnoxious irregular sucking sound that is sure to drive the spouse mad. The sucking, gurgling sound is the result of all the draining water trying to suck in air as it flows down the drain tube. In the recently posted video above, Eshopps demonstrates how to insert a piece of airline tubing into the drain of your overflow box in order to act as a snorkel and regulate the flow of air going into your water drain line. This technique simulates the regulation of air that is the key to silencing draining water like the Durso/Stockman overflow modification. Keep in mind that the diameter of your airline tubing will need to be proportional to the amount of water you are draining: For a single U-tube you might get by with 1/8″ diameter tubing but for two U-tubes of water flow you’ll need a 1/4″ diameter airline like the one used in the video. Thanks to Eshopps for filming this easy and useful silencing trick.