The simplest way of dealing with the ballcock issue is to replace it with a new one. If the sound is no more, you know where the problem lies. You can experiment with the flapper by flushing and lifting the flapper to the surface and see if the foghorn sounds stop. Alternatively, if the flapper is loose, it doesn’t close properly and oscillates in between which creates a loud echo. If the flapper is broken or not adjusted properly, the water keeps on filling past the overflow valve and makes a foghorn sound while doing so. However, a deteriorating flapper might be the reason for the hissing sound you hear. It turns on while the water is entering the tank and collapses when the tank is filled. A ballcock, also known as a fill valve or flapper, is a mechanism installed into the tank of the flush and it is responsible for bringing water into the tank while avoiding backflow or overflow. Compromised ballcock in a toiletĪ defective toilet ballcock is the most common reason leading to foghorn sounds from plumbing in the bathroom. Let’s see what causes plumbing to make such bizarre sounds out of nowhere. One should not ignore the noises as they can be an early warning sign of a more serious plumbing issue. The sound seems like a loud humming like that of a siren. One such common problem is plumbing making sounds like a foghorn which makes no sense at all. The large web of pipes, vents, drains, and sewer lines underneath the floor can be complicated to understand. Plumbing issues are rather complex and confusing for someone with little or no related knowledge. Another foghorn at midspan between the towers sounds a pair of high-pitched notes.If your plumbing makes you feel like you are in a middle of an ocean trying to strafe a ship through the fog and following the loud foghorn then it’s time to ‘dive deeper’ and fix the issue at hand. The south tower foghorn sounds a deep, loud note for 2 seconds, then it repeats in 18 seconds. When it's foggy you can hear the sound from the south tower instantly by telephone, 41. Then, wait about 2 seconds to hear the sound waves reach your ears through the air, traveling a little faster than a jet airliner. If you live in San Francisco, here's something to try next time there's fog, from the Golden Gate Bridge website: For more information about these and other fog horns in San Francisco Bay, visit: Into the recording a small plane can be heard flying overhead. Also audible is the surf below the cliffs of Lands End. I believe two of these are located on the nearby Golden Gate Bridge itself and another may be at Point Bonita on the Marin Headlands, 2.5 miles west of the bridge. There are four separate fog horns audible, each with specific characteristics such as direction, intervals and frequencies two are single, two are double. Years later I converted the recording to digital for posterity. The coordinates are approximately N 37 degrees 47' 14' W 122 degrees 29' 40.5'. This recording was made late in the evening on the foggy night of August 29th, 1987 from Lands End near Lincoln Park in San Francisco, using fairly inexpensive stereo equipment. Many of the foghorns in San Francisco Bay can never be heard again as they have been replaced by more advanced technology… In the late '80s, my dad recorded the foghorns of San Francisco on tape for my mother.

Fog horn sound