plumbingdummy
Member
Hi all,
I have an irrigation system that runs in the middle of the night. Starting several nights ago, right after the system comes to the end of its run with a sprinkler in the back yard, I hear a low rumbling/rattling/vibrating/pulsating type noise that I believe is coming from under the house. The first time that I paid attention to it, it lasted for about 5 minutes. Last night the same thing occurred, but several minutes after it had stopped, it started up again. I got it to stop by shutting off the entire water supply. When I turned the water supply on again this morning, that noise did not start up again.
The main supply pipe comes into the one-story house below the bathroom. Just inside the foundation a branch goes off to the front yard irrigation. Somewhere else under the house another branch goes off to the back yard irrigation.
Where I hear the noise the loudest, is in the bathroom--even louder then when I am outside right next to where the main supply pipe enters the house.
The irrigation run starts with two successive zones in the front yard, and ends with three successive zones in the back yard.
It may be that whatever is causing this new noise that I hear after the irrigation system is done has actually started during the irrigation run--but the normal irrigation run noise is so loud that it would be masked.
Does anybody have any idea what could be going on?
Could this have anything to do with siphoning from the irrigation system? (Although I do have anti-siphon valves.)
I have an irrigation system that runs in the middle of the night. Starting several nights ago, right after the system comes to the end of its run with a sprinkler in the back yard, I hear a low rumbling/rattling/vibrating/pulsating type noise that I believe is coming from under the house. The first time that I paid attention to it, it lasted for about 5 minutes. Last night the same thing occurred, but several minutes after it had stopped, it started up again. I got it to stop by shutting off the entire water supply. When I turned the water supply on again this morning, that noise did not start up again.
The main supply pipe comes into the one-story house below the bathroom. Just inside the foundation a branch goes off to the front yard irrigation. Somewhere else under the house another branch goes off to the back yard irrigation.
Where I hear the noise the loudest, is in the bathroom--even louder then when I am outside right next to where the main supply pipe enters the house.
The irrigation run starts with two successive zones in the front yard, and ends with three successive zones in the back yard.
It may be that whatever is causing this new noise that I hear after the irrigation system is done has actually started during the irrigation run--but the normal irrigation run noise is so loud that it would be masked.
Does anybody have any idea what could be going on?
Could this have anything to do with siphoning from the irrigation system? (Although I do have anti-siphon valves.)
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