Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > aus.electronics > #35508

Re: Totally OT: Water tank weirdness

Cross-posted to 2 groups.

Show all headers | View raw

Sylvia Else <sylvia@email.invalid> wrote
> Rod Speed wrote
>> Sylvia Else <sylvia@email.invalid> wrote

>>> The problem started with the appearance of dust and grit falling into  
>>> the bath. It was not at all obvious where it was coming from. With  
>>> showers being preferred, the bath is little used, so this wasn't  
>>> coming from the taps. I climbed into the roof space above the  
>>> bathroom, but nothing was apparently amiss.
>>>
>>> In the roof space there is an old tank, which I surmise was once the  
>>> hot water tank. It has long been unused, and was presumably left there  
>>> because it would be difficult to remove, and there was no compelling  
>>> reason to do so. There is also some pipework that I had originally  
>>> presumed was unused.
>>>
>>> It's very dusty up there, and I have to wear a proper filter mask. As  
>>> I was returning the mask to the garage area below the living area of  
>>> the house, where I keep such things, I heard a noise coming from the  
>>> hot water tank. Turned out there was a leak from where the heating  
>>> element goes in. Given that the tank is under pressure, the leak was  
>>> making a hissing noise.
>>>
>>> Now, some years ago, I tried to trace the origin of the water-hammer  
>>> noise, searching under the house without success.
>>>
>>> My visit to the roof space made me wonder whether that pipe was really  
>>> unused. Indeed it appears to have been sealed off. I now think that  
>>> one part of it goes down the wall into the garage area to join the hot  
>>> water output, with the other part heading down to the laundry. And  
>>> where it goes down the wall is close to where the dust and grit is  
>>> falling into the bath.
>>>
>>> All of which makes me think that the dust and grit in the bath and the  
>>> leak in the hot water tank are not unrelated. My theory is that this  
>>> is the pipe that makes the water-hammer noise, given that it's not  
>>> well attached to the framework,
>>  That's not the reason for water hammer.
>>
>>> and that the tank leak changed the hammer  pattern enough

>>  Due to air getting in.

> Given that the tank is under pressure, I can't see how air could get in.

> Any hole results in water coming out, not air going in.

Its more complicated than that, there is air at the top of the hot water  
cylinder.

Back to aus.electronics | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

Totally OT: Water tank weirdness Sylvia Else <sylvia@email.invalid> - 2022-05-17 12:37 +1000
  Re: Totally OT: Water tank weirdness Noddy <me@home.com> - 2022-05-17 12:53 +1000
    Re: Totally OT: Water tank weirdness Sylvia Else <sylvia@email.invalid> - 2022-05-17 13:39 +1000
      Re: Totally OT: Water tank weirdness Noddy <me@home.com> - 2022-05-17 20:30 +1000
    Re: Totally OT: Water tank weirdness Xeno <xenolith@optusnet.com.au> - 2022-05-17 15:57 +1000
    Re: Totally OT: Water tank weirdness "Rod Speed" <rod.speed.aaa@gmail.com> - 2022-05-18 11:24 +1000
  Re: Totally OT: Water tank weirdness Daryl <dwalford@westpine.com.au> - 2022-05-17 14:10 +1000
  Re: Totally OT: Water tank weirdness "Rod Speed" <rod.speed.aaa@gmail.com> - 2022-05-18 11:08 +1000
    Re: Totally OT: Water tank weirdness Sylvia Else <sylvia@email.invalid> - 2022-05-18 12:46 +1000
      Re: Totally OT: Water tank weirdness Peter Jason <pj@jostle.com> - 2022-05-18 13:43 +1000
      Re: Totally OT: Water tank weirdness "Rod Speed" <rod.speed.aaa@gmail.com> - 2022-05-18 14:32 +1000

csiph-web