Water hammer

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wolram
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Boy do i have water hammer, it sounds like some huge fog horn and is enough to make one jump out of ones pants, it comes unexpectedly, and when i have a bath the hot water dries up to the kitchen sink, the Romans had better plumbing than mine.
 

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Danger
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enough to make one jump out of ones pants
That sounds pretty handy. You should take it to the pub with you the next time you're horny.
 
Ivan Seeking
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You could just have a water-logged arrester as well.
 
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If you don't have the cash to buy an arrestor try installing an empty 2 liter soda bottle inline. p.s. I totally made this up and have no idea if it would actually do anything at all.
 
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A water hammer is actually an energy source. The action in the pipes gives off a lot of heat. i believe it is caused by some sort of cavitation. They do generate a lot of energy, however They are not a workable power source yet.

http://goliath.ecnext.com/coms2/gi_0199-7127158/Put-wasted-power-from-water.html [Broken]
 
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Chi Meson
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My kids call it "the pipe singer" and they all get real excited when it makes its noise. Tonight it went on for about 30 seconds.

Deja vu. Have I already told this one before?
 
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Speaking of Deja vu, has there ever been a thread about that occurence?
 
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glondor wrote: they are not a workable power source yet.

probably not in house pipes, but controlled water hammer is what 'drives' hydraulic ram water pumps.
 
Chi Meson
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A water hammer is actually an energy source. The action in the pipes gives off a lot of heat. i believe it is caused by some sort of cavitation. They do generate a lot of energy, however They are not a workable power source yet.

http://goliath.ecnext.com/coms2/gi_0199-7127158/Put-wasted-power-from-water.html [Broken]
Certainly a mechanism for the delver of energy, but not a "source."
 
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Astronuc
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Water hammer (or, more generally, fluid hammer) is a pressure surge or wave resulting when a fluid in motion is forced to stop or change direction suddenly.
from Wikipedia - but it's reasonably accurate.

Cavitation may be an initiating factor, by virtue of the cavity (vapor phase) collapse and the rapid development of a wave along a pipe.

If there is a banging in hot water pipes, that could be a check valve abruptly closing or a steam bubble collapsing.

I've experience a rather large water hammer in 1.5 m pipe header at water production facility. A rather large check valve closed abruptly when the water pumps tripped off. The was a rather large bang and building shook and vibrated.
 
wolram
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from Wikipedia - but it's reasonably accurate.

Cavitation may be an initiating factor, by virtue of the cavity (vapor phase) collapse and the rapid development of a wave along a pipe.

If there is a banging in hot water pipes, that could be a check valve abruptly closing or a steam bubble collapsing.

I've experience a rather large water hammer in 1.5 m pipe header at water production facility. A rather large check valve closed abruptly when the water pumps tripped off. The was a rather large bang and building shook and vibrated.
I bet that made you jump, the boiler at work is good at making such noises, if it cuts out and has cooled the restart is quite scary, the first time i had to restart it i ran for cover.
 

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