Water hammer

  • Thread starter wolram
  • Start date
  • #1
wolram
Gold Member
4,330
559
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.
 

Answers and Replies

  • #4
Danger
Gold Member
9,647
251
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.
 
  • #5
Ivan Seeking
Staff Emeritus
Science Advisor
Gold Member
7,842
993
You could just have a water-logged arrester as well.
 
  • #6
731
6
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.
 
  • #7
60
0
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]
 
Last edited by a moderator:
  • #8
Chi Meson
Science Advisor
Homework Helper
1,807
10
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?
 
  • #9
239
0
Speaking of Deja vu, has there ever been a thread about that occurence?
 
  • #10
4
0
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.
 
  • #11
Chi Meson
Science Advisor
Homework Helper
1,807
10
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."
 
Last edited by a moderator:
  • #12
Astronuc
Staff Emeritus
Science Advisor
19,959
3,488
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.
 
  • #13
wolram
Gold Member
4,330
559
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.
 

Related Threads on Water hammer

  • Last Post
Replies
2
Views
645
  • Poll
  • Last Post
Replies
17
Views
3K
  • Poll
  • Last Post
Replies
8
Views
2K
  • Poll
  • Last Post
Replies
11
Views
2K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
4
Views
2K
  • Poll
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
9
Views
9K
  • Last Post
Replies
7
Views
3K
Top