Water Hammer: Causes & Solutions

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SUMMARY

Water hammer occurs due to rapid changes in water flow, particularly when valves are closed quickly, creating shock waves in the plumbing system. The frequency of water hammer incidents can vary based on how quickly valves are operated. Appliances like dishwashers and washing machines influence fluid dynamics, affecting the occurrence of water hammer. Understanding these dynamics is crucial for effective plumbing management.

PREREQUISITES
  • Fluid dynamics principles
  • Understanding of valve operation in plumbing systems
  • Knowledge of plumbing system components
  • Familiarity with water hammer arrestors
NEXT STEPS
  • Research the installation and function of water hammer arrestors
  • Learn about fluid dynamics in plumbing systems
  • Investigate the impact of valve types on water hammer occurrence
  • Explore solutions for mitigating water hammer in residential plumbing
USEFUL FOR

Plumbers, homeowners experiencing water hammer issues, and engineers involved in plumbing system design and maintenance.

wolram
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Why does water hammer come and go, i can turn my hot tap on say ten times, and the water hammer will only occur six times.
http://en.wikipedia.org/wiki/Water_hammer
 
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It depends on how quickly you open and close valves. If you close a valve quickly, the water inside the plumbing still has velocity but no where to go, so you get a shock wave. If you close the valve slowly, the fluid in the plumbing has time to slow down. If you have dishwasher, washing machine, etc, drawing water then this effects the fluid dynamics in the plumbing.
 

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