Water hammer is one of those problems that rarely announces itself during design reviews. On drawings, tall fire risers look orderly and predictable—vertical pipe runs, zone valves at clean intervals, pumps sized with comfortable margins. Everything appears controlled.
Then the system is tested.
Or worse,...
Malay 
English 
Arabic 
Spanish 
Italian 
Russian 
Portuguese 
German 
French 
Dutch 
Japanese 
Vietnamese 
Korean 
Thai 
Danish 
Swedish