Glass standpipes with a constriction. Similar to C+25+10.

Glass standpipes with a constriction. Similar to C+25+10. his set of glass tubes has a constriction on this part of the bottom pipe. The velocity of the water increases at the constriction. Water velocity increases at the constriction of the bottom tube,causing a pressure drop and a drop in the height of water in the vertical tubes in that region.
UCB Index: 
C+25+11
PIRA Index: 
2C20.15
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Demo Picture: 

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