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backflush water pipes
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Hanktbd
Posted 11/24/2022 07:55 (#9947408 - in reply to #9946894)
Subject: RE: backflush water pipes



Central IL
Turning it off too quick blew out big water pipes, pressure tested at 120 PSI. I saw the damage of a 12" blow-off valve closed too quickly on a 30" waterline between the intakes and water plant, pumping by 2 150 hp pumps. Blew out 16 joints of pipe....James

Water Hammer effect. Seen it peel the shaft off a 100 hp centrifugal quench pump motor when the solenoid was slamming the valve closed too fast. Lost 2 motors before the maintenance guys figured it out.
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