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Central Alberta

750mm Line Stop 

N.S. Pawliuk completed a double 750mm line stop on an AWWA C-301L concrete cylinder during the 2023 construction season.

Materials Selection

  • Line Stop Fitting: JCM 445, epoxy coated carbon steel line stop fitting with 304 stainless steel straps.

  • 304 Stainless steel fasteners used throughout. 

Key Points

  • This line stop required a 24" hot tapped outlet. 

  • This thick pipe required drilling through aggregate, and special concrete cylinder fittings compliant with AWWA's M9 specification. 

36" CCP Line Stop With Truck.JPG
IMG_4077.jpeg
This is the side-profile of the cut out section of pipe, referred to as the coupon. Over 1.5" of cement was cored through. 
24" Diamond Tipped Cutter.jpeg
The access hot tap (in order to get the line stop plug into the pipe) required a 23" diameter hole. The cutter was a segmented diamond abrasive style. Notice the coupon retention devices on the pilot bit, which ensure that the coupon is retained. 
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