Central Alberta
Double 750mm Line Stop
N.S. Pawliuk completed a double 750mm line stop on a steel potable water main during the 2024 construction season.
Materials Selection
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Line Stop Fitting: CS High Performance Pipeline Products, a Canadian-made NSF61 thermoplastic coated linestop fitting.
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Bypass Tapping Sleeve: Romac FTS420 "Romacoat" NSF 61 fusion bonded-epoxy coated A-36 carbon steel.
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Bypass tapping valve: Clow F6102 resilient wedge gate valve conforming to AWWA C509.
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304 Stainless steel fasteners used throughout.
Key Points
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These line stops allowed for a 750mm valve and a 750mm outlet to be cut in to the transmission main without disrupting service.
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A 300mm temporary bypass pipe, which had been hot tapped in, was run around the work area to maintain service.
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As with all hot taps, the tapping sleeves and line stop fittings had been pressure tested to ensure materials were free from leaks.
The pipe has been cut open. Note that behind our line stop equipment, the 750mm main is under full flow and pressure.
This photo was taken prior to the pipe being cut open.
