Gas Mains Renewal

SVI pioneered a gas mains replacement technique called Live Gas Mains Insertion.  Thousands of miles of gas mains around the world have been inserted live since the technique was introduced in the 1980s.

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Live Gas Mains Insertion is similar to normal insertion of polyethylene pipe (PE) into an old cast iron main with one very beneficial difference. By using a special gland box, the old main is kept live throughout the insertion process and the new PE is gassed up to maintain gas supplies to customers.

Live Gas Mains Insertion


The NEW 90mm PE Live Head, for Live Mains Insertion is an internally electrofused Live Head which offers a streamlined shape with the Live Head sitting flush with the PE. This allows for easy insertion into a 4” main and makes negotiating bends less challenging. The NEW PE head can also be used on 4-8” mains.

Now Available – 90mm PE Live Head for 4″