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


Live Mains Insertion is a flexible technique which can be adapted for situations where you have properties shielding during the current Covid 19 pandemic.

Live Gas Mains Insertion During Covid 19