Details: [20.49.3]bailing out water from the trenches for making new connections in fully charged pipe-lines including cleaning trimming and dressing the trenches to correct alignment and grade as required by the engineer-in-charge. size of the main with which connection is to be made. 3. exceeding 300 mm internal diametre but not exceeding 450 mm internal diametre [20.49.4]bailing out water from the trenches for making new connections in fully charged pipe-lines including cleaning trimming and dressing the trenches to correct alignment and grade as required by the engineer-in-charge. size of the main with which connection is to be made. 4. exceeding 450 mm internal diametre but not exceeding 600 mm internal diametre [20.5.10]making flanged joints for cast iron pipes, valves or specials 10. 450 mm internal diameter of pipe, values or specials [20.5.11]making flanged joints for cast iron pipes, valves or specials 11. 500 mm internal diameter of pipe, values or specials [20.53.10]
Sector: General Admin