- See that refilling of trenches is not done, until the laying and jointing of pipe line have been passed by the Engineer-in-Charge and the necessary tests have been carried out.
- Spoil obtained from excavation of the trenches shall be entirely re-used except vegetable or black cotton soil which is prohibited for refilling. The finest spoil is to be selected and carefully filled in around the pipes, etc, before the man filling is done.
- See that the filling of earth/moorum is carried out properly in layers not exceeding 20 cm thick, well watered and rammed.
Pits
- See that masonry pits of proper size with CI manhole covers are built as specified.
- Check that CI boxes for valves/meters are of approved type, predesignate, confirming to IS specifications.
- Ensure that CI frames and covers for manholes are of correct type, pattern aid weight.
- See that manhole covers, frames are given bituminous paint all-over and greased at the seat.
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