Specific steps for the use of flexible waterproof casing.

Flexible waterproof casing pipe bearing mouth inside and outside of the socket flying spur, cast sand, etc. should be shoveled off in advance, asphalt paint with a blowtorch or gas welding baked off, and then remove dirt with a wire brush.
 
Place the valve, fittings steadily in the prescribed position as a reference point. Transport the cast iron pipe to the edge of the trench along the pipe trench, with the bearing mouth facing the direction of incoming water.
 
Use a large rope to clean up the cast iron pipe to the bottom of the trench, clean up the socket, and then insert the installation pipeline, the socket interface straight positioning.
 
Installation of flexible waterproof casing fittings, valves, etc. should be positioned accurately, the valve stem should be vertical up.
 
According to the length of cast iron pipe, determine the location of the pipe section work pit, before laying the pipe to dig a good work pit.
 
Outdoor underground fire hydrant base with a prefabricated concrete pad or cast-in-place concrete pad, the following soil requirements rammed.