3.02
3.03
C.
pipeline at the joints. Where there is evidence of water or soil entering the pipeline, connecting
pipes, or structures, the defects shall be repaired to the satisfaction of the Engineer.
The Contractor shall build a tight bulkhead in the pipeline where new work enters an existing
sewer. This bulkhead shall remain in place until its removal is authorized by the Engineer.
Care shall be taken to prevent earth, water, and other materials from entering the pipe, and when
pipe laying operations are suspended, the Contractor shall maintain a suitable stopper in the end
of the pipe and also at openings for manholes.
As soon as possible after the pipe and manholes are completed on any street, the Contractor shall
flush out the new pipeline using a rubber ball ahead of the water, and none of the flushing water
or debris shall be permitted to enter any existing sewer.
A tracer tape shall be placed in the trench as specified in Section 02518, TRACER TAPE.
CLEANING:
On completion of a section of sewer, the Contractor shall TV inspect the main section in
accordance with Section 02441, Cleaning and Television (CCTV) Inspection of Pipelines at
no additional cost to the Owner.
TESTING
Testing of pipe joints to identify joints that are defective shall be performed using either liquid
or air, at the Contractor's option. Test pressure used shall be acceptable to the Engineer.
The allowable pressure drop shall be 0.5 pounds in 15 seconds at a pressure greater than % pounds
per vertical foot of pipe cover, or 4 pounds minimum.
Electronic video equipment shall be capable of displaying and recording, at a minimum, the
following data for each pipe joint:
1. Project Identification
2. Date recorded
3. Footage counter
4. Test pressure
5. Sewer reach identification (street location, start MH and second MH)
D. PIPE DEFLECTION MEASUREMENT:
1. In accordance with ASTM D3034, no less than 30 days after completion of the PVC sewer
pipe installation, the Contractor shall test the pipeline for deflection using a "go/no-go"
deflection mandrel having a minimum of nine evenly spaced arms or prongs. The
"go/no-go" gauge shall be hand pulled through all sections of the pipeline by the
Contractor. The Contractor shall submit drawings of the "go/no-go" gauge to the Engineer
2019 Sewer Replacement Project Polyvinyl Chloride Gravity Pipe and Fittings
Nashua, NH 02085-4
