Enclaves-LR 950512...~tility & Environmental Services, lr~..
LOW PRESSURE AIR TEST FOR GRAVITY SANITARY SEWER
F, ach section of sewer shall bc tested between successive manholes.
Air shall be introduced inlo the pipeline until 4.(! psi gauge pressure has been reached. At that time the flow of air shall b~ ·
rmlucgd and thc internal air pressure sh',dl be maintained between 3.5 and 4.5 psi gauge for at Least two (2) minutea to allow
ti~ air temperature to come to equilibrium with the temperature of the pipe w',dls. Pressure in the pipe shall be coaataatly
moako~cd by a gauge and hose arrangement separate from thc hose used to introduce air into the line. PI'~SSUI'~ ill tli~
ldl~ ~ not be allowed to exceed 5 psi.
bdtct tbe temperature 'has stabilized and no air leaks at thc plugs have been found, the air pressure shall be used to
d~tm'min~- ~ time lapse required for the air pressure to drop to 2.5 psi gauge.
If tbe time lapac required for the air pressure to decrease form 3.5 to 2.5 psi exceeds that shown in the following table,,
pi~ shall be presumed to be wi[hln acceptable limits for leakage.
If flag time lapsed ia leas than that shown ia the table, the contractor shall make corrections to reduce the leakage to
Line Information Test Results Air Test Mandrel
Line Station to Station I Pi~e Size LF. Tested Time Passed? Passed?
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