#2075 - Essential Operations for a Reliable Water Dist System IEPA#5083 WEBINAR
#2075 Essential Operations for a Reliable Water Distribution System IEPA#5083
Delivered on: 05/04/12
RTC Hour: 1.00 Total Hours: 1.00
Presented By: Owen Keenan, M.E. Simpson, Co., Inc.
economy, water utilities must improve accountability by maintaining
water system performance and extend the useful life of their
distribution system. Water utilities must know what their water losses
are in order to budget, plan, and correct deficiencies in their
The first step that a water utility
should take to determine their water losses both apparent and real is to
test the accuracy of their master meters. Once a water utility knows
what is being delivered into their distribution system, meter records
from their customers should be totaled and compared. As stated in AWWA’s
M6 manual, "Typically, the largest 10 percent of the meters measure 40
to 60 percent of a system’s consumption.” This difference is the water
utility’s totalized apparent and real losses. Apparent losses can be
determined by testing. Meters that are suspected to be inaccurate should
be tested over a range of flows in accordance to AWWA standards. It is
clear that this represents loss revenue to the water utility and
justifies the next essential operation to be taken.
data obtained from meter testing and other meter records, a leak survey
should be done to determine leakage (real losses) using state of the
art leak listening devices and leak correlation equipment as needed. A
leak detection survey will conserve a precious resource, lower
production costs for the water utility and lower the utility’s real
losses. Once the leaks have been located and prioritized, repairs can be
scheduled after the next essential operation is done.
can leaks be repaired if the shutdown cannot be done? The importance of
the proper operation of valves in a water utility’s distribution system
for regular and emergency operation can’t be overstated. Are the valves
accessible? Are the valves exercised on a regular basis? How would you
like to have to tell a hospital, a school, or a senior residence center
that they will be without water for an undetermined period because a
valve shutdown had to be extended?
When all valves in the distribution system have been properly exercised, the next essential operation can be performed.
Fire Hydrant Maintenance:
importance of hydrant maintenance is obvious. LIVES are saved by a
water utility providing the required fire protection when an emergency
arises. The proper operation and maintenance of EVERY hydrant in a water
utility’s system is ESSENTIAL. There are other significant benefits to
be gained by regular hydrant maintenance. ISO ratings are weighted
heavily towards the water system and its fire hydrant operability.
Hydrant Maintenance is a pro-active project that creates a healthy water
system. Hydrants that do not drain properly in cold weather climates
can freeze and become inoperable.
COST: Illinois Section AWWA Members: FREE; Nonmembers: $25.00
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