EWD PROVISIONS FOR WATER DISTRIBUTION SYSTEMS
1.0 DISTRIBUTION SYSTEMS - GENERAL
Distribution systems shall be designed in accordance with these regulations and applicable requirements of Chapter 17.555 Florida Administrative Code, as amended.
1.1 Design Period
Except for parts of the system that can be readily increased in capacity, distribution systems shall be designed for
the estimated ultimate tributary population 20 years hence.
1.2 Design Factors
In determining the required capacities of the distribution system, the following factors shall be considered:
A. Maximum hourly demand
B. Additional demands for fire fighting
1.3 Design Basis
New distribution systems shall be designed on the basis of an average daily per capita water demand of
not less than 100 GPD when no water use information is available. In addition, non-domestic demands
must be quantified and added to the domestic demand.
As an alternate method, when the need for deviations from the foregoing per capita rates is demonstrated,
a brief description of the rationale and methodology used shall be submitted to EWD for consideration
and approval.
1.4 Design Standards
All distribution system elements shall, unless specifically modified herein, be in compliance with the
following manuals and standards:
1) Recommended Standards for Water Works, Great Lakes-Upper Mississippi River Board of
State Sanitary Engineers, as published by Health Education Service, P. O. Box 7283, Albany,
New York 12224 (latest edition), 2) American Water Works Association 1) Latest edition of
Standard AWWA C-600 Installation of Ductile Iron Mains and their Appurtenances. To be
used for ductile iron and C-900 plastic pipe. Pipe bedding to be Type 5 as shown on Figure 1 –
AWWA C-600.
2.0 DETAILS OF DESIGN AND CONSTRUCTION OF WATER MAINS
2.1 Size
Any distribution system shall not be less than four (4) inches in diameter. Any pipe 12 inches or larger
must be Ductile Iron.
2.2 Depth
Water mains shall have a minimum of 2.5 feet (30 inches) and not more than 3.0 feet (36 inches) of cover
under roadways and paved areas, and 2.5 feet (30 inches) to 3.0 feet (36 inches) of cover at final grade under
open areas, if more than 3.0 feet (36 inches) is required ductile iron pipe must be utilized.
2.3 Pipe Bedding and Trench Backfill
All mains shall be designed to prevent damage from superimposed loads. Proper allowance for loads to
the water mains shall be made due to the width and depth of trench.
Rigid & Flexible Pipe - Pipes shall be bedded in accordance with AWWA C-600 Pipe
bedding to be Type 5, as shown on AWWA C-600 Figure 1.
B. Trench Backfill
1. Backfill material- trench backfill material shall consist of any of the following: well graded
coarse granular materials with maximum particle size not exceeding 4 inches; sands, gritty
sands; or clayey sands. Solids having more than 35% of its weight passing a No. 222 sieve shall
not be used as backfill.
2. Backfill area shall be compacted to not less than 95% of maximum density as determined by
AASHTO T-99.
3. Density test as required by the District.
2.4 Pressure Test and Allowable Leakage
Pressure test shall be made in accordance with AWWA C-600 modified as follows:
Apply 150 psi pressure and maintain constant for two (2) hours. After two (2) hours measure amount of
water required to maintain test pressure.
Leakage shall be measured by the quantity of water pumped into the pipe to maintain test pressure during
test period. Maximum permissible leakage shall be less than the number of gallons per hour determined
by the formula within the EWD specifications.
Contractor shall perform all excavations to hydrostatically pressure test the tapping sleeve and gate valve
to 150 psi for a minimum of two (2) hours. EWD personnel must be present at all times during testing period. Contract Robin Sofa at rsofa@englewoodwater.com two working days prior to scheduled test date.
3.0 PROTECTION OF WATER SUPPLIES
There will be no physical connections between a public or private potable water supply system and a sewer, or appurtenance thereto, which would permit the passage of any wastewater or polluted water into the potable supply.
Sewers shall be laid at least 10 feet laterally, from any existing or proposed water main. Should local conditions prevent a lateral separation of 10 feet, a sewer main may be laid closer than 10 feet to a water main, if it is installed in a separate trench and if the elevation of the top (crown) of the sewer is at least 18 inches below the bottom (invert) of the water main.
4.0 TAPPING EWD EXISTING MAINS
EWD personnel will perform the tapping of the water main at Contractor's expense. The Contractor is responsible for the required coordination with EWD staff for the inspection and tapping of water mains. (two working days notice is required)
5.0 LOCATES
It is the responsibility of the Contractor to locate existing water mains and other utilities.
6.0 PERMITS
It is the responsibility of the Contractor to obtain all the necessary permits from County and State agencies to perform the work.
7.0 UTILITY PROPERTIES AND SERVICE
The Contractor shall be solely and directly responsible for any damage, injury, expense, loss, inconvenience, delay, suits, actions, or claims of any character brought because of any injuries or damage which may result from his construction operations.
8.0 SAFETY AND CONVENIENCE
The Contractor shall do all work necessary to protect the general public from hazards, including but not limited to, trenches or excavation in roadway. Barricades, lanterns, and proper signs shall be furnished in sufficient amount to safeguard the public.
9.0 MATERIAL SPECIFICATIONS
The following materials shall be utilized in the installation of water distribution systems.
a. Pipe
1. Ductile iron AWWA Class 350 meeting ANSI 21.51 specifications.
2. PVC bell and spigot pipe meeting AWWA C-900, DR 18 Class 150 specifications. Color -Blue
b. Fittings
1. Mechanical joint meeting AWWA C-110 and C-153, Class 350 specifications. 3" thru 24", Class 350 specifications.
c. Gate Valves
2" threaded R.S. Clow F-6103 -4" through 10" Mueller A-2360-20 or Clow F-6100, mechanical joint,
resilient seat meeting AWWA C-509 Class 200 specifications.
d. Air Release Valves
2" APCO Model No. 200
e. Valve Boxes
18" x 24" USF 7500 Russco 461-S or 461 A and 20" x 36" 562-S, two piece cast iron screw-type valve
box. Extensions to be cast iron.
f. Fire Hydrants (with nominal 5 1/4" main valve)
Mueller Centurion A-423, or Clow Medallion F-2545, meeting AWWA C-502 specifications.
Equipped with two (2) 2 1/2" hose nozzles and one (1) 5 1/4" pumper nozzle. (See Detailed Drawing
Attached)
g. Service Connection
Polyethylene pressure pipe, copper tubing size, meeting AWWA C-901-160 psi.
h. Service Saddle
2" thru 6" Mueller H-134, 8" thru 23" Mueller H-161. Double strap:
2" thru 6" Ford S-91, 8" and up Ford 202-B. Brass to be used on all taps.
i. Corporation Stop
2" Mueller B-20046, 3/4" or 1" Mueller H-15023, H-15028, or Ford F-1100 pack joint for CTS.
j. Meter Box
Single Ford gulf box - G 148-233 Double Ford gulf box - DG 148-243
k. Compression Union and Couplings
Mueller H-15403 or Ford C-44 series for CTS pipe.
l. Butterfly Valves
12" and above - Kennedy BFV 80 or Mueller B3211
m. Tapping Sleeves or D.I. Fittings
4" thru 12" Mueller H-615, 6" thru 12" 662-663 Clow Tyler or Rockwell (stainless steel). Main to be
hydrostatically tested prior to tapping -- 150 psi for 2 hours.
n. Tapping Valves
4" thru 12" Mueller H-687 and T-2360-16 or Clow F-5093 mechanical joint by flanged end. Resilient
seat meeting AWWA C-509 Class 200 specifications.
o. Ball Valves
2" Mueller B-20283 or Ford equal.
p. Cross Connection and Backflow Prevention Program
The purpose of the District’s Cross Connection Control and Backflow Prevention Program is to protect the District’s potable water distribution system from the possibility of contamination or pollution by containment of a potential contaminant or pollutant within the Customer’s Installation where it arose. The Customer’s Installation shall conform to all applicable rules including county and state building codes and Health Department requirements to eliminate the possibility of contamination or pollution of potable water within the Customer’s Installation. The District’s Cross Connection Control and Backflow Prevention Program shall comply with standards set forth by the Florida Department of Environmental Protection as provided within F.A.C. Chapter 62-555.360, Cross-Connection Control for Public Water Systems, F.A.C. Chapter 62-555.330(6), Guidance Documents for Public Water Systems which incorporates AWWA Manual M-14, and F.A.C. 62-610.450 which establishes public access reuse requirements as amended. Failure to comply with any provision of these Cross Connection and Backflow Prevention rules may result in immediate termination of service.
Cross Connection Controls
There shall be no connection of a potable private well, irrigation private well, reuse irrigation system, wastewater system or similar systems of any kind to the District’s potable water distribution system.
Backflow Prevention
Every potable-water Point of Delivery will incorporate a backflow prevention device or assembly appropriate for the degree of potential hazard (health/high hazard or non-health/low hazard). Selection of the appropriate backflow prevention device or assembly (using principles within AWWA Manual M-14) to be used at any Point of Delivery to best protect the District’s water distribution system shall be at the sole judgment of the District.
10.1 Upon completion of the project, the following items must be submitted to EWD prior to acceptance:
a. Certificate of Completion from Engineer of Record to include copies of the water line pressure
tests, and bacteriological analysis (void after sixty (60) days).
Six (6) sets Record Drawings of the completed PROJECT in a digital format between AutoCAD 14 and 2006 of the underground distribution lines detailing the following information:
Type of materials installed-mains, services. Also indicate all locations of change of material.
Indicate depth of cover over water mains at 100 feet intervals, as well as at major breaks in direction
As-built length of all jack and bore casings, and as-built distance from each casing to limit of
mechanical joint pipe.
Tie in distances from at least two (2) permanent structures to each valve, fitting, service line, blow-off point, hydrant, each end of jack and bore casing, etc.
Certified survey of the line with the valves only to be located from two (2) fixed structures.
As-built measurements of the service line main must be indicated along each segment of the installed pipe route, as well as as-built measurements from the centerline of the road to the main, must be indicated at least every 200 feet.
Bacteriological sample test points must be identified.