Underground water piping distribution system shall be designed in conformance with the most current edition of the City of Fairborn construction and material specifications, except as noted in this section.
Piping 3”-size and smaller shall be Type K copper, ASTM B88, with silver brazed joints. Joints shall be held to a minimum.
Piping 4”-size and larger shall be genuine ductile iron conforming to ANSI/AWWA C151/A21.51, Class 53. Fittings shall be 250 lb. pattern ductile iron, ANSI/AWWA C110/A21.10 or ANSI/AWWA C153/A21.53. Pipe and fittings shall be bitumastic cement lined, ANSI/AWWA C104/A21.4. Pipe and fitting connections shall be mechanical joint or “push-on” compression type joint with rubber ring gasket, ANSI/AWWA C111/A21.11.
Piping 4” and larger may, at the contractors’ option, be PVC (polyvinyl chloride) pressure pipe with bell and spigot joints utilizing a double seal locked in gasket. Class 305, DR14, meeting AWWA C900 and NSF 61.
Valves, fittings and Joints shall be restrained with wedge-action, self-actuating mechanical joint restraint fittings, concrete trust blocks, or a combination restrained joints and thrust blocking.
331119 Fire Suppression Utility Water Distribution Piping
See 33 11 16.
331216 Water Utility Distribution Valves
Underground service valves 2”-size and smaller shall be UNS/CDA No. C89833 alloy construction, AWWA C800 (ASTM B-62 and ASTM B-584), approved to ANSI/NSF Standard 61, Annex G (372), non-directional and is watertight with flow in either direction, 300 PSI working pressure.
Underground service valves 4”-size and larger shall be resilient seat gate type, AWWA Standard C-509, non-rising stem, with cast iron body, bonnet and wedge, 175 lb. working pressure, coated interior and exterior with fusion bonded epoxy (AWWA C550 and NSF 61 ), opening by turning left. Right hand opening valves are expressly forbidden.
Valves shall have a square or tee head for wrench operation. Valve rotation, direction and size of head shall conform to Water Department and responding Fire Department standards.
A three-piece cast iron screw type valve box with cover marked with the valve number (provided by University) shall be provided with each underground valve. Valve box shall be installed with top raised 8” above finished grade, with 1 cubic foot of concrete formed round and poured around curb box.
Post indicator valves shall include a free standing vertical indicator with adjustable two-piece stem housing section, glassed-in position indicator, removable wrench and locking device, finished bright red.
331219 Water Utility Distribution Fire Hydrants
Fire hydrants shall conform to AWWA C502, with nozzles and threads conforming to Fairborn Fire Department standards UL listed and FM approved, traffic model breakaway type . Each nozzle shall have a chain-secured threaded brass cap. Furnish a hydrant wrench for each hydrant. Basis of design is American Flow Control, “American-Darling”.
Fire hydrants shall be installed with a service valve and valve box. Pipe and fitting at the base of the hydrant shall be mechanical joint anchoring type so as to not require a concrete thrust block.
The “drain-to-ground” opening in the fire hydrant barrel shall be plugged to prevent entrance of ground water.
331300 Disinfecting of Water Utility Distribution
Thoroughly flush the system prior to disinfection. Disinfection shall be performed by qualified personnel in accordance with the Local Authorities prescribed method, or when a Local Authority prescribed method is not available, in accordance with AWWA C651 Standards. Disinfection shall be by means of a chlorine solution injected into the water system. Each outlet shall be tested to prove presence of minimum chlorine concentration. Document that adequate levels of chlorine are present in each pipe section. Following the appropriate retention period, flush out the system with clean water until the residual free chlorine content is equal to the level approved by the Health Department.
Perform a bacteriological analysis of the water system. Provide certification stating the name of the lab performing the testing, the job name, the date of the sample and results of the testing. Copies of the lab reports shall be given to the University.
333313 Utility Area Drains
Materials: Catch basin lids and frames shall be cast iron construction, heavy duty, with removable lid.
Trench and inlet grating, catch basins and curb inlets shall be Americans with Disabilities Act (ADA) compliant and bicycle safe.
Trench and inlet grating, catch basins and curb inlets shall be selected and designed with attention to how the Americans with Disabilities Act (ADA), vehicle loading, pedestrian traffic and bicycle traffic affect the placement of products. The ADA, as it relates to grating, requires that grates in walking surfaces have slot openings 0.5” or less in one direction. Grates with elongated opening shall be placed with long dimension perpendicular to the dominant direction of travel.
The above considerations shall not affect the ability of a grate to intercept storm water or its hydraulic efficiency.
335113 Natural Gas Piping
Underground steel pipe shall be Schedule 40, A120/A53, ASTM A-120, Type F, or ASTM A-53, Type F for 4”-size and smaller. For 5”-size and larger,, ASTM A53, Type E, Grade B, Schedule 40. All pipe shall be black steel with factory applied plastic coating. Joints shall be welded and wrapped with asphaltum type tape. Provide isolation fittings and cathodic protection for each underground piping system.
Cathodic protection shall include minimum of 2 test station, maximum 300 feet apart, in plastic curb box and grade.
Plastic Pipe shall be high density heavy wall plastic piping with two No. 12 TW single strand, single conductor, copper tracer and lead wires together with plastic curb boxes and terminal blocks. Joints and fittings shall be fusion welded.
Above ground piping shall be Schedule 40, A120/A53, ASTM A-120, Type F, or ASTM A53, Type F, Grade B black steel pipe. Joints in 1-1/2 inch and smaller pipe may be screwed. Fittings, class 150 lb. banded, malleable iron, black. Use of bushings is prohibited. Weld joints in pipe 2 inch and larger.
Underground valves shall be plastic ball valve, 125 psi, molded polyethylene body with butt or socket fusion ends and square operating head, or lubricated plug valve, Iron body, 200 psi, threaded or flanged ends, lubrication fitting shall be designed and placed for easy access thru the valve box.
Valve box to grade with wrench extension and cover marked “GAS” shall be provided with each underground valve. Valve box shall be installed with top raised 8” above finished grade, with 1 cubic foot of concrete formed square and poured around curb box.
Above ground valves shall be lubricated plug type, ball type, consistent with service size and listing. All above grade valves shall include a locking feature.
Qualification Program: Any contractor performing natural gas installation, modification or repair work on the WSU campus must be qualified to work on natural gas piping and show proof of such qualification before performing any work. Qualifications shall be in accordance with all current rules and regulations outlined in 49 CFR 192.
335133 Natural Gas Metering
Gas supply to buildings shall be metered for new buildings and major additions and renovations. Meters shall be temperature and pressure compensated when installed upstream of the building pressure regulator and subject to varying supply pressure. Pressure compensating devices shall maintain meter accuracy.
Meters shall conform to the requirements and policies of the utility system providing the gas and AGA. Meter shall be located outside of the building. Meter installations inside the building shall not be permitted unless specifically pre-approved by the University. Venting pipes shall be vented to the outside of the building.
Remote registers shall be provided when the meter location prevents direct reading of the meter register from a standing position on grade or finished floor. Remote registers shall be installed at 4’ to 5’ above grade or finished floor. Remote registers shall be compatible with the installed meter, shall be from the same manufacturer, and shall have a straight reading odometer type display.
Meter shall provide one set of dry contacts that give a pulse output for every 10 cubic feet of usage recorded by the meter. No batter powered registers, including remote registers, are permitted.
Easy access shall be provided to meters for maintenance, repairs, and meters shall be flanged and valved to permit convenient replacement of metering.
