Appendix B - Water and Sewer Service Line Construction Specifications

CONSTRUCTION SPECIFICATIONS
EFFECTIVE: JUNE 28, 2012

1.0 GENERAL

1.1 Purpose

These Water and Wastewater Service Construction Specifications are intended to insure that the Services extended from the Water System and Wastewater System are constructed so as to not adversely impact the Water System or Wastewater System.

1.2 Authorization to Connect

This Appendix provides construction specifications, including testing and inspection requirements related to Services, but does not include all of the requirements for Connection to the Water or Wastewater Systems. Customers intending to make a Connection must contact the District prior to any construction or work on the Water Service or Wastewater Service so that all requirements for Connection can be determined. A complete description of the requirements for Connection can be found in these Rules and Regulations. Refer to Article IV, Authorization to Connect to Water System or Wastewater Systems.

Customers must submit a completed New Account Application and a Water and Wastewater Service construction plan to the District prior to any work to construct the Services.

1.3 Services and Meters

Each Water Meter shall have a separate and independent Water Service Connection to the Water Main.

1.4 Scheduling Inspections

The Customer shall notify the District when the Water or Wastewater Service is ready for inspection or Connection to the Water or Wastewater Main. Appointments for inspections, testing, Connection, meter inspection, Turn-On, Turn-Off or operation of Water Main valves must be scheduled with the District a minimum of two (2) business days in advance.

2.0 WASTEWATER SERVICES

2.1 Separation of Services

At least ten (10) feet of horizontal separation must be maintained between parallel Water and Wastewater Services. At locations where Water and Wastewater Services cross, the Water Service shall be located at least eighteen (18) inches above the Wastewater Service.

Approval must be granted by the District for a Wastewater Service to cross under or over a Water Main.

2.2 Pipe Material and Depth of Bury

The Wastewater Service piping shall be four (4) inch or greater in diameter SDR 35 Sewer Service PVC pipe with gasketed joints. If at least ten (10) feet of horizontal separation cannot be maintained between parallel Water and Wastewater Services the Wastewater Service must be constructed of C900 PVC pipe with integral bell and spigot joints or, SDR 21 Certa-Lok Yelomine PVC pipe with gasketed joints. District authorization must be obtained to install Water and Wastewater Services with less than ten (10) feet of horizontal separation. Wastewater Services shall be installed at a constant grade of not less than one quarter (¼) inch per foot, with a minimum of bends and no glue joints. Clean Outs should be installed every 100 feet and a maximum of three (3) feet from the face of the building. Wastewater Service piping shall be buried a minimum of five (5) feet below the ground surface. A depth of bury greater than fifteen (15) feet requires the approval of the District.

2.3 Underground Warning Tape

Underground Warning Tape shall be installed two (2) feet above all buried portions of the Wastewater Service. The tape shall meet the following requirements:
• Four (4) mil thick Polyethylene tape
• Solid green color with black lettering
• Six (6) inches in width.

2.4 Bedding Material

Bedding material shall consist of uniformly graded granular material, 3/8-inch or ¾-inch minus screened rock material, installed six (6) inches below and twelve (12) inches above the Service pipe.

2.5 Service Connection to Main

The connection of the Wastewater Service to the Wastewater Main shall be made as follows:

2.5.1 If the Service pipe is four (4) inches or six (6) inches in diameter, a saddle connection is required. The saddle connection shall be located no closer than ten (10) feet from a manhole. The flow line of the Service pipe shall enter the Main above the spring line of the Main. Connections into manholes are prohibited. All Connections up to six (6) inches in diameter shall be made by District personnel.

2.5.2 If the Service pipe is eight (8) inches or greater in diameter, the connection shall be made into an existing manhole or into a new manhole placed on the existing Main. Connections eight (8) inches or greater in diameter shall be made by a qualified contractor on behalf of the Customer and witnessed and inspected by a District Inspector.

2.6 Stub Outs

If a Stub Out pre-exists on a property and will not be used by the Customer, the Customer must cap the Stub Out and shall not bury it prior to inspection by the District. The use of a Stub Out for Connection to the Wastewater Main must be approved by the District.

2.7 Connections, Testing and Requirements for Inspection

No Services shall be covered with bedding material or backfill without the District Inspector’s approval. All portions of the Wastewater Service must be visible to the District Inspector for an inspection to be completed.

2.8 Repair Couplings

Repair Couplings on a wastewater service line must be compatible with the Sewer Service pipe, installed per the manufacture's specifications and inspected by District personnel.

2.9 Floor Drains

Floor drains in industrial areas and garage drains shall not be connected to the Wastewater System without written permission from the District.

3.0 WATER SERVICES

3.1 Materials

3.1.1 Copper Tubing

Copper Water Services shall be 1", 1.5" or 2" diameter Type K copper tubing, ASTM B88. All joints shall be brass compression couplings or silver solder. No lead solder joints shall be allowed. All copper service lines must use full lengths of tubing (i.e. 100' for 1", 60' for 1.5" and 40' for 2") before a splice can be installed.

Installed Type K copper tubing shall be free of kinks, indentations, and damaged areas. Any damaged copper tubing or fittings may be rejected by the District Inspector.

An appropriate size gooseneck shall be made in the Water Service at the corporation valve to prevent the Service from being pulled from the Water Main during backfill and compaction operations.

3.1.2 Polyethylene tubing (PE)

Polyethylene tubing used for water services only shall meet the requirements of AWWA C901, shall be 3408 high density resin material, copper tubing size (CTS) and conform to ASTM D2737. All joints shall be brass compression grip ring type with stainless steel inserts. Special attention should be given to properly securing the connection to the piping within the structure. It is recommended that the connection of HDPE to copper within the structure be mechanically restrained. Polyethylene tubing shall be SDR9 with a pressure rating of 200 psi. All polyethylene service lines must use full lengths of tubing (i.e. 300' for 1", 250' for 1.5" and 200' for 2") before a splice can be installed.

A tracer wire, 10-gauge, shall be taped to the Water Service at every two (2) feet from the corporation valve to the inside of the structure, that is brought up to the surface at the Curb Stop valve. Refer to Detail provided by the District. Wire connections shall be wax taped for corrosion protection.

Polyethylene tubing shall not be used for water services where the static water pressure at the Curb Stop valve is 170 psi or greater.

All Water Services between the corporation valve and the Curb Stop valve shall be constructed of Type K copper.

An appropriate size gooseneck shall be made in the Water Service at the corporation valve to prevent the Service from being pulled from the Water Main during backfill and compaction operations.

3.1.3 Ductile Iron Pipe (DIP)

Water services greater than two (2) inches in diameter shall be at least four (4) inches in diameter and be constructed of ductile iron pipe, Class 52, with a pressure rating of 350 psi. Services to be constructed of ductile iron pipe must be designed by a licensed engineer and construction plans must be submitted to the District for approval.

A tracer wire, 10-gauge, shall be taped to the Water Service at every two (2) feet from the corporation valve to the inside of the structure, that is brought up to the surface at the Curb Stop valve. Wire connections shall be wax taped for corrosion protection.

3.2 Bedding Material and Burial Depth

Bedding material shall consist of uniformly graded granular material, 3/8-inch or ¾-inch minus screened rock material, installed six (6) inches below and twelve (12) inches above the Service pipe. Water Services shall be buried a minimum of seven (7) feet and a maximum of nine and a half (9.5) feet below the ground surface.

3.3 Underground Warning Tape

Underground warning tape shall be installed two (2) feet above all buried portions of the Water Service. The tape shall meet the following requirements:
• Four (4) mil thick Polyethylene tape
• Solid blue color with black lettering
• Six (6) inches in width.

3.4 Fire System Service

Separate Water Services for fire suppression systems are prohibited, unless required by the local fire authority. Connection of the fire suppression system to the Water Service shall occur downstream from the Curb Stop valve and upstream of the meter. Refer to Detail provided by the District. The same orientation may occur within a meter pit, meter vault, or within the mechanical room of a building.

3.5 Service Separation

A horizontal separation of ten (10) feet must be maintained between parallel Water and Wastewater Services. At locations where Water and Wastewater Services cross, the Water Service shall be located eighteen (18) inches above the Wastewater Service.

Approval must be granted by the District for a Water Service to cross under or over a Water or Wastewater Main.

3.6 Service Alignment

The alignment of the Water Service shall take the shortest, most direct route from the Water Main to the Water Meter.

3.7 Curb Stop

The Curb Stop shall be located a maximum of one (1) foot within the property line or edge of easement, and shall be easily accessible to District personnel. The Curb Stop valve box must be a Mueller brand, curb box extension type with arch patterned base and stationary rod, accessible at the ground surface. Dry ice, or other approved plumbing method, shall be used when making repairs to a Curb Stop. Curb Stops shall be located at the Main when the Water Service material is ductile iron pipe (DIP).

3.8 Stub Out

When Water Service Stub Outs are installed in conjunction with the installation of the Water Main, the stub out shall be valved off and plugged, water tight, with a valve box, the top of which is installed at the ground surface, and located by a surveyor. A copy of the lot plan showing the Stub Out locations shall be provided to the District for inspection and location verification. Electronic survey points shall be provided to the District in a format compatible with the District’s GIS mapping system. Stub Outs shall not be buried prior to inspection by the District. The use of a Stub Out for Connection to the Water Main must be approved by the District.

3.9 Connections, Testing and Requirements for Inspection

All Water Service connections of 1", 1.5" and 2 inch diameter shall be made only by District personnel using a tapping saddle fitting. All larger Water Service Connections shall be made by a qualified contractor on behalf of the Customer, and witnessed and inspected by a District Inspector. For all connections 4" and larger in diameter a tee shall be installed in the Water Main.

No Services shall be covered with bedding material or backfill without the District Inspector’s approval. All portions of the Water Service must be visible to the District Inspector for an inspection to be completed.

After backfilling, for ductile iron pipe only, the District Inspector will perform high chlorine, low chlorine and bacteriologic testing on the Service. Twenty four (24) hours is required by the District to complete these tests. Failure to pass these tests will result in the requirement that the Customer flush the Service before the District retests the Service.

All Water Services shall be pressure tested at a minimum of 250 psi for two (2) hours. Pressure tests must be witnessed and approved by a District Inspector.

District personnel must attend all underground Fire Protection Service flush tests in order to operate Curb Stop valves.

Customers requesting Connections after November 15 and before April 15 must provide heating, adequate to prevent freezing of water, in the Connecting area.

3.10 Pressure Reducing Valve (Residence)

A pressure-reducing valve (PRV) shall be installed on all Water Services upstream of the water meter, ensuring that the water meter and the building plumbing system are protected from fluctuating water main pressures. The pressure setting of the PRV shall not exceed 100 psi without written permission from the District.

3.11 Pressure Reducing Valve (Fire Suppression System)

A pressure-reducing valve (PRV) shall be installed on all fire sprinkler systems to ensure that they are protected from fluctuating water main pressures. The pressure setting of the PRV shall not exceed 200 psi without written permission from the District.

3.12 Shutoff Valves

A shut-off valve shall be installed upstream of the PRV. Additionally, a shut-off valve shall be installed downstream of the water meter to facilitate repairs.

3.13 Backflow Prevention Devices

Backflow prevention devices are required on all Water Services where specified by the local plumbing official or the Colorado Department of Health. Refer to Article VII of these Rules and Regulations for Backflow Prevention regulations.

3.14 Water Meter and Meter Assembly

All Connections to the District's Water System shall include a Water Meter. The meter type and size shall be determined by the District. The meter assembly shall conform to the Approved Meter Assembly Diagram, provided by the District. The District will provide the Customer with a meter once the Customer has paid the appropriate meter fee. The Customer shall install the meter per the specifications below.

The location of the meter is subject to District approval. The meter location shall be adequately insulated to protect from freezing, fully accessible, adequately ventilated, well-lit, and shall not meet the definition of confined space, as defined by the Occupational Safety and Health Administration (OSHA), unless approved by the District. The design of meter pits must be approved by the District.

The District shall inspect the installation of all water meters. The Customer will be provided with a three-strand wire for installation of a transmitter. Prior to meter inspection and water Turn-On, the Customer shall install the meter assembly and the wire from the meter location to an appropriate transmitter installation site. The transmitter will be located five (5) feet above ground in an accessible location free from snow that will provide year-round access for District personnel. The maximum distance from the meter to the transmitter shall not exceed one hundred (100) feet without approval of the District. Meters shall be installed in a horizontal position. The Meter shall be no higher than three (3) feet above and no lower than six (6) inches above the floor, as measured from the bottom of the Meter.

The Customer is responsible for protecting the Meter from freezing or other physical damage during construction. After completion of the construction and acceptance by the District, the Customer is responsible for protecting the meter from freezing, damage due to high water pressure (with a working PRV), and other physical damage.

Water will remain turned off until the District accepts payment of Connection fees.

3.15 Bypass Piping on Commercial Meters

All water meters greater than 1.5 inch in size and serving six (6) or more Residential Units, mixed commercial/residential developments, or a commercial development shall be installed with a bypass line equipped with isolation valves to allow for maintenance of the meter without interruption of water service to the Customer. The bypass line will be unmetered and secured with a District padlock. Refer to detail provided by the District for bypass configuration.

3.16 Stop and Waste Valves

Stop and waste valves are not allowed.

3.17 Meter Pits

Meter pits shall be adequately sized to contain the meter assembly and allow maintenance of the assembly. Meter pits shall be installed at the property line or the edge of easement, and downstream of the Curb Stop valve.

3.17.1 Meters 1": Mueller/Hunt Thermal Coil Meter Boxes, 18" diameter are recommended for 1- inch meter applications.

3.17.2 Meters 1.5" or Larger: Will be required to be installed in a precast concrete manhole meter pit with an overall depth of 84 inches, conforming to ASTM C478.

3.17.3 Manhole Bases: Precast concrete, ASTM C478, 48-inch diameter or District approved alternative.

3.17.4 Manhole Sections: ASTM C478. Precast concrete with the lip outside, low end down, 48-inch diameter or District approved alternative. Concrete cones shall be eccentric.

3.17.5 Manhole Rings and Covers: For installations located in public rights of way cast iron, ASTM A48 with a flat lid with the lettering “WATER” cast on the cover. Ring and cover combined weight shall be greater than 255 pounds and machined to fit securely with a non-rocking cover. Lid shall be waffle patterned, hot dipped in asphalt, and able to withstand HS 20 traffic loading.

3.17.6 Manhole Steps: For concrete manholes only, non skid steps shall be installed capable of carrying a load of 1,000 pounds, installed six (6) inches from face of the manhole. The steps shall conform to ASTM C478 and be plastic coated.

3.17.7 Manhole Joint Sealant: Double RUBR-NEK LTM butyl rubber flexible gasket-type sealant shall be applied to all manhole joints with RUB'R-NEK primer. One (1) inch on 48 inch diameter manholes; 1.5 inch on all larger sizes.

3.18 Repair Couplings

Repairs to Water Services located between the corporation stop and the curb stop that require couplings shall be made only by the use of a silver-soldered joint and shall be inspected and approved by the District prior to water Turn On.