N.Y.C. Admin. Code § PC 1302: Section PC 1302: On-Site Nonpotable Water Reuse Systems

1302.1 General.

The provisions of Section

1302

shall govern the construction, installation, alteration and repair of on-site nonpotable water reuse systems for the collection, storage, treatment conveyance and application of on-site sources of nonpotable water as permitted by the

New York City Construction Codes

, and all applicable laws, and rules, including but not limited to those of the Department of Environmental Protection and the Department of Health and Mental Hygiene.

1302.2 Sources.

On-site nonpotable water reuse systems shall be permitted to collect waste discharge from only the allowed sources as established by the Department of Health and Mental Hygiene.

1302.3 Traps.

Traps serving fixtures and devices discharging waste water to on-site nonpotable water reuse systems shall comply with Section 1002.4.

1302.4 Collection pipe.

On-site nonpotable water reuse systems shall utilize drainage piping approved for use in plumbing drainage systems to collect and convey untreated water for reuse. Vent piping approved

for use in plumbing venting systems shall be utilized for vents in the nonpotable system. Collection and vent piping materials shall comply with Section

702

,

Table 702.1

and

Table 702.2

.

1302.4.1 Installation.

Collection piping conveying untreated water for reuse shall be installed in accordance with Section

704

.

1302.4.2 Joints.

Collection piping conveying untreated water for reuse shall utilize joints approved

for use with the conveyance piping and appropriate for the intended applications as specified in Section

705

.

1302.4.3 Size.

Collection piping conveying untreated water for reuse shall be sized in accordance with drainage sizing requirements specified in Section

710

.

1302.4.4 Labeling and marking.

Additional marking of collection piping containing untreated water for reuse shall be identified in accordance with Section 704.7.

1302.5 Filtration.

Untreated water collected for reuse shall be filtered as required for the intended nonpotable end use as established by the Department of Health and Mental Hygiene. Filters shall be accessible for inspection and maintenance. Filters shall utilize a pressure gauge or other approved method to provide indication when a filter requires servicing or replacement. Filters shall be installed with shutoff valves immediately upstream and downstream to allow for isolation during maintenance.

1302.5.1 Filtration required.

Nonpotable water utilized for water closet and urinal flushing applications shall be filtered by a 100-micron or finer filter.

1302.6 Disinfection and treatment.

Untreated water collected for reuse shall be disinfected and treated as required for the intended nonpotable end use as established by the Department of Health and Mental Hygiene.

1302.7 Storage tanks.

Storage tanks utilized in on-site nonpotable water reuse systems shall comply with Sections 1301.9 and 1302.7.1 through 1302.7.4.

1302.7.1 Location.

Storage tanks shall be located with a minimum horizontal distance between various elements as indicated in

Table 1302.7.1

.

Table 1302.7.1 Location of Nonpotable Water Reuse Storage Tanks

Element

Minimum Horizontal Distance from Storage Tank (feet)

Critical root zone (CRZ) of protected trees

2

Lot line adjoining private lots

5

Seepage pits

5

Septic tanks

5

Water wells

50

Streams and lakes

50

Water service

5

Public water main

10

For SI: 1 foot = 304.8 mm.

1302.7.2 Design and construction.

Storage tanks shall be designed and constructed in accordance with

Chapters 16

through

22

of the

New York City Building Code

and in accordance with the following standards, as appropriate for the material of the storage tank: AWWA D100, AWWA D115, AWWA D120, UL 58, UL 1746, UL 1316, UL 142, API 12F or API 12D.

1302.7.3 Inlets.

Storage tank inlets shall be designed to introduce collected water into the tank with minimum turbulence, and shall be located and designed to avoid agitating the contents of the storage tank.

1302.7.4 Outlets.

Outlets shall be located not less than 4 inches (102 mm) above the bottom of the storage tank and shall not skim water from the surface.

1302.8 Valves.

Valves shall be provided in accordance with Sections 1302.8.1 through 1302.8.3.

1302.8.1 Collection piping bypass valve.

One full-size three-way diverter valve shall be installed on collection piping upstream of each storage tank, or drainfield, as applicable, to divert untreated on-site reuse sources to the sanitary sewer

to allow servicing and inspection of the system. Bypass valves shall be installed downstream of fixture traps and vent connections. Bypass valves shall be marked to indicate the direction of flow, connection and storage tank or drainfield connection. Bypass valves shall be installed in accessible locations. Two shutoff valves shall not be installed to serve as a bypass valve.

1302.8.2 Backwater valve.

One or more backwater valves shall be installed on each overflow and tank drain pipe. Backwater valves shall be in accordance with Section

715

.

1302.8.3 Conveyance piping bypass valve.

One full-size three-way diverter valve shall be installed on the conveyance piping system upstream and downstream of all treated storage tanks, as applicable, to divert treated on-site nonpotable reuse water to the sanitary sewer to allow system testing, commissioning and bypass conditions.

1302.9 Pumping and control system.

Mechanical equipment including pumps, valves and filters shall be easily accessible and removable in order to perform repair, maintenance and cleaning. The minimum flow rate and flow pressure delivered by the pumping system shall be appropriate for the application and in accordance with Section

604

.

1302.10 Water pressure-reducing valve or regulator.

Where the water pressure supplied by the pumping system exceeds 85 psi (587 kPa) static, a pressure-reducing valve shall be installed to reduce the pressure in the nonpotable water conveyance system piping to 85 psi (587 kPa) static or less. Pressure-reducing valves shall be specified and installed in accordance with Section 604.8.

1302.11 Conveyance pipe.

Conveyance piping utilized in on-site nonpotable water reuse systems shall comply with Sections 1302.11.1 through 1302.11.3.

Exception:

Irrigation piping located outside of the building and downstream of a backflow preventer.

1302.11.1 Materials, joints and connections.

Conveyance piping shall conform to the standards and requirements specified in Section 1301.6.

1302.11.2 Design.

On-site nonpotable water reuse conveyance piping systems shall be designed and sized in accordance with Section

604

for the intended application.

1302.11.3 Marking.

On-site nonpotable water conveyance piping labeling and marking shall comply with Section 1301.6.

1302.12 Tests and inspections.

Tests and inspections shall be performed in accordance with Sections

108

,

312

, and Sections 1302.12.1 through 1302.12.7. Special inspections of the nonpotable water systems shall be conducted in accordance with

Chapter 17

of the

New York City Building Code

.

1302.12.1 Collection pipe and vent test.

Drain, waste and vent piping used for on-site water reuse systems shall be tested in accordance with Section

312

.

1302.12.2 Storage tank test.

Storage tanks shall be tested in accordance with Section 1301.9.11.

1302.12.3 Water supply system test.

The testing of makeup water supply piping and conveyance piping shall be conducted in accordance with Section 312.5.

1302.12.4 Inspection and testing of backflow prevention assemblies.

The testing of backflow preventers and backwater valves shall be conducted in accordance with Section 312.10.

1302.12.5 Inspection of vermin and insect protection.

Inlets and vents to the system shall be inspected to verify that each is protected to prevent the entrance of insects and vermin into the storage tank and piping systems in accordance with Section 1301.7.

1302.12.6 Water quality test.

Water quality testing and monitoring shall be conducted in accordance with requirements of the Department of Health and Mental Hygiene.

1302.12.7 Inspection and testing of cross connection control.

Cross connection control inspection and testing shall be conducted in accordance with the requirements of the Department of Health and Mental Hygiene.

1302.13 Operation and maintenance manuals.

Operation and maintenance materials shall be supplied with nonpotable on-site water reuse systems in accordance with Sections 1302.13.1 through 1302.13.4 and in accordance with the requirements of the Department of Health and Mental Hygiene.

1302.13.1 Manual.

A detailed operations and maintenance manual shall be supplied in hardcopy form with all systems

.

1302.13.2 Schematics.

The manual shall include a detailed system schematic, and the locations and a list of all system components, including manufacturer and model number.

1302.13.3 Maintenance procedures.

The manual shall provide a schedule and procedures for all system components requiring periodic maintenance. Consumable parts, including filters, shall be noted along with part numbers.

1302.13.4 Operations procedures.

The manual shall include system startup and shutdown procedures. The manual shall include detailed operating procedures for the system.