N.Y.C. Admin. Code § EBC 310: Section EBC 310: Plumbing

310.1 General.

In addition to the general requirements of Section 302.9, alterations, additions or repairs of installations of plumbing systems shall conform to the requirements for new installations without requiring the existing installation to comply with all of the requirements of the New York City Plumbing Code, this section, and the applicable provisions of Chapters 8, 9, 10, and 11 of this code. Alterations, additions, or repairs shall not cause an existing installation to become unsafe, hazardous, or overloaded.

310.2 Plumbing fixtures.

The number of existing plumbing fixtures shall be increased where the alteration work results in an occupant load increase greater than 10 percent, when calculated in accordance with Chapter 10 of the New York City Building Code, and Section 403 of the New York City Plumbing Code requires the additional installation of more than 1 plumbing fixture.

310.3 Existing piping used for grounding.

Existing metallic water service piping used for electrical grounding shall not be replaced with nonmetallic pipe or tubing until other approved means of grounding is provided.

310.4 Rehabilitation of piping systems.

Cured in Place pipe (CIPP) and epoxy spray pipe lining systems shall not be used.

310.5 Reuse of piping.

Piping that has been utilized for any purpose other than conveying potable water shall not be utilized for conveying potable water.

310.6 Abandonment of existing building sewer connections.

All abandoned building sewers shall require plug permits from the Department of Environmental Protection and shall be securely sealed at a point inside the curb line and as close thereto as practicable.

310.7 Sanitary drainage.

Where an alteration or addition made to an existing building affects the sanitary drainage system, such work shall comply with the requirements of the Department of Environmental Protection, Chapter 7 of the New York City Plumbing Code and rules of the Department.

310.7.1 Individual private on-site sewage disposal system.

Installation, alteration, and maintenance of individual private on-site sewage disposal systems serving one- and two- family dwellings and nonresidential properties receiving less than 1,000 gallons of sewage per day shall be subject to New York City Plumbing Code and rules of the Department.

310.7.1.1 Expansion of existing septic systems.

Where an alteration is proposed that will result in an increase in the number of bedrooms in one- and two-family dwellings or the daily flow rate in all other properties, thereby increasing the load on the existing septic system, such alteration shall comply with rules of the Department.

310.7.1.2 Where public sewers are made available to premises with private sewage disposal system.

When public sewers are made available to premises with individual on- site private disposal systems, such private sewage disposal system shall be abandoned in a manner prescribed by the commissioner, and the owner shall connect the building house sewer to the available public sewer within 6 months of the date of notification that the sewer has been accepted to receive flow by the agency or agencies having jurisdiction.

310.8 Storm drainage.

Alterations of buildings proposing horizontal building enlargement or alterations that increase impervious surfaces on the tax lot shall comply with the applicable provisions of Chapter 11 the New York City Plumbing Code and the requirements of the Department of Environmental Protection.

310.8.1 Increases in existing impervious surfaces.

Whenever impervious surfaces on the lot are increased, such impervious surfaces shall drain into a storm sewer system, or a combined sewer system, or to an approved place of disposal in accordance with the New York City Plumbing Code and Section 106 of this code.

310.8.2 Private on-site stormwater disposal.

Installation of private on-site stormwater disposal shall comply with Section 1114 of the New York City Plumbing Code.

310.9 Secondary (emergency) roof drains.

Existing secondary (emergency) means of overflow shall not be removed or reduced in capacity. Where alterations are being made to existing roofs with existing storm drainage, the addition of secondary (emergency) drainage shall not be required where:

1. The alterations do not result in the addition of new perimeter construction where no such parapet or similar construction previously existed which extends above the roof in such a manner that water will be entrapped if the existing drains allow buildup for any reason;

2. The alterations do not increase the impervious area of the roof; or

3. The additional impervious area does not result in exceeding the existing flow of the storm drainage system, or portion thereof, when sized in accordance with Section 1106 of the New York City Plumbing Code.