§727. Offsets in Drainage Piping in Buildings of Five Stories or More

A. Offsets of 45 Degrees or Less. An offset in a vertical stack, with a change of direction of 45° (0.785 rad) or less from the vertical, may be sized as a straight vertical stack. In case a horizontal branch connects to the stack within 2 ft (610 mm) above or below the offset, a relief vent shall be installed in accordance with §931.C of this code, except that when the offset stack is sized for a building drain (see Column 5 in Table 725.A.1 of this code) the relief vent may be omitted.

B. Above Highest Branch. An offset above the highest horizontal branch is an offset in the stack vent and shall be considered only as it affects the developed length of the vent.

C. Below Lowest Branch. In the case of an offset in a soil or waste stack below the lowest horizontal branch, no change in diameter of the stack because of the offset shall be required if it is made at an angle of not greater than 45° (0.785 rad) from the vertical. If such an offset is made at an angle greater than 45° (0.785 rad) from the vertical, the required diameter of the offset and the stack below it shall be determined as for a building drain (See Table 725.A.1 of this code).

D. Offsets of More Than 45 Degrees. A stack with an offset of more than 45° (0.785 rad) from the vertical shall be sized as follows:

1. The portion of the stack above the offset shall be sized as for a regular stack based on the total number of fixture units above the offset;

2. The offset shall be sized as for a building drain (See Column 5 in Table 725.A.1 of this code);

3. The portion of the stack below the offset shall be sized as for the offset or based on the total number of fixture units on the entire stack, whichever is larger (See Column 4 in Table 725.A.2 of this code); and,

4. A relief vent for the offset shall be installed as provided in Chapter 9 of this code and in no case shall a horizontal branch connect within the offset or within 2 feet (610 mm) above or below the offset.

E. Omission of Offset Reliefs. Offset relief vents required by §727.D of this code may be omitted by sizing the stack and its offset one pipe size larger than required for a building drain (See Column 5 in Table 725.A.1 of this code) but in no case shall the entire stack and offset be of less cross-sectional area than that required for a straight stack plus the area of an offset relief vent as provided in §931.B of this code. Omission of relief vents in accordance with this Subsection shall not constitute approval of horizontal branch connections within the offset or within 2 feet (610 mm) above or below the offset. See §727.A of this code for offsets of 45° (0.785 rad) or less.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2855 (November 2012).

§729. Waste Stacks Serving Kitchen Sinks

A. In a one or two family dwelling only in which the waste stack or vent receives the discharge of a kitchen sink and also serves as a vent for fixtures connected to the horizontal portion of the branch served by the waste stack, the minimum size of the waste stack up to the highest sink branch connection shall be 2-inch diameter. Above that point the size of the stack shall be governed by the total number of fixture units vented by the stack.

1. Note: The requirement/allowance under §729.A of this code is only applicable if the requirement of §905.C.1 of this code has been satisfied elsewhere on the building drain. When the requirement of §905.C.1 of this code has not been satisfied elsewhere on the building drain, then the entire waste stack and vent mentioned in §729.A of this code shall be sized to conform to §905.C.1 of this code.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2855 (November 2012).

§731. Sumps and Ejectors

A. Building Drains below Sewer. Building drains which cannot be discharged to the sewer by gravity flow shall be discharged into a tightly covered and vented sump from which the liquid shall be lifted and discharged into the building gravity drainage system by automatic pumping equipment or by any equally efficient method approved by the plumbing official.

B. Check and Gate Valve Required. A check valve and a gate valve shall be installed in the pump or ejector discharge piping between the pump or ejector and the gravity drainage system. Such valve shall be accessibly located above the sump cover required by §731.A of this code, or when the discharge pipe from the ejector is below grade_(G), the valves may be accessibly located outside the sump below grade_(G) in an access pit with removable access cover.

C. Sewage Ejector Sump Construction. Sumps may be constructed of cast iron or monolithically poured reinforced concrete. When concrete sumps are used, a cover attachment ring shall be embedded in the concrete in such a way as to be watertight and gastight. The attachment ring shall be designed to fit the sump cover and allow a gastight and watertight seal to be made. Other engineered sump construction and materials may be accepted by the plumbing official when designed to be watertight and gastight and otherwise meet the requirements of this Section.

D. Venting. The system of drainage piping below the sewer level shall be installed and vented in a manner similar to that of the gravity system.

E. Duplex Equipment. Sumps receiving the discharge of more than six water closets shall be provided with duplex pumping equipment.

F. Vent Sizes. Building sump vents shall be sized in accordance with Table 937.B of this code but shall in no case be sized less than 1 1/2 inches.

G. Separate Vents. Vents from pneumatic ejectors or similar equipment shall be carried separately to the open air as a vent terminal (see §927.A of this code).

H. Connections. Direct connection of a steam exhaust, blowoff, or drip pipe shall not be made with the building drainage system. Waste water when discharged into the building drainage system shall be at a temperature not higher than 140°F (60°C). When higher temperatures exist, proper cooling methods shall be provided.

I. Pumping Station. Pumping stations shall comply with the following.

1. A pumping system shall include the sump pump, sump pit and discharge piping as specified below:

a. Sump Pump. An automatic water pump for the removal of drainage from a sump, pit or low point in a residential, commercial or industrial property. Capacity and head shall be appropriate to anticipated use requirements.

b. Sump Pit. The sump pit shall be not less than 18 inches (457 mm) diameter and 24 inches (610 mm) deep, unless approved by the plumbing official. The pit shall be accessible and located such that all drainage flows into the pit due to gravity. The sump pit may be constructed of tile, concrete, steel, plastic or other approved materials. The pit bottom shall be solid and provide permanent support for the pump. The sump pit shall be fitted with a removable cover adequate to support anticipated loads in the area of use and to prevent refuse from entering the pit.

c. Discharge piping. Discharge piping shall meet the requirements of §731.B of this code.

2. Electrical service outlet when required shall meet the requirements of the NFPA 70 or local codes.

3. Sumps which receive and discharge liquid wastes or raw sewage from plumbing fixtures shall meet the applicable requirements of §731.C of this code.

J. Maximum Effluent Level. The effluent level control, etc., shall be adjusted and maintained to at all times prevent the effluent in the sump from rising to within 2 inches (51 mm) of the invert of the gravity drain inlet into the sump.

K. Ejector Connection to the Drainage System. Pumps when connected to the drainage system shall connect to the building sewer or shall connect to a wye fitting in the building drain a minimum of 10 ft (3048 mm) from the base of any soil stack, waste stack or fixture drain.

L. Macerating Systems. Macerating toilet systems shall comply with ASME A 112.3.4 and shall be installed per the manufacturer's instructions. The outlet piping from the grinder pump shall not be less than 3/4-inch and shall be fitted with a check valve and a full-flow gate or ball valve.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2856 (November 2012).

§733. Repairs to Drainage System via Re-route

A. In the case where it is determined that there is a broken underground drain line including, but not limited to, broken drain lines under the slab of a building, and a drain line re-route is performed, the existing broken underground drain line shall be cut or otherwise disconnected from the entire drainage system. At the point of such cutting or disconnection, the entire circumference of the existing pipe which remains connected to the drainage system shall have a wall thickness of not less than 1/8-inch. The existing pipe which remains connected to the drainage system shall be sealed watertight and gastight using approved plumbing materials and joining/jointing methods, e.g., properly install an approved cap, plug, or cleanout on the cut or disconnected pipe.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2856 (November 2012).

§735. Additional Provisions for Sanitary Drainage

A. Additional provisions for sanitary drainage are found in the following:

1. LAC 51:XIV.705.H, Installation of Building Sewers;

2. LAC 51:XIV.Chapter 13, Medical Facilities Plumbing Systems;

3. LAC 51:XIV.Chapter 15, Travel Trailers and Travel Trailer Parks;

4. LAC 51:XIV.Chapter 16, Mobile/Manufactured Homes and Mobile/Manufactured Home Parks; and

5. LAC 51:XIV.Chapter 17, Sewerage System Regulations.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2856 (November 2012).

Chapter 8. Indirect and Special Wastes

§801. General

A. Scope. The provisions of this Chapter shall govern the materials, design, construction, and installation of indirect and special wastes systems.

B. Tests. The indirect and special waste system shall be tested in accordance with §319 of this code.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2857.

§803. Material and Size

A. The material and size of indirect waste piping shall be in accordance with the provisions applicable to sanitary drainage piping in Chapter 7 of this code. Acid and chemical indirect waste pipes shall be of materials unaffected by the discharge of such wastes.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2857 (November 2012).

§805. Indirect Waste Methods

A. Air gap (drainage system). The air gap (drainage system) between the indirect waste and the building drainage system shall be at least twice the diameter of the effective opening of the indirect waste pipe, but in no case less than 2 inches (51 mm), and shall be provided by extending the indirect waste pipe to an open, accessible floor sink, service sink, floor drain, hub drain or other suitable fixture which is properly trapped and vented. The indirect waste pipe shall terminate a sufficient distance above the flood-level rim of the sink or receptor to provide the minimum required air gap and shall be installed in accordance with other applicable Sections of this code.

B. Air break (drainage system). The air break (drainage system) between the indirect waste and the building drainage system shall be installed such that the level of the lowest outlet located on the fixture, device, appliance or apparatus (to which the indirect waste pipe connects) is above the flood-level rim of the receiving sink or other receptor by a vertical distance of at least twice the diameter of the effective opening of the indirect waste pipe, but in no case less than 2 inches (51 mm). In addition, the indirect waste pipe shall terminate below the flood-level rim of the receiving sink or other receptor a distance equal to not more than one-half (1/2) the diameter of the effective opening of the indirect waste pipe.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2857 (November 2012).

§807. Indirect Waste Connections

A. Food Handling. Establishments engaged in the storage, preparation, selling, serving, processing or other handling of food shall have the waste piping from all food handling equipment indirectly connected to the drainage system through an air gap (drainage system) or air break (drainage system) as specified in §805 of this code. Food handling equipment includes but is not limited to the following: any sink where food is cleaned, peeled, cut up, rinsed, battered, defrosted or otherwise prepared or handled; potato peelers; ice cream dipper wells; refrigerators; freezers; walk-in coolers or freezers; ice boxes; ice making machines; fountain type drink dispensers; rinse sinks; cooling or refrigerating coils; laundry washers; extractors; steam tables; steam kettles; egg boilers; coffee urns; or similar equipment.

1. Exception. An air gap (drainage system) is the only acceptable method of indirectly connecting any food handling equipment wherein the indirect waste pipe may be under a vacuum.

B. Commercial Dishwashing Machines. Commercial dishwashing machines shall be indirectly connected.

C. Connections. The following types of connections shall be indirect waste connections in accord with the specifications stated below.

1. Water Supply Connections. Drains, overflows or relief lines from the water distribution system shall waste into an indirect waste receptor through an air gap (water distribution).

2. Air Conditioning Unit Connections. Indirect waste connections shall be provided for drains, overflows, or relief lines from air conditioning units.

D. Sterile Materials. Appliances, devices, or apparatus such as stills, sterilizers, and similar equipment, requiring water and waste connections and used for sterile material, shall be indirectly connected or provided with an air gap (drainage system) between the trap and the appliance.

E. Drips. Appliances, devices, or apparatus not regularly classed as plumbing fixtures but which have drips or drainage outlets shall be drained by indirect waste pipes discharging into an open receptacle as provided in §805 of this code.

F. Cleanliness. The sink or receptor receiving indirect wastes shall be water-supplied if the waste stream contains or is expected to contain a sufficient amount of organic matter capable of causing odors or otherwise causing a nuisance due to an insufficient dilution of the waste material discharged into the sink or receptor.

G. Receptors. Waste/plumbing receptors serving indirect waste pipe discharges shall meet the following requirements.

1. Installation. Waste receptors serving indirect waste pipes shall not be installed in any toilet room, nor in any inaccessible or unventilated space such as a closet or storeroom.

2. Strainers and Baskets. Every indirect waste receptor receiving discharge containing particles that would clog the receptor shall be equipped with a basket or other device which shall prevent passage into the drainage system of solids 1/2-inch (12.7 mm) or larger in size. The basket or device shall be removable for cleaning purposes.

3. Splashing. All plumbing receptors receiving the discharge of indirect waste pipes shall be of such shape and capacity as to prevent splashing or flooding. No plumbing fixture which is used for domestic or culinary purposes shall be used to receive the discharge of an indirect waste pipe.

H. Clear Water Wastes. Water lifts, expansion tanks, cooling jackets, sprinkler systems, drip or overflow pans or similar devices which waste clear water only, shall discharge into the building drainage system through an indirect waste.

I. Hot Water Drainage. A steam pipe shall not connect directly to any part of a drainage system, nor shall any water above 140ºF (60ºC) be discharged directly into any part of a drainage system.

J. Drinking Fountains. Drinking fountains may be installed with indirect wastes.

K. Swimming Pools. Piping carrying waste water from swimming or wading pools, including pool drainage, backwash from filters, water from scum gutter drains or floor drains which serve walks around pools, shall be installed as an indirect waste utilizing a circulation pump, if necessary, when indirect waste line is below the sewer grade_(S).

L. Residential Washing Machines (clothes washers). All residential washing machines shall connect to the building drainage system via an individual indirect waste pipe for each machine using one of the indirect waste methods specified in §805 of this code.

1. Any machines which discharge by gravity shall discharge into an adequately sized individual receptor, such as a floor sink. Such receptor/floor sink shall be properly trapped, vented, and directly connected to the drainage system.

M. Commercial Laundry Machines. All commercial laundry washing machines shall connect to the building drainage system via an individual indirect waste pipe for each machine using one of the indirect waste methods specified in §805 of this code.

1. Any machines which discharge by gravity shall individually discharge into an adequately sized receptor trough/pit or adequately sized individual receptors, such as floor sinks. Such receptor trough/pit or floor sinks shall be properly trapped, vented, and directly connected to the drainage system.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2857 (November 2012).

§809. Limitations

A. The following limitations/requirements shall apply to indirect waste pipes.

1. Indirect waste piping exceeding 2 ft (610 mm) long shall be trapped.

2. The maximum length of the indirect waste to indirect waste receptor shall not exceed 15-feet (4527 mm). Should an indirect waste pipe exceed 15 feet in length, a local vent shall be provided at a maximum of every 15 feet in length.

B. Cleaning. Indirect waste piping shall be so installed as to permit ready access for flushing and cleansing.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2858 (November 2012).

§811. Additional Provisions for Indirect and Special Wastes

A. Additional provisions for indirect and special wastes are found in the following:

1. LAC 51:XIV.Chapter 13, Medical Facilities Plumbing Systems;

2. LAC 51:XIV.Chapter 15, Travel Trailers and Travel Trailer Parks;

3. LAC 51:XIV.Chapter 16, Mobile/Manufactured Homes and Mobile/Manufactured Home Parks; and,

4. LAC 51:XIV.Chapter 17, Sewerage System Regulations;

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2858 (November 2012).

Chapter 9. Vents

§901. General

A. Scope. The provisions of this Chapter shall govern the materials, design, construction, and installation of vents.

B. Protection of Trap Seals. The protection of trap seals from siphonage or back pressure shall be accomplished by the appropriate use of soil or waste stacks, vents, revents, back vents, loop vents, circuit or continuous vents or combination thereof, installed in accordance with the requirements of this Chapter and the limitations set forth in §303.H.2 of this code.

C. Tests. The venting system shall be tested in accordance with §319.B of this code.

D. Engineered Systems. Engineered sanitary drainage and venting systems shall conform to the provisions of Chapter 12, Alternate Designed Plumbing Systems, of this code.

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2858 (November 2012).

§903. Materials

A. Vents. Pipe, tubing, and fittings for the vent piping system shall comply with the provisions of Chapter 7 of this code.

B. Specific Type. Standards given in Table 703 of this code apply to the specific materials approved for use and as indicated in the various Sections in this Chapter.

C. Piping above Ground. Vent piping shall be of cast iron, galvanized steel, brass or copper pipe, copper tube of a weight not less than that of copper drainage tube Type DWV, and Schedule 40 plastic piping. Vent piping used in acid waste systems shall be of the same material used in the acid soil and waste piping (see §703.F of this code).

D. Piping Underground. Vent piping placed underground shall be of cast iron, copper tube of a weight not less than that of Type DWV, Schedule 40 plastic piping or heavy schedule borosilicate glass, provided that other materials may be used for underground vents when found adequate and installed as directed by the plumbing official. Vent piping used in acid waste systems shall be of the same material used in the acid soil and waste piping (see §703.F of this code). Materials subject to corrosion shall be protected when installed in corrosive soil.

E. Fittings. Fittings shall be compatible to the type of pipe used in the vent system as required by §§903.B, 903.C and 903.D of this code.

1. Vent pipes installed less than 6 inches above the flood-level rim of fixture(s) served shall be installed with approved drainage fittings (i.e., short turn quarter bends shall be prohibited).

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2858 (November 2012).

§905. Vent Stacks

A. Installation. A vent stack or main vent shall be installed with a soil or waste stack whenever back vents, relief vents or other branch vents are required in two or more branch intervals. No fixture shall be permitted to drain into any stack above any vent connection.

B. Terminal. The vent stack shall terminate independently above the roof of the building or shall be connected with the extension of the soil or waste stack (stack-vent) at least 6 inches (152 mm) above the flood-level rim of the highest fixture.

C. Main Stack. The main vent stack or stack vent shall comply with the following.

1. Every building in which plumbing is installed shall have at least one main vent stack or stack vent, of not less than 3-inch (76 mm) diameter, for each building drain, when connected separately to a building sewer, septic tank, or other sewage collection and/or disposal system approved by the state health officer. Such vent shall run undiminished in size and as directly as possible from the building drain through to the open air above the roof.

2. The main vent stack in a detached garage or other accessory building where only a washing machine or laundry tray is installed may be 1 1/2 inches (38 mm).

AUTHORITY NOTE: Promulgated in accordance with R.S. 40:4(A)(7) and R.S. 40:5(2)(3)(7)(9)(16)(17)(20).

HISTORICAL NOTE: Promulgated by the Department of Health and Hospitals, Office of Public Health, LR 38:2859 (November 2012).