A. 
Old house sewers can be used in connection with a new building or new plumbing only when they are found, on examination by the Superintendent, to conform in all respects to the requirements governing new sewers.
[Amended 3-25-1968]
B. 
The house sewer must be properly connected with the main sewer in the street and must be of extra-heavy cast-iron pipe with lead-caulked joints. An arched or other proper opening must be provided for the drain in the wall, to prevent damage by settlement.
C. 
The house drain and its branches must be of extra-heavy cast iron when underground, and of extra-heavy cast iron or galvanized wrought iron or steel when aboveground.
D. 
The house drain, if above the cellar floor, must be supported at intervals of 10 feet by eight-inch brick piers or suspended from the floor beams, or be otherwise properly supported by proper hangers placed not more than 10 feet apart.
E. 
No steam exhaust, boiler blow off or drip pipe shall be connected with the house drain. Such pipes must first discharge into a proper condensing tank and from this a proper outlet to the house sewer outside of the building must be provided, and a separate vent from condensing tank to outer air must be provided. In low-pressure steam systems the condensing tank may be omitted, but the waste connections must be otherwise as above required.
F. 
The house drain and house sewer must be run as direct as possible with a fall of at least 1/4 of an inch per foot, all changes in direction made with proper fittings, and all connections made with Y branches and 1/8 and 1/16 bends.
G. 
The house sewer and house drain must be at least four inches in diameter when receiving the discharge of a water closet. No house sewer or house drain shall be of less diameter than the largest line of pipe connected thereon.
H. 
Full-size Y and T branch fittings for handhole cleanout must be provided where required on the house drain and its branches. No cleanout need be larger than six inches in diameter.
I. 
An iron running trap must be placed in the house drain near the front wall of the house, and on the sewer side of all connections, except a Y fitting used to receive the discharge from an automatic sewerage lift or oil separator, where one is used. If placed outside of the house or below the cellar floor, it must be made accessible in a brick manhole, the walls of which must be eight inches thick, with an iron or flagstone cover. When outside the house it must never be less than three feet below the surface of the ground. All cleanouts on traps or drains underground must be made accessible in brick manholes or boxes with suitable cover.
J. 
When the plumbing system of any building is altered by the addition of new soil, waste or vent lines and no house trap and fresh-air inlet exists on the house drain, same shall be provided.
K. 
The house trap must have two cleanouts, with brass screw-cap ferrules caulked in.
L. 
No curb box or similar device with grating placed in sidewalk will be permitted for fresh-air inlets.
M. 
Where the main sewer enters the building, a Y shall be placed on the end of same and at the bottom of each vertical line of soil pipe; also, a cleanout shall be placed at the end of each horizontal line and at each change in direction.
N. 
A fresh-air inlet pipe must be connected with the house drain just inside of the house trap and extended to the outer air, terminating with the open end at least one foot above the grade, and at least two feet away from any door or window at the most available point to be approved by the Plumbing Inspector and shown on plans. The fresh-air inlet pipes shall be 1/2 the diameter of the house drain but not less than four inches in diameter. The fresh-air inlet shall be equipped with a perforated brass plate or return bend.
A. 
All main, soil, waste or vent pipes must be of iron, steel or brass.
B. 
When they receive the discharge of fixtures on any floor above the first, they must extend in full caliber at least one foot above the roof coping, and well away from any and all shafts, windows, chimneys or other ventilating openings. When less than four inches in diameter, they must be enlarged to four inches at a point not less than one foot below the roof surface by an increaser not less than nine inches long.
C. 
No caps, cowls or bends shall be affixed to the top of such stack. When roofs are used for drying purposes or roof gardens, all pipes shall be extended to a height of seven feet.
D. 
Necessary offsets above the highest fixture branch must not be made at an angle of less than 45° to the horizontal.
E. 
Soil and waste pipes must have a proper Y or TY branches for all fixture connections.
F. 
No connection to lead branches for water closets or slop sinks will be permitted except the required branch vent.
G. 
Branch soil and waste pipe must have a fall of at least 1/4 inch per foot.
H. 
Short TY branches will be permitted on vertical lines only. Long 1/4 bends and long TYs are permitted. Short 1/4 bends and double hubs, short roof increases and common offsets, and bands and saddles, are prohibited.
I. 
All branch soil pipes for water closets shall not be less than four inches. The diameters of soil and waste pipes must not be less than those given in the following tables.
Every office building, school, store, warehouse, manufacturing establishment or other structure, where workers are or will be employed, shall be provided with at least one water closet.
A. 
Water closets.
(1) 
Water closets shall be provided for each sex according to the following table. The number of water closets to be provided for each sex shall in every case be based upon the maximum number of persons of that sex employed at any one time on the given floor, or floors, or in the structure for which such closets are provided.
Number of Persons
Number of Closets
Ratio
1 to 15
1
1 for 15
16 to 35
2
1 for 17 1/2
36 to 55
3
1 for 18 1/3
56 to 80
4
1 for 20
81 to 110
5
1 for 22
111 to 150
6
1 for 25
151 to 190
7
1 for 27 1/7
(2) 
Thereafter, water closets shall be provided at the rate of one closet for every 30 persons, except that in schools designed for a minimum occupancy of 400 pupils, at least one toilet fixture shall be provided for each 40 pupils, and in toilets for boys, at least 1/4 of the fixtures shall be water closets.
B. 
For dwellings to be occupied by one or two families, at least one water closet shall be provided for each family in the apartment occupied by such family.
C. 
Places of public or semipublic assembly accommodating large numbers of persons shall be provided with a sufficient number of water closets and urinals as directed by the Inspector.
A. 
The following table, based upon the rate of discharge from a lavatory as the unit, shall be employed to determine fixture equivalents:
Fixture
Number of Units
1 lavatory or wash basin
1
1 bathtub
2
1 laundry tray
2
1 sink, except slop sink
2
1 combination fixture
3
1 urinal
3
1 shower bath
2
1 floor drain
2
1 slop sink
3
1 water closet
6
1 slop sink with flushing rim
6
1 drinking fountain
1/2
1 dental cuspidor
1/2
1 bathroom group containing 1 water closet, 1 lavatory and 1 bathtub, with or without shower, or 1 shower shall
6
1 bathroom group containing 1 water closet, 1 lavatory, 1 bathtub and 1 shower
7
Sterilizers with 1/2-inch waste connections
1/2
Each 1,000 gallons of capacity of a swimming pool
1
B. 
For fixtures other than those mentioned in the above list, the number of units shall be established by the size of the waste connections on the following basis:
Size of Waste Outlets in Fixtures
Number of Units
1/2 inch, 3/4 inch, less than 1 inch
1/2
1 inch
1
1 1/4 inches
2
1 1/2 inches
3
2 inches
5 1/2
2 1/2 inches
8
3 inches
15
4 inches
30
5 inches
50
6 inches
80
8 inches
160
C. 
Where the term "water closet' is used, it shall include bedpan washers, hoppers and similar fixtures receiving fecal matter.
A. 
Minimum sizes of soil and waste branches to individual fixtures shall be in accordance with the following table:
(1) 
Water closet: four inches.
(2) 
Floor drain: three inches.
(3) 
Urinal: two inches.
(4) 
Slop sink: three inches.
(5) 
Sink, except slop sink: two inches.
(6) 
Bathtub: 1 1/2 inches.
(7) 
Laundry tray: 1 1/2 inches.
(8) 
Shower bath: two inches.
(9) 
Lavatory: 1 1/2 inches.
(10) 
Drinking fountain: 1 1/2 inches.
(11) 
Dental cuspidor: 1 1/2 inches.
(12) 
Sterilizers with one-half-inch waste outlet: 1 1/2 inches.
(13) 
Combination fixture, laundry tubs and kitchen sinks: two inches.
B. 
The size of any stack, house drain and house sewer shall be at least that of the largest branch connected to it.
The required size of branch soils and wastes receiving the discharge of two or more fixtures shall be determined on the basis of the total number of fixture units drained by branch soils and wastes, in accordance with the following table:
Maximum Number of Fixture Units Permitted
Maximum Number of Water Closets Permitted
Diameter of Branches
(inches)
2
—
1 1/2
9
—
2
20
—
2 1/2
35
1
3
100
11
4
250
28
5
A. 
Soil and waste stacks shall extend through the roof undiminished in size as such size is established at the base, but never be less than four inches.
B. 
Soil and waste stacks shall be as direct as possible, and such stacks shall be free from sharp angles and turns. The required size of a soil or waste stack shall be independently determined by the fixture units connected to such stack and the total length, in accordance with the following table:
Size of Stacks
Maximum Number of Fixture Units Permitted
Maximum Number of Water Closets Permitted
Diameter of Stack
(inches)
Maximum Developed Lengths
(feet)
4
—
1 1/2
50
14
—
2
75
36
—
2 1/2
100
90
1
3
150
400
40
4
300
1,000
120
5
500
1,800
200
6
Unlimited
3,500
400
8
Unlimited
5,000
600
10
Unlimited
C. 
When the above table calls for a stack four inches or more in diameter which does not receive the discharge of any water closet, the diameter may be reduced one size without changing the loading or the developed length.
D. 
It shall be unlawful to discharge water closets into a stack less than three inches in diameter. It shall be unlawful to discharge more than one water closet into a three-inch stack.
A. 
The required size of sanitary house drains and sanitary house sewers shall be determined on the basis of the total number of fixture units drained by them, in accordance with the following table:
Maximum Number of Fixture Units Permitted
Diameter of House Drain
(inches)
2
1 1/2
9
2
25
2 1/2
70
3
200
4
400
5
400
5
660
6
1,500
8
2,800
10
5,000
12
B. 
The minimum size of a house drain receiving the discharge of a water closet shall be four inches in diameter, continued full size to all vertical stacks receiving the discharge of a water closet.
[Amended 8-16-1965]
A. 
No person shall discharge or cause to be discharged any stormwater, surface water, groundwater, roof runoff, subsurface drainage, uncontaminated cooling water, or unpolluted industrial process waters to any sanitary sewer.
B. 
Stormwater and all unpolluted drainage shall be discharged to such sewers as are specifically designated as combined sewers or storm sewers, or to a natural outlet approved by the Superintendent. Industrial cooling water or unpolluted process waters may be discharged, on approval of the Superintendent, to a storm sewer, combined sewer, or natural outlet.
C. 
No person shall discharge or cause to be discharged any of the following described waters or wastes to any public sewers:
(1) 
Any gasoline, benzene, naptha, fuel oil or other flammable or explosive liquid, solid or gas.
(2) 
Any waters containing toxic or poisonous solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, to injure or interfere with any sewage treatment process, constitute a hazard to human or animals, create a public nuisance, or create any hazard in the receiving waters of the sewage treatment plant, including but not limited to cyanides in excess of two mg/l as CN in the wastes as discharged to the public sewer.
(3) 
Any waters or wastes having pH lower than 5.5, or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personnel of the sewage works.
(4) 
Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers or other interference with the proper operation of the sewage works such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails and paper dishes, cups, milk containers, etc., either whole or ground by garbage grinders.
D. 
No person shall discharge or cause to be discharged the following described substances, materials, waters, or wastes if it appears likely in the opinion of the Superintendent that such wastes can harm either the sewers, sewage treatment process, or equipment, have an adverse effect on the receiving stream, or can otherwise endanger life, limb, public property, or constitute a nuisance. In forming his opinion as to the acceptability of these wastes, the Superintendent will give consideration to such factors as the quantities of subject wastes in relation to flow and velocities in the sewers, materials of construction of the sewers, nature of the sewage treatment process, capacity of the sewage treatment plant, degree of treatability of wastes in the sewage treatment plant, and other pertinent factors. The substances prohibited are:
(1) 
Any liquid or vapor having a temperature higher than 150° F. (65° C.).
(2) 
Any water or waste containing fats, wax, grease or oils, whether emulsified or not, in excess of 100 mg/l or containing substances which may solidify or become viscous at temperatures between 32° F. and 150° F. (0° C. and 65° C.).
(3) 
Any garbage that has not been properly shredded. The installation and operation of any garbage grinder equipped with a motor of 3/4 horsepower (0.76 hp metric) or greater shall be subject to the review and approval of the Superintendent.
(4) 
Any waters or wastes containing strong acid iron pickling wastes, or concentrated plating solutions, whether neutralized or not.
(5) 
Any waters or wastes containing iron, chromium, copper, zinc and similar objectionable or toxic substances; or wastes exerting an excessive chlorine requirement, to such degree that any such material received in the composite sewage at the sewage treatment works exceeds the limits established by the Superintendent for such materials.
(6) 
Any waters or wastes containing phenols or other taste- or odor-producing substances, in such concentrations exceeding limits which may be established by the Superintendent as necessary, after treatment of the composite sewage, to meet the requirements of the state, federal, or other public agencies of jurisdiction for such discharge to the receiving waters.
(7) 
Any radioactive wastes or isotopes of such half-life or concentration as may exceed limits established by the Superintendent in compliance with applicable state or federal regulations.
(8) 
Any waters or wastes having a pH in excess of 9.5.
(9) 
Materials which exert or cause:
(a) 
Unusual concentrations of inert suspended solids (such as, but not limited to, Fullers earth, lime slurries and lime residues) or of dissolved solids (such as, but not limited to, chlorides and sodium sulfate).
(b) 
Excessive discoloration (such as, but not limited to, dye wastes and vegetable tanning solutions).
(c) 
Unusual BOD, chemical oxygen, or chlorine requirements in such quantities as to constitute a significant load on the sewage treatment works.
(d) 
Unusual volume of flow or concentration of wastes containing "slugs" as defined herein.
(10) 
Waters or wastes containing substances which are not amenable to treatment or reduction by the sewage treatment processes employed, or are amenable to treatment only to such degree that the sewage treatment plant effluent cannot meet the requirements of other agencies having jurisdiction over discharge to the receiving waters.
E. 
Remediation of harmful discharges.
(1) 
If any waters or wastes are discharged, or are proposed to be discharged to the public sewers, which waters contain the substances or possess the characteristics enumerated in Subsection D of this section, and which, in the judgment of the Superintendent, may have a deleterious effect upon the sewage works, process, equipment, or receiving waters or which otherwise create a hazard to life or constitute a public nuisance, the Superintendent may:
(a) 
Reject the wastes;
(b) 
Require pretreatment to an acceptable condition for discharge to the public sewer;
(c) 
Require control over the quantities and rates of discharge; and/or
(d) 
Require payment to cover the added cost of handling and treating the wastes not covered by existing taxes or sewer charges under the provisions of Subsection J of this section.
(2) 
If the Superintendent permits the pretreatment or equalization of waste flows, the design and installation of the plants and equipment shall be subject to the review and approval of the Superintendent and subject to the requirements of all applicable codes and laws.
F. 
Grease, oil and sand interceptors shall be provided when, in the opinion of the Superintendent, they are necessary for the proper handling of liquid wastes containing grease in excessive amounts, or any flammable wastes, sand or other harmful ingredients; except that such interceptors shall not be required for private living quarters or dwelling units. All interceptors shall be of a type and capacity approved by the Superintendent, and shall be located so as to be readily and easily accessible for cleaning and inspection.
G. 
Where preliminary treatment or flow-equalizing facilities are provided for any waters or wastes, they shall be maintained continuously in satisfactory and effective operation by the owner at his expense.
H. 
When required by the Superintendent, the owner of any property serviced by a sewer carrying industrial wastes shall install a suitable control manhole together with such necessary meters and other appurtenances in the building sewer to facilitate observation, sampling, and measurement of the wastes. Such manhole, when required, shall be accessibly and safely located, and shall be constructed in accordance with plans approved by the Superintendent. The manhole shall be installed by the owner at his expense, and shall be maintained by him so as to be safe and accessible at all times.
I. 
All measurements, tests and analyses of the characteristics of waters and wastes to which reference is made in this chapter shall be determined in accordance with the latest edition of "Standard Methods for the Examination of Water and Wastewater," published by the American Public Health Association, and shall be determined at the control manhole provided, or upon suitable samples taken at said control manhole. In the event that no special manhole has been required, the control manhole shall be considered to be the nearest downstream manhole in the public sewer to the point at which the building sewer is connected. Sampling shall be carried out by customarily accepted methods to reflect the effect of constituents upon the sewage works and to determine the existence of hazards to life, limb, and property. (The particular analyses involved will determine whether a twenty-four-hour composite of all outfalls of a premises is appropriate or whether a grab sample or samples should be taken. Normally, but not always, BOD and suspended solids analyses are obtained from twenty-four-hour composites of all outfalls, whereas pHs are determined from periodic grab samples.)
J. 
No statement contained in this article shall be construed as preventing any special agreement or arrangement between the city for treatment, subject to payment therefor by the industrial concern.
A. 
The required sizes of stormwater house drains, house sewers and all other stormwater piping shall be determined on the basis of the total drained area in horizontal projection, in accordance with the following table:
Size of Piping for Stormwater Only
Maximum Drained Area
(square feet)
A
B
C
Diameter of Pipe
(inches)
Fall 1/8 inch to a foot
Fall 1/4 inch to a foot
Fall 1/2 inch to a foot
2
250
350
500
2 1/2
450
600
900
3
700
1,000
1,500
4
1,500
2,100
3,000
5
2,700
3,800
5,500
6
4,300
6,100
9,000
8
9,600
13,000
19,000
10
16,500
24,000
35,000
12
27,000
40,000
56,000
B. 
The size of the horizontal run from the base of the leader to the house drain, including the trap, shall be in accordance with the above table.
C. 
Leaders shall be at least of the size required in Column C of the above table.
Main vents or vent stacks shall connect at their base to the main soil or waste pipe at least three feet below the lowest vent branch. Such stacks shall extend undiminished and unincreased in size above the roof or such stacks shall be reconnected with the main soil or waste stack at least three feet above the highest fixture branch. The pipe above the intersection shall be increased to a minimum of four inches through roof.
A. 
The required size of the vent shall be determined on the basis of the size of the soil or waste stack, the number of fixture units connected to the vent and the developed length of the pipe, in accordance with the following table. Vents shall be at least 1 1/2 inches in diameter. The diameter of every vent stack shall be at least 1/2 the diameter of the soil or waste stack served. In determining the developed length of vent pipes, the vent stack and branches shall be considered continuous.
Vent Stacks and Branches
Diameter of Pipe
(inches)
Maximum Number of Fixture Units Permitted
Maximum Developed Length for Each Size
(feet)
1 1/2
6
25
2
40
60
2 1/2
72
100
3
120
150
4
250
250
5
500
300
6
1,250
400
8
2,400
Unlimited
10
3,000
Unlimited
12
5,000
Unlimited
B. 
Where main stacks are grouped together at the top of a structure into one pipe which extends through the roof, such combined vent shall be at least equal in area to 75% of the sum of the areas of the stacks connecting into such combined vent.
A. 
Wet vents may be allowed at the discretion of the Plumbing Inspector.
B. 
A vent branch of 1 1/2 inches may be used for a single set of bathroom fixtures, one water closet, one basin, one bathtub or shower.
C. 
The exception to soil stacks is that a three-inch soil stack may be used on bungalow-type homes and in instances where it is impossible to install another bathroom above, and at the discretion of the Plumbing Inspector.
D. 
Floor drains are allowed only where necessary and at the discretion of the Plumbing Inspector. Floor drains above the first floor must be vented.
A. 
No form of trap will be permitted to be used unless it has been approved by the Plumbing Inspector. No antisiphon trap or deep-seal siphon-jet fixture shall be approved until it has successfully passed such test as may be prescribed by the Examining Board of Plumbers.
B. 
No mason's cesspool, bell, pot, bottle or D-trap will be permitted, nor any form of trap that is not self-cleaning, nor that has interior chamber or mechanism, nor any trap except earthenware ones that depend upon interior partitions for a seal. Backwater or tide valves will only be permitted when it can be shown to the satisfaction of the Plumbing Inspector that their use is absolutely necessary and of a type as approved by him.
C. 
Every fixture must be separately trapped by a water-sealing trap placed as close to the fixture outlet as possible.
D. 
A set of not more than four wash trays may use the same trap, if the fixtures are located immediately and compactly together. A combination sink and wash tray may use one trap. Cement wash trays will not be permitted.
E. 
The discharge from any fixture must not pass through more than one trap before reaching the house drain.
F. 
All traps must be well-supported and set true with respect to their water levels.
G. 
All fixtures, other than water closets and urinals, must have strong metallic strainers or bars over the outlets to prevent obstruction of the waste pipe. All urinals shall be placed on a concrete step and step to pitch to urinal.
H. 
All exposed or accessible traps, except water-closet traps, must have brass trap screws for cleaning the trap placed on the inlet side, or below the water level.
I. 
All iron traps for house drain and other drains must be running traps with handhole cleanouts of full size of the traps, when same are less than five inches. All traps underground must be made accessible by brick manholes with proper covers. In buildings of one or more stories where fixtures are located on the ground floor, same may be vented by a two-inch pipe provided that fixtures are not more than 15 feet from the main soil line which goes directly to the roof.
J. 
Overflow pipes from fixtures must in all cases be connected on the inlet side of traps.
K. 
All earthenware traps must have approved heavy brass floor plates properly secured to the branch soil pipe and bolted to the trap flange, with the joint made gastight. The use of rubber washers for floor connections is prohibited. All floor flanges must be set in place and inspected before any water closet is set thereon.
L. 
No trap shall be placed at the foot of main soil and waste pipe lines.
M. 
Every plunge bath or swimming pool shall be provided with a trap at least four inches in diameter, and this waste shall be controlled by a gate valve. Overflow pipes, if provided, must be connected on inlet side of the trap. Except where an approved antisiphon trap is installed in the manner specified, such trap must be ventilated by a separate vent line extended above the roof, of the same size as the trap and water connection, and system shall be chlorinated.
N. 
All water-closet seats in public places shall be open front.
O. 
Every dental cuspidor must be separately trapped by a trap at least 1 1/2 inches in diameter, which shall be vented, except where an approved antisiphon trap is installed in the manner specified, and placed as close to the fixture as possible. The connection between trap and cuspidor may be 3/4 inch in diameter.
P. 
The waste of every bar sink, soda fountain and drinking fountain must discharge over a properly water-supplied, trapped sink with the trap vented. The main waste lines shall be two inches in diameter and the branches to fixtures at least 1 1/2 inches in diameter. Drinking fountains must be trapped and the waste line extended through the roof. No vent connections need be provided.
A. 
Safe and refrigerator waste pipes must be of galvanized iron, and be not less than 1 1/4 inches in diameter nor larger than 1 1/2 inches in diameter with pipe branches at least one inch in diameter with strainers over each inlet.
B. 
Safe and refrigerator waste pipes shall not be trapped. They must discharge over a properly water-supplied, trapped sink, with the trap vented unless an approved antisiphon trap is installed in the manner specified, such sink to be publicly placed and not more than four feet above the floor. In no case shall any refrigerator or safe waste pipe discharge over a sink located in a room used for living or cooking purposes.
C. 
The branches on vertical lines must be made by Y or TY fittings and carried up to the safe with as much pitch as possible.
D. 
Lead safes must be graded and neatly turned over bevel strips at their edges.
E. 
Where there is an offset on a refrigerator waste pipe in the cellar, there must be cleanouts to control the horizontal part of the pipe.
F. 
In all lodgings and tenement houses, the safe and refrigerator waste pipes must extend above the roof.
(Applies except as relating to tenement houses and factories.)
A. 
Separate water closets and toilet rooms must be provided for each sex in buildings used as workshops, lofts, office buildings, factories, hotels and all places of public assembly. Vacuum breakers for flushometers must be provided.
B. 
In lodging houses there must be one water closet on each floor, and where there are more than 15 persons on any floor there must be an additional water closet on that floor for every 15 additional persons or fraction thereof.
C. 
In tenement houses, lodging houses, factories, workshops, and all public buildings, the entire water closet apartment and side walls to a height of six inches from the floor, except at the door, must be made waterproof with asphalt, cement, tile, metal or other waterproof material as approved by the Board of Trustees.
D. 
In all buildings, the water closet and urinal apartments must be ventilated to the outer air by windows opening on the same lot as the one on which the building, or by a ventilating skylight placed over each room or apartment wherein such fixtures are located.
E. 
In all buildings, the outside partition of any water closet or urinal apartment must be airtight and extended to the ceiling or be independently ceiled over. When necessary to properly light such apartments, the upper part of the partitions must be provided with translucent glass. The interior partitions of such apartments must be dwarfed partitions.
F. 
The general water closet accommodation of any building cannot be placed in the cellar, nor can any water closet be placed outside of a building, except to replace an existing water closet.
G. 
In alteration work where it is not practicable to ventilate a water closet or urinal apartment by windows or a skylight directly to the outer air, there may be provided a galvanized wrought-iron vent duct extended to the outer air, which must be equal in area to at least 144 square inches for one water closet or urinal, and an additional 72 square inches for each water closet added therein.
H. 
All water closets must have six gallons of flow in 10 seconds.
I. 
All fixtures must have over-rim water supply.
J. 
All water closets must have earthenware flushing-rim bowls. They must be set entirely free and open from all enclosing woodwork.
K. 
Pan, plunger, offset-washout and wash-out, or other water closets having an unventilated space, or whose walls are not thoroughly washed out at each discharge, will not be permitted.
L. 
All urinals must be constructed of materials impervious to moisture, and that will not corrode under the action of urine. The floor and wall of the urinal apartments must be lined with similar nonabsorbent and noncorrosive material.
M. 
The platforms of treads of urinal stalls must never be connected independently to the plumbing system, nor can they be connected to any safe waste pipe.
N. 
No privy vault or outhouse shall be built on any premises for the use of workmen during the construction of any building. Instead, there shall be installed on the premises a temporary water closet connected with the sewer and supplied with running water.