Drainage fixture unit calculator. xn--p1ai/zgzupaq/the-tech-guy-6k-tv-box-setup.

$70 per interceptor, separator, or catch basin. It can be used for building the proper pitch into a plumbing drainage system in a bathroom, kitchen, or even outdoors for rain water drainage. The May 25, 2023 · Fittings and valves add 50% to your total length, but this could vary based on design. 3(3) ]. ) Per Fixture Group; Section 890. 550 464550 Since the possibility of all the fixtures are used and drained simultaneously is very low, Example - Required Water Supply. A floor drain itself does not add hydraulic load. TABLE E Drainage Fixture Units (D. Next Page. 5 1. The volume of the interceptor shall be determined by using Table 1014. 1 DFU ≈ (approximately) 7. 2 Intermittent Flow. S. 525 2 1/2 4 30 35 3537. 150. 1) Except as provided in Sentences (2), (3), (4) and (5) and in Article 2. One WFSU for a singel unit corresponds to one GPM, or. a) all the trays or compartments of a 2- or 3-compartment sink, b) a 2-compartment laundry tray, or. 709. html Visit our website today to learn more about plumbing, house framing and building design. It also provides the drainage fixture unit values for 702. TABLE I Allowed Distance from Fixture Trap to Vent; Section 890. There is no value for assembly use because it would not apply A building drainage system installed in the ground shall be of cast iron, copper Type "K", or non-metallic Schedule 40 or heavier. This concept was first used in the 1920s to normalize the loads that different fixtures would have on a plumbing system. 1 or for rating of devices with intermittent flows. 5 (Step #1) to determine number of fixture units Then use Table 3. value for a similar listed fixture. BSC. 1 and Section 11. 0052 (1/16-inch-per-foot Previous Page. 300 G. Understanding the calculation of fixture units can ensure proper drainage and prevent plumbing issues in the future. The listed drainage fixture unit values in Table C 303. Drainage Fixture Calculator. 5 gallons per flush, and flushes in 5 to 10 seconds. Interceptor Sizing Based on Drainage Fixture Units Fixture Outlet or Trap Size (Inch) Drainage Fixture-unit value GPM Equivalent PDI Size Grease Interceptor 1 1/4 1 7. SFM. A straight forward, concise, and comprehensive resource. For dwelling units, sleeping units, Group I-2 care rooms and Group I-3 prisons, the requirement is one fixture per unit/room/cell. Where discharges to a waste receptor or to a drainage system are only known in gallons per minute (liters per second) values, the drainage fixture unit values for those flows shall be computed on the basis that 1 gallon per minute (0. This drain pipe slope calculator will calculate the required minimum slope, grade, and total drop (fall) of a drainage pipe over a specified length of pipe. Maximum flow – Maximum flow or maximum possible flow is the flow that will occur if the outlets on all fixtures are opened simultaneously. c. A typical shower produces a flow of 5 gpm (7200 gpd) for 5 to 10 minutes. Pipe sizes shall be determined from Tables 11. SPS 382. If the fixture is not known or listed, use the “Other Contributors” column to determine DFU value based on trap size Step 3. Drainage pipe effluent is frequently analyzed to determine the water composition to address nutrient or contaminant transport. P. These calculations are based on the Manning’s Roughness ASAE EP 260. 3 — Procedure For Sizing Grease Interceptor STEPS FORMULA Determine cubic content of fixture by multiplying length x width x depth. 70. 1 Maximum fixture units. Our Lunch and Learn program is designed to qualify for 1. 3 Plastic Tubing Drainage Chart and should be used for estimating purposes only. We start our calculation using following four steps: (1) Estimating Demand (Water Supply Fixture Units) - WSFU. /person hour for each horsepower rating of the Calculate expected volume flow load in sanitary drainage systems. See full list on willplumb. Engineering Pro Guides - Mechanical and Electrical Resources. for each additional full bath. Existing Drain and Sewer Installation. After calculating the total fi xture unit load, the drain line is sized using Tables 82. Sanitary drain pipe sizes shall not be reduced in the direction of flow. Sump/Sewage/Grinder GPM Calculation Worksheet Use the tables below to calculate GPM required. When determining the necessary capacity of a drainage or sewer system, it is vital to know the flow of material that is going to be traveling through it. The use of such fixture units can be applied to a single basic probability curve (or table), found in the various sizing methods [Table E103. 10 for each public use, and 6 for each private use. The fixture units are then converted into gallons per minute (L/m) flow rate for estimating demand. Slope Carrying capacities of sewer and wastewater pipes - gpm and liter per second. Enter the Diameter of the pipe (inches): Enter the Grade (%): %. You can only enter each occupancy once. Building water distribution system only, no drainage The use of such fixture units can be applied to a single basic probability curve (or table), found in the various sizing methods [ Table E103. Table 7-2 lists 30 different plumbing fixtures along with their minimum required trap and trap arm sizes in millimeters. Water Supply Fixture Units - WSFU. 1/2. 3 also establishes the minimum pipe size of a given fixture branch. = 231 cubic inches. Table E) designate the relative load of different kinds of fixtures that shall be used to calculate the total load carried by a soil or waste pipe, and shall be used with the tables of sizes for soil, waste and drain pipes for which the permissible load is given in terms of DFUs. Divide the drainage fixture unit rating by 2 to get the gallons per minute of flow for your device or system. Storm and combined house drains and house sewers shall comply with Sections § 18-29-1106 and § 18-29-1108 of NYC 1938 Code > 15 Plumbing and Gas Piping > 9 Drainage and Venting of Plumbing Systems > §C26-1291. 80. Fixture units are a standardized measure used to determine the load that a plumbing fixture places on a drainage system. Backward. 06 L/s) of flow is equivalent to one A measure of the probable discharge into the drainage system by various types of plumbing fixtures. Gravity Grease Interceptor Sizing Calculation Sheet. water pipe sizing. Such device significantly reduces water consumption and can be easily and quickly changed into a shower, sink or bidet. The theoretical total load for a sanitary drainage system can be calculated by adding loads for every fixture in the system. 9 SIZE OF GREASE INTERCEPTOR ONE-MINUTE DRAINAGE (gpm) - 44. Sewer Pipes - Capacities vs. The maximum number of fixture units that may be connected to a given size of house drain, horizontal branch, or vertical soil or waste stack is given in Tables § 18-29-710A and § 18-29-710B. If the fixture is known, use “Fixture” column to determine DFU value. Table 1 lists the DFU and DF for different building drain sizes and slopes. Intermittent flows derive from fixtures discharging into the drainage system that Drainage fixture unit values as given in Table 709. Table Al . For fixtures with hot and cold supplies, the notes at the bottom of UPC, Table 610. Drainage Fixtures Unit (DFU) Values DFU is a measure of the probable discharge into the drainage system by various type of plumbing fixtures. 90. Alabama Plumbing Code 2021 > 7 Sanitary Drainage > 709 Fixture Units > 709. Drain Fixture Unit, or DFU, is a plumbing design factor, or a relative measure of the drain wastewater flow or load for various plumbing fixtures. The fixture unit values were designed for application in conjunction with the probability of simultaneous use of fixtures to establish the maximum permissible drainage loads expressed in fixture units rather than in gallons per minute of drainage flow. For a water supply system the summarized theoretical water flow for all fixtures is 10 l/s. 1(1) and Table 710. When it comes to plumbing for a kitchen sink, determining the correct fixture units is crucial. TABLE J Size of Vent Stacks Jan 5, 2016 · Using these charts, there are four steps to accurately size uniform, acceptable and easily built drainage and venting systems in buildings: Add up the total number of drainage fixture units (dfu) for each sanitary branch. 5 = 63. In this v First, insert the number of each type of fixture on your premises under the column headed “Quantity”. Note that this conversion is only true for one or a few fixtures. Drainage fixture unit values for continuous and semicontinuous flow into a drainage system shall be computed on the basis that 1 gpm (0. 11. 2008 •. 2. Fixture Unit Table for Determining Water Pipe & Meter Sizes. The fixture unit rating takes into account the likely Jun 19, 2023 · Drainage Fixture Units (DFU) is a measurement used to calculate the drainage load of various plumbing fixtures within a building. C. able 1 and Table 2. This calculator is essential for designing and planning plumbing systems in residential, commercial, and industrial buildings. 1. DFU (Drainage Fixture Unit) is a measurement used to determine the drainage capacity of various plumbing fixtures. Loading Preview. Determine capacity in gallons. c) See Section 709. Drainage fixture unit values as given in Table 709. 702. ): Estimate the supply demand by totaling the fixture units from the Water Customer Demand Data Table – Fixture Unit Count and then by reading the corresponding ordinate from chart below. View PDF. It is important to understand the DFU count when designing or evaluating plumbing systems, especially in kitchen sink installations. Drainage fixture units (DFUs) (see Appendix A. 1330 Drainage Fixture Units (DFUs) a) Values for Fixtures. The Water Supply Fixture Units Calculator is a useful tool for calculating the total water supply fixture units (WSFU) in a building based on the number and type of plumbing fixtures. The fixture unit value takes into consideration the average rate of discharge, duration of use for a single operation and the interval between each operation of a plumbing fixture. The drainage fixture-unit value for a particular fixture depends on its volume rate of drainage discharge, on the time duration of a single drainage operation and on the average time between successive operations. CALCULATING THE ESTIMATED WATER FLOW DEMAND IN GALLONS PER MINUTE (G. f. Existing drain, waste, vent and sewer may be used in Wednesday, June 20, 2018. , urinals, water closets, hose bibs, etc. Step 1: Determine the total number of Drainage Fixture Units (DFUs) for the Food Service Facility. Chart A 103. Table 709. 6 meters from the water source to the most remote fixture. 5 or more. Equipment that discharges either continuously or semicontinuously, such as pumps and ejectors, is assigned two fixture units for each gallon per minute (gpm The water supply fixture unit method shall be used to determine peak input flow in gallons per minute; only the fixtures that drain to the sump shall be included. CHAPTER 7 - SANITARY DRAINAGE. The conversion can only be used for one or a few fixtures. e. It will be assigned a fixture unit value of four water supply fixture units in private use and four WSFU in public use. 0. The total effluent volume must be known in order to determine the tota Download Free PDF. , every fixture shall be protected by a separate trap. 1B on the basis of the drainage fixture unit load (DFU) computed from Table 11. com A Drainage Fixture Unit (DFU) is a unit of measure for the load-producing effects on a plumbing system from different kinds of plumbing fixtures. Three Bedroom Units - 5 people/apt. Intermittent flows differ from continuous flows. 20. pdf), Text File (. 2) One trap may protect. Add 2 d. Drains shall be installed on a continuous bed of undisturbed earth or granular fill so as to support the pipe and fittings. 5. Based on the diagram above the expected total water flow in the system will be aprox. Calculate the discharge length from the open end of a partially filled horizontal pipe. 6 (Step #2) to convert Fixture Units to GPM Enter the GPM in the GPM box under "Design Flow Rate" on the Pump Design Guide. Feb 3, 2016 · A fixture unit is a measure of potential flow and pipe sizing is still subject to probability. Read chart vertically until you intersect the correct curve, then read the chart horinzontally … Continue reading Fixture Counts Appendix A Sizing Storm Drain Systems Appendix B Sizing the Building Water Supply and Distribution Piping Systems Appendix C Conversions: Metric to U. 75 people/apt. Fixture units are a measurement used in plumbing to determine the flow rates and drainage capacities of different fixtures within a building or property. CALIFORNIA PLUMBING CODE - MATRIX ADOPTION TABLE. Although the designs differ in separation First, insert the number of each type of fixture on your premises under the column headed “Quantity”. 115, plus 10 for each public use additional fixture in excess of 5, and 111, plus 6 for each private use additional Section 890. 4. 2. The IPC provides tables to determine fixture units and the corresponding pipe size. F. A kitchen sink typically has a DFU rating of 2, meaning it can effectively drain 2 units of water flow. 3(3)]. 48 gpm and dividing by the flow capacity of the drain using Manning’s formula where n = 0. com/plumbing/index. Volume of partly filled horizontal or sloped cylindrical tanks or pipes - online calculator. It is used in conjunction with other factors, and there are fixture units assigned for both water supply and drainage. ) Adopting Agency. 9 3 2 50 TWO-MINUTE DRAINAGE PERIOD (gpm) - 22. For example, a clothes washer will have a minimum fixture branch pipe size of ½-inch. Just a heads up, this page contains affiliate The Water Supply Fixture Unit - WFSU - is defined by the American Uniform Plumbing Code (UPC) and is used to calculate the demand in water supply systems. Explore a searchable database of US construction and building code. Drainage fixture units for intermittent flow into the drainage system shall be computed on the rated discharge capacity in gallons per minute (gpm) (L/s) in accordance with Table 702. Use Table 3. It helps in determining the pipe sizes, venting requirements, and overall plumbing system design. 3 Conversion of GPM Flow to DFU Values. Values for Fixtures. 100. This unit is assigned by the plumbing code and uses an average flow rate for that fixture. 4. Last GHD | Report for Australian Building Code Board - Fixture Unit Rating Systems, 23/15402 | i June 2015. 1(2) of sizes for soil, waste and vent pipes for which the permissible load is Drainage fixture unit values as given in Table 709. 1 WSFU = 1 GPM. 1(2) of sizes for soil, waste and vent pipes for which Chapter 7 Sanitary Drainage. 4 l/s. 30-3. u. Third, post the result in the “Total column”. Scribd is the world's largest social reading and publishing site. Where fixtures within bathrooms connect to different branches of the drainage system, the fixture unit values for the individual fixtures shall be used, as listed in Table 702. "The technical study guide [textbook] was absolutely amazing! If you complete the entire technical study guide diligently, I have no doubt you will be very prepared for the . 1 Values for fixtures. The items being washed displace about 25% of Estimating Water Flow in Drainage Pipes. Each fixture in the facility has a drainage fixture unit. realistic - or expected Section 890. 18-29-709. TABLE G Building Drains; Section 890. 3 reflect a load of entire bathroom groups on the sanitary drainage system. Fixture Units in Accumulative Values (1) 1. 6 meters x 1. Figure 2: Calculating Fixture Discharge Rates 3 The drainage fi xture unit values for all fi xtures and receptors discharging to a drain line are combined to assess the dfu load of that drain. Feb 6, 2003 · The sizing of drainage piping systems is based on fixture unit values. 3, permits using 75% of the total supply fixture units to calculate flow. Boilers Full Line - 60 G. Oregon Plumbing Code 2021>10 Traps and Interceptors>1014. 0 Grease Interceptors>1014. (2) Calculating Pipe Sizes for the whole building (Cold and Hot Water System) (3) Calculating Pipe Sizes for the whole building (Cold and Hot Water System) (4) Calculating Friction Pressure Drops or losses in Cold and Hot Water Pipes. First § 18-29-710. 1(1) and 710. Due to intermittent use of the fixtures - this method in general adds up to unrealistic high values for the main drainage lines. Go To Full Code Chapter. Meter and street service lines (inches) Building supply and branch lines (inches) Length of pipe (feet) 3/4 1/2 6 3/4 20 1 39 Maximum Water Supply Fixture Units (WSFU) In the bathroom group, how many drainage fixture units do you have? Table P3004 calculates the load on DWV-system piping in terms of drainage fixture unit (d. Per EPAct92, toilets are limited to 1. 25 gallons of water per Hot Only - 25 G. 3. d) Trap size shall be consistent with the fixture outlet size. Sep 27, 2010 · Prima-Restaurant-Equipment has both 15 GPM (GI-30) and 20 GPM (GI-40) Grease Traps. 9 meters of total developed length. Where used as a receptor, the fixture unit value of the fixture discharging into the receptor shall be applicable. Importance of such device continuously rises as some regions and cities face water shortages. Drain Pipes and Vent Stacks Drain pipes and vent stack sizing. 1A and 11. Drainage Fixture Units (DFU) is a unit of measure used in plumbing engineering to determine the drainage load that various plumbing fixtures contribute to a drainage system. 1 specifies the drainage fixture unit values for different types of fixtures. 1 l/s. Helping thousands of engineers pass their exams. Apartments Beauty Shops One Bedroom Units - 1. Revised National Plumbing Code of the Philippines Table 7-2 - Free download as Excel Spreadsheet (. 60. txt) or read online for free. Draining Systems - Main Vents Vents in draining systems protects traps against pressure differences that could cause them to siphon or blow out . U. Where drainage fixture units (DFUs) are not known, the interceptor shall be sized based on the maximum BS STANDARD- DRAINAGE FIXTURE UNITS & FLOW RATE CALCULATION. 9 3 2 49. Let us know your area of interest and the appropriate ParkUSA subject matter expert will come to your office, providing lunch, and spend 30 to 45 minutes sharing their knowledge, expertise and experiences with your team. Fixture - A fixture is any device for the distribution and use of water in a building. https://www. Oct 26, 2023 · The method used to size drain pipes serving several fixtures is similar to the method used for. Size Drainage Fixture Units (DFU) connected to Drainage (dfu). 47 liters/second. Drainage Fixture Calculator - Free download as Excel Spreadsheet (. (Matrix Adoption Tables are non-regulatory, intended only as an aid to the code user. . 15. Kitchen sink fixture units refer to the specific calculation used to determine the impact of a kitchen sink on the overall plumbing system. 2 for methods of computing unit value of fixtures not listed in Table 709. 5 1 25 Note 51 to 150 drainage fixture units, $350; 151 to 249 drainage fixture units, $500; 250 or more drainage fixture units, $3 per drainage fixture unit to a maximum or $4,000; and. Assembly applies to plumbing fixtures in types of occupancies indicated as A-1 through A-5 in Chapter 4, Table 422. Where discharges to a waste receptor or to a drainage system are only known in gallons per minute (liters per second) values, the drainage fixture unit values for This appendix provides a general procedure for sizing a water supply system. Determine actual drainage load. Example 1 Water cooler. 5 gpm. The third standard sizing method is based upon determined drainage fixture units (DFU). 30 Note Note: When converting water fixture units to gallons per minute it is permissible to calculate the load as a supply system with predominantly flush tanks. BSC-CG. A fixture unit should be considered a probability factor since there is no direct correlation A Drainage Fixture Unit (DFU) is a unit of measure for the load-producing effects on a plumbing system from different kinds of plumbing fixtures. b. Second, multiply the quantity by the number of fixture units given under either column “Private Use” or “Public Use”, whichever is applicable. Sanitary Piping - Drainage Fixtures Unit Loads Maximum Drainage Fixture Unit - DFU - loads in sanitary piping systems. Drain Pipes and Vent Stacks n the IPC and applying the above method, we can make two tables as shown in. Calculate the size of the main building drain using the total of Calculator is for a single story; The required number of fixtures for each occupancy is summed and then rounded up to give the total requirement. Oct 18, 2017 · For fixtures with cold-water supply only (i. May 12, 2023 · III. Determining Fixture Units and Pipe Size. 1. Consult a Water Table Management Professional for design criteria information. pdf - Free download as PDF File (. ), this will be equal to the total water supply fixture-unit value from Table 610. Here are two quantitaive measures of DFUs: 1 DFU = 1 cubic foot of water drained through a 1 1/4" diameter pipe in one minute. 79 liter/min. $150. 1(2) of sizes for soil, waste and vent pipes for which the permissible load is May 5, 2008 · The common sizes available today are 10, 15, 20, 25, 35, 50, 75 and 100 gpm. DF is calculated by multiplying the DFU by 7. 48 US GPM or ≈ 0. It is a unit of measure used to evaluate the demand that a particular plumbing fixture, or group of fixtures, will put on the plumbing system. 3 Gravity Grease Interceptors>1014. Apr 24, 2017 · Table 610. Michael Aide. 105. 1 in = 25. 6 Sizing Criteria. Code regulations are consolidated by state and DFU - Drainage Fixture Units DFU are used to calculate the drainage flow from fixtures and the required capacities of sewer service systems. TABLE F Fixtures Not Listed in Table E; Section 890. 2(a) or 919. IV. Determine the sanitary branch sizes using the dfu values. Column 3. 06 L/s) of flow is equivalent to two fixture units. Pipes and Equipment - Identification Labels Tags and label colors used for mechanical, plumbing and piping systems. 06 L/s) of flow is equivalent to two drainage fixture units. /person Steam boilerts require 4. 1 of this code. 2(b). Example: shower, urinal, fountain, shower, sink, water faucet, tap, hose bibs, hydrant etc. Meter & Street Service (inches) Building Supply & Branches (inches) Maximum Allowable Length (feet) 40. 1(1) and the enlarged scale Chart A 103. The calculation would be 140 feet x 1. 1 WSFU = 1 GPM = 3. See Chapter 1 for state agency authority and building applications. (see below) Individual Fixture Units Assigned in Decreasing Values. 4 mm. 2 (2). 5. /station full line Two Bedroom Units - 3 people/apt. Jan 25, 2017 · Total load from all fixtures that discharge into the grease trap FIXTURES Compartment size 24 inches x 24 inches x 12 inches Additional fixture 1 Additional fixture 2 - COMPARTMENTS - 2 - - - Load (gallons) - 44. DFU - Drainage Fixture Units DFU are used to calculate the drainage flow from fixtures and the required capacities of sewer service systems. 1 Gal. ) values. 3 Conversion of gpm flow to dfu values. Things like produce prep sinks and hand washing sinks do not need to be connected to the grease device. The fixture is normally filled to about 75% of capacity with water. xlsx), PDF File (. customary Units The drainage fixture unit load of an indirect waste receptor receiving the discharge of indirectly connected fixtures shall be the sum of the drainage fixture unit values of the fixtures that discharge to the receptor, but not less than the drainage fixture unit value given for the indirect waste receptor in Table P-919. 30-2 and 82. = Definition. TABLE H Horizontal Fixture Branches and Stacks; Section 890. 0 Fixture Units Go To Full Code Chapter The following table based upon the rate of discharge from a lavatory as the unit shall be employed to determine fixture equivalents. 6 gallons per flush and showerheads 2. 3 Continuous Flow. 1(2) of sizes for soil, waste and vent pipes for which the permissible load is Table of content. 30. In plumbing terms, flow is typically expressed in gallons per minute. ply Fixture Units” on page 6. Building sewer service only. These units are then used in conjunction with Table 710. 1(2) of sizes for soil, waste and vent pipes for which the permissible load is Nov 15, 2010 · A low-flow water closet uses 3. 5 = 210 feet, or 42. 40. The largest fixture in the system requires 0. Drains and Sewers - Capacities vs. Sanitary Drainage Systems - Volume Flow Calculate expected volume flow load in sanitary drainage systems. 3 of the UPC. 5 10 1 1/2 2 15 15 2322. homebuildingandrepairs. EXCEPTION: Drain pipe sizes for individual fixtures shall be not For SI: 1 inch = 25. Since most plumbing b) A showerhead over a bathtub or whirlpool bathtub attachments does not increase the drainage fixture unit value. Understanding Drainage Fixture Units (DFU) The paper deals with nozzle valve characteristics used in modern portable device, named handy shower, dedicated for personal hygiene. It involves assigning a drainage fixture unit (DFU) value to each fixture type and its use. M. 1 designate the relative load weight of different kinds of fixtures that shall be employed in estimating the total load carried by a soil or waste pipe, and shall be used in connection with Tables 710. Because of the variable conditions encountered, it is impractical to lay down definite detailed rules of procedure for determining the sizes of water supply pipes in an appendix, which shall necessarily be limited in length. 1(2) to determine the pipe size needed. Common sizes available today are 300, 500, 750, 1,000, 1,250, 1,500, 2,000 and 3,000 gallons. For a continuous flow into a drainage system, such as from a pump, sump ejector, air conditioning equipment, or similar device, 2 fixture units shall be equal to each gallon per minute (gpm) (L/s) of flow. 0 Professional Development Hour for Professional Engineers. 1(2) are used to convert fixture units to water supply demand in gallons per minute (gpm) for either a flush tank water closet system or flushometer valve system. If they are not plumbed into the device then they should not be included in the sizing calculation. Traps for Sanitary Drainage Systems. xls / . Building water service only. Since all fixtures in a system are never used at the same time, the total units achieved by adding the numbers for all fixtures must be compensated for their intermittent use. assess the consequences of having less water in the systems to the pipework and drainage systems; identify the optimum volume of water demand to support the operation of each fixture and effectively drain solid through the system; and. 1 Selecting the Size of Drain Piping. For a fixture not listed, use the highest d. This numerical factor measures the load-producing effect of a single plumbing fixture of a given kind. In the example here there is a total of 140 feet or 42. The gravity grease interceptor size nomenclature is in gallons, based on the actual volume of water the interceptor will hold. 3. DFU are used to calculate the drainage flow from fixtures and the required capacities of sewer service systems. Where discharges to a waste receptor or to a drainage system are only known in gallons per minute (liters per second) values, the drainage fixture unit values for those flows shall be computed on the basis that 1 gpm (0. To calculate the total DFU for a functioning kitchen sink, take into account other fixtures sharing the same drain line. Size Drainage Fixture Units (DFU) connected to building drains and sewers. 013, S = 0. 6. D. Cast Iron Soil Pipes - Dimensions Dimensions of cast iron soil pipes. A measure of the probable discharge into the drainage system by various types of plumbing fixtures. gk gk rv eb rt oq ou bl tl ok