What do plumbing estimating services include?
Plumbing estimating services measure fixtures, drainage and domestic water piping from the drawings, apply fitting allowances and labor rates, and return an Excel workbook and PDF summary with marked-up pages. Each line shows its unit, measurement rule and data source so you can check the arithmetic.
Our Professional Plumbing Estimating Services
Plumbing pricing fails in two places: the fixture schedule is counted but the branch lines behind it are not, and the pipe is counted without the fittings, hangers and sleeves that make it installable. We measure Division 22 work from the drawings, apply a stated measurement rule to each system, and show the arithmetic on the sheet so you can audit any line back to a drawing sheet and a detail.
Every takeoff starts from the riser diagram and the plumbing fixture schedule. Each fixture is tagged with its drainage fixture units and water supply fixture units, and each run is measured along its developed length rather than the straight-line distance on plan. That rule matters on a bathroom group where a 3 in. waste line drops through a chase: the vertical leg, the offsets and the fitting allowance all enter the quantity.
The same discipline carries into our MEP scope coordination, where the plumbing work is reconciled with mechanical and electrical before the numbers are rolled up. Contractors who need the full package can submit drawings for a multi-trade review and receive one workbook covering every division in scope.
Plumbing material takeoffs
We count pipe by material and size — cast iron, no-hub, PVC, copper tubing, PEX — in linear feet, separated by below-slab, in-wall and above-ceiling locations. Fittings are itemized by type and size, with a stated fitting allowance where the drawings do not dimension every bend. Hangers and supports are taken off by spacing rule and converted to pieces, and insulation is measured by pipe length and size. The deliverable is an Excel workbook with each item tied to a drawing reference, the format most teams expect from plumbing material takeoff Excel deliverables.
Plumbing labor cost estimates
Our plumbing labor estimating services convert quantities into hours using crew-based production rates, then price those hours with published U.S. wage data for plumbers, pipefitters and steamfitters. We separate rough-in from fixture set and trim, because a water closet set is a different labor unit than the branch line feeding it. Excavation and backfill for the water service line and building sewer are listed as their own line items rather than buried in a pipe rate.
Bid-ready plumbing cost estimates
The bid-ready package rolls material, labor, equipment and subcontractor quotes into a single plumbing bid estimate with a summary page a chief estimator can read in two minutes. Each line shows quantity, unit, unit cost, extended cost and the source of the rate. You receive the Excel workbook, a PDF summary and marked-up drawing pages showing where each quantity came from. Teams that also carry site utilities or process piping can pair these plumbing estimating services with a separate piping takeoff so the two scopes do not double-count shared trench and support costs.
What Is Included in Our Plumbing Estimates?
A plumbing estimate is only as good as its scope statement. We list what is measured, what is excluded and which drawing set the quantities came from, so a gap in the documents shows up as a listed exclusion instead of a surprise after award. Our plumbing estimating services cover Division 22 from the water service to the last fixture trim, and we coordinate the fixture and equipment counts with the mechanical estimating services scope so shared equipment is not counted twice.
| Measured item | Unit | Measurement rule |
|---|---|---|
| Sanitary and vent piping | Linear feet | Developed length by material and size, split by below-slab, in-wall and overhead |
| Domestic water piping | Linear feet | Developed length from supply main to fixture stop, risers measured full height |
| Fittings | Each | Counted from the isometric drawing, plus a stated fitting allowance |
| Plumbing fixtures | Each | Fixture schedule count by type and floor, with fixture units totaled |
| Hangers and supports | Each | Count from the hanger spacing rule for the pipe size and material |
| Pipe insulation | Linear feet | Measured by pipe length and size, with fittings left uninsulated unless noted |
| Trench excavation and backfill | Cubic yards | Trench width times depth times run length |
| Water heaters and specialties | Each | Counted from the schedule with connection sizes noted |
Fixtures, DWV, domestic water and site utilities
The measured scope includes:
- Plumbing fixtures from the fixture schedule — water closets, lavatories, sinks, urinals, service sinks, floor drains, floor sinks and cleanouts
- Drainage, waste and vent piping, including soil stacks, vent stacks, waste lines, branch lines and P-traps
- Domestic water piping from the supply main through risers and branches, plus the water heater and its connections
- Water service line, building sewer, penetration sleeves and fire-rated penetration seals
- Hangers and supports, pipe insulation, and excavation and backfill for buried lines
- Roof drains, leaders and storm piping where the plumbing scope carries them
Fixture units, linear feet and fitting counts
Quantities are reported in the unit that matches the trade's ordering practice:
- Fixture count takeoff by type and by floor, with drainage fixture units and water supply fixture units totaled per riser
- Pipe in linear feet by material, size and location, measured along developed length
- Fittings counted by type and size, with a stated fitting allowance for undimensioned bends
- Hangers and supports by count from the spacing rule, insulation by pipe length and size
- Excavation and backfill in cubic yards from trench width, depth and run length
- Water heaters, pumps and specialties counted each, with the connection sizes noted
Materials, labor, equipment and cost breakdowns
Costs are broken out so you can see where the money sits:
- Material at unit cost per foot, per fitting or per fixture, extended to the quantity
- Labor in hours by crew and task, priced from published wage data and reviewed by an estimator
- Equipment such as trenchers, pipe cutters and lifts, carried as its own line
- Subcontractor quotes shown as received, with the scope each quote covers
- Sales tax, permits and general conditions listed separately rather than absorbed into unit rates
Pipe and metal prices move. The public price index data on this page shows the direction of copper, steel and plastic construction products, and we note which material lines carry the most price exposure. Every plumbing estimating services deliverable states the unit, the measurement rule and the source of the unit cost, so a reviewer can retrace any line back to the drawing and the price data.
Who Needs Our Plumbing Estimating Services?
Different readers use the same takeoff for different decisions. A plumbing contractor needs order quantities and hours; a general contractor needs a scope-complete number to compare against bids; a developer needs a cost per fixture to test a pro forma. We format the output so each reader can pull what they need without rebuilding the sheet.
Plumbing and mechanical subcontractors
A plumbing subcontractor bidding three projects in the same week needs the plumbing quantity takeoff finished before the bid date, not after. We hand back pipe lengths by material and size, fitting counts and labor hours per fixture so you can compare your own production history against our rates. Where the drawings show cast iron pipe below slab and PVC above, the takeoff keeps those lines separate because the labor and material rates differ. Subcontractors who also carry HVAC scope pair these plumbing estimating services with our mechanical system takeoffs so both trades price off one drawing set.
General contractors and home builders
General contractors use the estimate to check that each plumbing bid covers the same scope. We reconcile the fixture schedule against the plumbing drawings and flag fixtures shown on one but not the other, which is a common source of change orders on multifamily work. Home builders get a per-fixture cost view they can carry into a model-by-model budget. On projects where plumbing sits inside a larger MEP package, our multi-trade estimating scope keeps Division 22 quantities aligned with the mechanical and electrical sheets.
Developers, architects and suppliers
Developers read water supply fixture units and fixture counts against the building's expected occupancy to sanity-check the design before it is priced. Architects use the marked-up drawings to see which details drove the cost. Suppliers use the material list to prepare quotes on pipe, fittings and fixtures. These plumbing estimating services start with submitting the drawing set for review, and we will confirm the scope before quoting.
Types of Plumbing Projects We Estimate
The measurement rules stay the same across project types; the scope mix changes. A single-family house is mostly small-diameter PEX and PVC with one water heater, while a hospital wing carries medical gas, recirculating hot water and a much denser fixture count takeoff. Our plumbing estimating services state which systems are in scope for each project so the estimate is not compared against a bid that priced a different scope.
Residential projects
Single-family and townhome work is driven by fixture count and the number of wet walls. We measure the water service line, the building sewer, the DWV system and the domestic water distribution, and we separate the water heater and its venting as its own line. Multifamily buildings add riser stacks that repeat floor to floor, so we measure one typical floor and multiply, then adjust the ground floor and roof penetrations separately.
Commercial buildings
Office, retail, restaurant and institutional work brings larger supply mains, grease interceptors, backflow preventers and code-driven venting. We take off copper tubing and cast iron by size and pressure class, and we note where the drawings specify a code family such as the International Plumbing Code or Uniform Plumbing Code so you can confirm the edition with the building department. Restrooms repeat, so fixture groups are priced once and extended by count.
Industrial and infrastructure projects
Industrial plumbing adds process piping, floor drains in equipment rooms, interceptors and larger-diameter buried lines with engineered bedding. We measure excavation and backfill separately from the pipe, and we carry valves, specialties and supports as itemized lines. For the wider building scope around the plumbing, see our full building cost estimate service.
Our Plumbing Estimating Process
The process starts with the drawing set. Send the plumbing sheets, the riser diagram or isometric drawings, the plumbing fixture schedule, the general notes and the Division 22 specification sections. We also ask for the architectural floor plans, because fixture locations and floor drain placement are read off them, and any civil or site plan that shows the water service line and the building sewer. Missing sheets become a stated assumption on the cover page rather than a silent gap in the numbers.
Every takeoff runs from the drawing to the quantity to the cost line, and each step is checked before the next begins.
Submit drawings and specifications
We log the sheet list, revision dates and addenda first, then confirm the code basis noted on the drawings, since the edition of the International Plumbing Code or Uniform Plumbing Code adopted locally changes fixture unit values and vent requirements. You tell us the project location, the bid date and the scope you want priced, from underground only through the full Divisions 22 and 23 package. If you are assembling a combined package, the same intake feeds our MEP takeoff and estimating work, so the plumbing and mechanical scopes are counted from one drawing set. Where the package includes air-side equipment, the same intake also supports hvac estimates priced from the equipment schedules.
Plan review and digital takeoff
An estimator opens the PDFs on screen and scales each plumbing plan, then traces the domestic water mains, branches and risers, and the sanitary and vent routing, recording developed length by pipe size and material. The dwv piping takeoff is separated into soil stacks, waste lines, branch lines and vent stacks, with fittings, no-hub couplings and hangers counted from the riser diagram rather than estimated as a percentage. Fixtures come off the schedule one for one, and each floor drain, cleanout and p-trap is located on the plan and marked on the takeoff sheet. PEX piping, copper tubing, cast iron pipe and PVC pipe are kept on separate lines because their labor units and material prices differ.
Cost calculation, quality checks and delivery
Quantities are priced with national average unit costs adjusted by the published wage and price data described below, and an estimator reviews the extension on every line. A second pass checks fixture counts against the schedule, compares pipe footage against the riser diagram, and tests the excavation and backfill allowance for the water service and building sewer. You receive an Excel workbook, a PDF summary and marked-up drawing pages showing where each quantity was measured, so any line can be traced back to a sheet and a scale. The fee is quoted per project after we review the plans; upload your drawing set and we will confirm scope and price before any work starts.
Sample Plumbing Estimate and Deliverables
The illustrative example below prices a small two-story office tenant fit-out with six restrooms, one break room sink and two floor drains. The assumptions are stated so you can see how the numbers move: 24 water closets, 14 lavatories, 2 service sinks, 2 floor drains, roughly 1,850 linear feet of combined domestic water and sanitary piping, and a 1.5-inch water service entering the building. Unit costs are illustrative ranges for a mid-size U.S. metro and are not a quote for your project.
Each deliverable answers a different question. The Excel sheet shows what was counted, the marked-up drawings show where, and the cost file shows what it adds up to.
| Item | Qty | Unit | Unit cost range | Extended range |
|---|---|---|---|---|
| Water closets, floor-mounted, complete with flush valve and stop | 24 | EA | $520 – $640 | $12,480 – $15,360 |
| Lavatories with faucet, P-trap and supply stops | 14 | EA | $310 – $390 | $4,340 – $5,460 |
| Service sinks with faucet and P-trap | 2 | EA | $780 – $950 | $1,560 – $1,900 |
| Floor drains with trap primer | 2 | EA | $420 – $520 | $840 – $1,040 |
| Domestic water piping, 1/2 in. to 1-1/2 in., material and labor | 1,050 | LF | $11.00 – $15.00 | $11,550 – $15,750 |
| Sanitary and vent piping, 1-1/2 in. to 4 in., material and labor | 800 | LF | $16.00 – $22.00 | $12,800 – $17,600 |
| Cleanouts, 3 in. and 4 in., with cover | 8 | EA | $180 – $240 | $1,440 – $1,920 |
| Water service line, 1-1/2 in., including excavation and backfill | 90 | LF | $38.00 – $52.00 | $3,420 – $4,680 |
| Subtotal, direct cost | — | — | — | $48,430 – $63,710 |
Excel quantity takeoff sheet
One tab per system, each row carrying a CSI MasterFormat Division 22 line number, description, quantity, unit of measure and the measurement rule used. The domestic water piping estimate is broken out by size and material, the sanitary piping by soil stack, waste line and branch, and fixtures by type with their drainage fixture units and water supply fixture units recorded beside them. A summary tab rolls the detail into the cost file, and a plumbing material takeoff excel export lets your purchasing team sort by material, such as cast iron pipe, PVC pipe or copper tubing, and by size.
Marked-up drawings
The same PDFs you sent come back with each measured run highlighted by size and material, fixture tags keyed to the takeoff sheet, and cleanout and floor drain locations circled. Where a run was scaled from a plan rather than dimensioned, the measured length is written on the markup so you can check it against the drawing. Where the riser diagram and the plan disagree, the discrepancy is flagged on the sheet instead of being quietly resolved.
Itemized cost estimate
The cost file separates material, labor, equipment and subcontractor lines, with labor hours shown per fixture and per linear foot so the crew loading can be checked against your own production rates. Sales tax, permits, general conditions and overhead and profit are listed as separate lines rather than buried in unit prices. Every extension is rounded to the cent and the subtotal is tested against the line items. If the scope includes gas piping or hydronic work, our piping system takeoff and pricing covers those systems on the same basis.
Software and Pricing Data We Use
Two things drive the accuracy of a plumbing cost estimate: how the quantities were measured and what unit costs were applied to them. We keep those separate so you can audit either one.
Takeoff and estimating software
Takeoff is done on screen from the PDF drawing set using on-screen takeoff tools with calibrated scales, so a measured length carries the scale it was drawn at. Quantities flow into a spreadsheet estimating workbook rather than being retyped, which removes the transcription errors that show up between a paper takeoff and a cost file. Cost databases and published unit-cost references supply the starting unit prices for each line, including fittings, a no-hub coupling count per joint, hangers and supports, insulation and penetration sleeves. The plumbing material takeoff excel output is generated from that same workbook, so the sheet you receive and the cost file cannot drift apart.
Regional material and labor pricing method
Material prices start from national averages and are adjusted with the U.S. Bureau of Labor Statistics Producer Price Index series for the materials in this scope, including copper, steel and plastic construction products. The chart below tracks those series rebased to 100, so you can see how each material has moved over the period shown. Labor starts from the BLS wage data for plumbers, pipefitters and steamfitters in the wage table below, then is adjusted for the project's location, any prevailing wage or Davis-Bacon requirement, shift work, occupied-building conditions, and the height and access of the vent stack and supply main runs. The result is reviewed by an estimator against the project's AACE estimate class before delivery. Route the drawing set through our drawing-based quantity takeoff intake and the same priced basis carries into the estimate.
Material price movement, Oct 2023 to Sep 2026
| Occupation | 25th percentile | Median | 75th percentile |
|---|---|---|---|
| Plumbers, pipefitters and steamfitters | $24.13 | $30.67 | $40.92 |
| Construction laborers | $18.57 | $22.66 | $28.72 |
| First-line supervisors, construction trades | $30.48 | $38.42 | $48.78 |
Base wages before payroll taxes, insurance and benefits. Source: BLS Occupational Employment and Wage Statistics, national, all industries.
Why Contractors Choose Our Estimating Services
The reason is the sheet, not the sales pitch. Every line in a plumbing bid estimate shows the quantity, the unit, the measurement rule and the source of the unit cost, so a reviewer can re-add the column and land on the same total we did.
Trade-specific expertise
Plumbing is priced by people who read riser diagrams, not by generalists applying a square-foot rate. A soil stack is counted from the stack through the roof penetration, a supply main is measured from the meter or service entry to the last fixture branch, and hanger and support spacing follows the code and the pipe material rather than a flat allowance. Fixture units, developed length and fitting allowances are handled the way the code and the trade actually apply them, and the assumptions behind each are written down.
Quality control and clear assumptions
Each estimate goes through a second review that re-checks fixture counts against the schedule, pipe footage against the riser diagram, and the arithmetic on every extended line. Items we could not confirm from the drawings, such as the depth of the building sewer or the material of an existing connection, appear as stated assumptions with an allowance attached, not as a hidden contingency. Scope we excluded is listed explicitly, so your bid does not carry a gap you discover after award. The same discipline runs through our whole-project cost estimating when plumbing is one division of a larger package.
Turnaround, communication and revisions
Delivery dates are agreed when we confirm scope, based on the sheet count, the number of systems and the bid date you give us. We do not publish a standard turnaround because a six-sheet restroom renovation and a full high-rise riser package are not the same job. Revisions are handled against the addendum or revision set you send, with changed quantities marked so you can see what moved between issues. Questions during review go to the estimator who built the sheet, and our bid-day estimating support team can align the plumbing numbers with the rest of your bid package.
Plumbing Estimating Services Pricing
The fee for our plumbing estimating services is quoted per project after we review the drawings, not published as a flat rate. We read the sheet count, the number of trades in scope, alternates, addenda and the density of the riser diagrams before we quote, because a fixture count takeoff from a clean plumbing fixture schedule and a full DWV layout from hand-marked isometrics are different jobs.
Every quote is a fixed fee for a defined deliverable: an Excel workbook, a PDF summary and marked-up drawing pages. We do not quote an hourly rate against an open-ended scope, and there is no charge for the plan review that precedes the quote.
Pricing inside the estimate follows the same rule as the fee: each line carries a unit, a measurement rule and a source. A plumbing cost estimate per fixture is built from drainage fixture units and water supply fixture units, then priced through the pipe, fittings, hangers and labor that each fixture actually demands.
| Input | What it represents | Unit |
|---|---|---|
| Base wage | Journeyman hourly wage before burden | $ per hour |
| Burden % | Payroll taxes, insurance and fringe as a share of base wage | % of base wage |
| Overtime share | Share of total hours worked at the overtime rate | % of hours |
| Crew size | Plumbers on the crew for the priced activity | number |
| Hours | Straight-time hours planned for the activity | hours |
How quotes are calculated
We start from the drawing set and count what the scope requires: fixtures from the schedule, developed length on each waste line and water service line, fittings and valves, hangers and supports, insulation on domestic hot and cold runs, and excavation and backfill where the building service leaves the structure. Each count becomes a line with a unit and a rule written next to it, so you can check the arithmetic rather than accept a lump sum.
Labor is priced at a loaded rate, not a bare wage. The calculator below takes a base wage, a burden percentage, the share of hours worked at overtime, crew size and hours, and returns the loaded rate, the overtime-blended rate, labor hours and crew labor cost. Use it to test whether the labor hours per fixture in a bid estimate match how your own crew actually runs.
What affects price and delivery time
Scope drives price more than square footage. A tenant fit-out with a dozen floor drains and a single water heater is a smaller takeoff than a multifamily building with repeated wet-wall stacks, even at similar area. Alternates and addenda add a second pass through the sheets, and hand-marked isometrics with missing pipe sizing add review time.
We do not state a delivery time until we have seen the drawings, because the honest answer depends on sheet count and legibility. Send the plumbing sheets, the fixture schedule and any riser diagrams through our plan intake and we will quote the fee against that scope. If your package also carries HVAC and electrical work, our mep estimating services team can quote the divisions together so the plumbing labor hours line up with the rest of the bid.
Loaded labor rate calculator
- Loaded rate
- $41/hr
- Blended with overtime
- $43/hr
- Labor hours
- 320
- Crew labor cost
- $13,912
Burden covers payroll taxes, workers’ compensation, insurance and benefits; it varies by state, trade and company. Overtime is priced at time and a half.
Plumbing Estimating Services Across the US
Plumbing pricing moves by region for reasons that show up in the estimate: wage levels, prevailing wage requirements on public work, freight on cast iron pipe and copper tubing, and the code edition the local building department enforces. A branch line sized under the International Plumbing Code and the same run sized under the Uniform Plumbing Code can land on different pipe sizes and different fitting counts, so we confirm the adopted edition before the takeoff is priced.
Climate changes the scope as well. Freeze protection, insulation thickness on domestic water and the depth of excavation and backfill for the water service line all vary with the market, and each one is a line item rather than an allowance. We serve all states from one team, so the measurement rules and the audit trail stay the same while the wage and material inputs change by location.
Our plumbing estimating services use national average unit costs adjusted with published U.S. wage and price data, then reviewed by an estimator who checks pipe sizing and fixture counts against the drawings. For projects that bundle trades, the same approach carries into our professional construction estimating services.
Frequently Asked Questions
How much does a plumbing estimate cost?
The fee is quoted per project after we review the plans, so it depends on drawing count, fixture count, the number of risers and isometrics, and whether you want material only or material and labor. A small tenant fit-out with one restroom group prices differently from a multifamily building with stacked wet walls. Send the set and we return a written quote before any takeoff starts.
How long does a plumbing takeoff take?
The delivery date is set when we quote, based on sheet count, fixture schedule completeness, and how many piping systems the drawings show. We confirm that date in writing with the fee so you can plan your bid calendar. Incomplete riser diagrams or missing fixture schedules push the date because we have to request clarifications before quantities can be closed.
Do you estimate labor and material costs?
Yes. Every line carries a quantity, a unit, a labor hours figure, and a material unit cost, so the bid estimate separates the two. Labor is built from installed quantities by pipe size and material rather than a single fixture multiplier, and material is priced from current published wage and producer price data and then reviewed by an estimator. You can see which lines drive the total.
What drawings do you need?
Send the plumbing sheets with the fixture schedule, riser diagrams or isometrics, and the floor plans that show fixture locations. The general, structural, and architectural sheets help with slab penetrations, sleeves, and ceiling space. A site or civil sheet is needed for the water service line and sewer lateral. If a sheet is missing, we list it in the clarification log.
Can you use my estimate template?
Send your template along with the plans and we confirm whether the estimate can be delivered in it before the work begins. Most Excel-based templates with a CSI MasterFormat Division 22 structure map cleanly. If your template uses custom cost codes or a proprietary bid recap, we say so in the quote rather than reformatting after delivery.
Do you sign NDAs?
You can request an NDA before sending drawings, and the terms are agreed before plan review begins. Send the document with your first message so the paperwork does not hold up the takeoff. We do not publish a standard form, so the agreement is whatever both parties sign. Drawings are used only to produce your estimate.
What is a fixture count takeoff and why does it matter?
A fixture count takeoff lists every water closet, lavatory, sink, floor drain, water heater, hose bibb, and cleanout by type and location, taken from the plumbing fixture schedule and floor plans. The counts anchor drainage fixture units and water supply fixture units, which drive pipe sizing, and they are the fastest check a reviewer has on whether the estimate covers the whole building.
Do you calculate drainage and water supply fixture units?
Yes. We assign drainage fixture units and water supply fixture units per the plumbing fixture schedule, then carry them through the soil stack, waste line, vent stack, and branch line sizing. Developed length plus fitting allowance sets the supply main and branch sizes. The fixture unit table is included in the workbook so your reviewer can trace every pipe size back to a count.
How do you handle DWV piping takeoff?
We measure horizontal waste and vent runs by pipe size and material from the plan, then add vertical soil and vent stack lengths from the riser diagram, floor to floor. Fittings are counted by type, including no-hub couplings, p-traps, and cleanouts. Hangers and supports are taken off by developed length and spacing rule, and insulation is added where code or spec requires it.
Do you include excavation and backfill for underground plumbing?
Yes, when the scope includes the water service line and sewer lateral. We take off trench length, depth, and width from the site or civil sheet and the plumbing plan, then separate excavation, bedding, backfill, and compaction. Penetration sleeves and firestopping at rated walls are listed as separate lines so nothing hides inside a lump sum.
Can you estimate a plumbing-only package from a full drawing set?
Yes. We isolate CSI MasterFormat Division 22 from the full set and ignore the mechanical, electrical, and fire protection scope unless you ask for it. If you need the adjacent trades, we can price them from the same sheets through our MEP estimating services. The workbook keeps Division 22 as its own tab so your bid recap stays clean.
How do you treat cast iron, copper, PEX, and PVC pricing?
Each material is taken off separately because the labor and fitting rules differ. Cast iron and no-hub couplings price differently from PVC, and copper tubing prices differently from PEX piping, so mixing them into one pipe line hides the real driver. We carry the material per system and note the pricing basis on each line so a substitution can be re-priced quickly.
What does the delivered plumbing material takeoff Excel file contain?
The workbook has a takeoff tab by system, a fixture schedule tab, a fixture unit summary, and a bid recap, plus a PDF summary and marked-up drawing pages showing what was measured. Each line carries a quantity, unit, measurement rule, and source reference. That structure is what makes the plumbing estimating services traceable line by line.
Which code edition do you use for fixture units and pipe sizing?
We follow the code edition named in your project specifications, typically the International Plumbing Code or the Uniform Plumbing Code as adopted locally. Where the two differ on fixture unit values or vent sizing, the adopted edition governs. Confirm the local code edition with the building department before bid, since amendments change sizing and fixture unit tables.