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Residential Plumbing Inspection in Drawings: Each IRC Value and Where to Find It One Inspection Topic per Page

For the ICC residential plumbing inspector exam and the job after it. Underground, rough-in and final, always in the same order. Each topic on its own page: the drawing, the code value and its IRC section. 66 illustrated pages.

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Every topic, its own pageEach code value drawn, with the explanation right beside it
66 illustrated pages8 parts, from the three inspection visits to the final checklist
Up-to-date sourcesIRC Part VII Plumbing (Ch. 25–33) and the ICC Residential Plumbing Inspector (P1) outline, with the IRC section on every page
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Look Inside the Book

Every page has one big drawing and a box with the code values and the IRC section you need to know:

Underground, rough-in, final: the test at each visit and P2503.2's no-cover rule
Underground, rough-in, final: the test at each visit and P2503.2's no-cover rule
Continuous bedding, no rocks, backfill in 6-in tamped layers until 12 in covers the pipe (IRC P2604).
Continuous bedding, no rocks, backfill in 6-in tamped layers until 12 in covers the pipe (IRC P2604).
1/4 in./ft up to 2-1/2 in.; 1/8 in./ft for 3–6 in.; 1/16 in./ft from 8 in. (IRC P3005.3)
1/4 in./ft up to 2-1/2 in.; 1/8 in./ft for 3–6 in.; 1/16 in./ft from 8 in. (IRC P3005.3)
Trap arm max: 5 · 6 · 8 · 12 · 16 ft for 1-1/4 to 4 in traps (Table P3105.1)
Trap arm max: 5 · 6 · 8 · 12 · 16 ft for 1-1/4 to 4 in traps (Table P3105.1)
Lavatory 1, tub 2, kitchen sink 2, 1.6 gpf toilet 3: Table P3004.1 drawn fixture by fixture.
Lavatory 1, tub 2, kitchen sink 2, 1.6 gpf toilet 3: Table P3004.1 drawn fixture by fixture.
80 psi static max · PRV per ASSE 1003 · no general 40 psi minimum in the 2024 IRC
80 psi static max · PRV per ASSE 1003 · no general 40 psi minimum in the 2024 IRC
T&P relief: ≤150 psi, ≥25 psi above system, opens at ≤210°F, sensor in the top 6 in.
T&P relief: ≤150 psi, ≥25 psi above system, opens at ≤210°F, sensor in the top 6 in.
Sanitary tee on its back, low flat vent, long trap arm, no plate, sagging PVC
Sanitary tee on its back, low flat vent, long trap arm, no plate, sagging PVC

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These are real pages from the book. The table of contents is the full one: 8 parts and 62 topics.

The Problem Isn't You. It's How It Was Explained to You.

You're standing over a rough-in with a tape on a 3-inch drain, and the plumber is waiting for your call. Is 1/8 inch per foot enough, or do you write it up?

You've pitched pipe for years. But in the code book, slope is one table among hundreds, and under pressure you can't recall which one or where it is.

1/4 in./ft up to 2-1/2 in.; 1/8 in./ft for 3–6 in.; 1/16 in./ft from 8 in. (IRC P3005.3)

In this book, drain slope is one page: three pipes drawn side by side, each with its fall per foot in a box. 1/4 in. up to 2-1/2 in., 1/8 in. for 3 to 6 in., 1/16 in. from 8 in., with IRC P3005.3 right next to it.

Trap seals, trap arm length, cleanout spacing, the T&P valve and the underground water test work the same way: one topic, one page, one drawing.

You look at the drawing and you know the number and where it sits in the code. You make the call on site without going back to the book.

COMPARE FOR YOURSELF

The Same Topic, Two Ways to Study It

THIS
  • The code book: line after line
  • Bedding and backfill explained only in words
  • You walk into the exam still unsure
Trenching shall be performed such that piping is supported on a continuous and uniform bed throughout its entire length. Where over-excavation occurs, the trench shall be returned to the proper grade with approved material compacted to provide uniform support. Rocks and other hard objects shall be removed from the bearing surface. Backfill shall be free of discarded construction material and shall be placed in layers not exceeding 6 inches in depth, each tamped, until not less than 12 inches of cover has been achieved above the pipe.
FOR THIS
  • The trench drawn in cross-section
  • The layers and the cover depth in one box
  • You see it and you get it
Continuous bedding, no rocks, backfill in 6-in tamped layers until 12 in covers the pipe (IRC P2604).
CONTENTS

Take a Look at the 8 Parts and 62 Topics

How the inspection works, underground, drain lines, traps and venting, fixture-unit sizing, water supply and backflow, water heaters and the final, and review with exam practice: 66 pages, all illustrated.

IHow the Inspection Works · pp. 5-10
  1. Three Visits, Always in the Same Order
  2. Where Plumbing Lives in the IRC
  3. Edition, Adoption and Local Amendments
  4. How to Read a Code Table in Seconds
  5. Pass, Correction or Red Tag
  6. The P1 Exam: Open Book, Clock Running
IIUnderground · pp. 11-18
  1. Trench, Bedding and Backfill
  2. Building Sewer vs. Building Drain
  3. Going Through or Under the Foundation
  4. Water Service and Sewer in the Same Trench
  5. Water Service Size and Material
  6. Underground Fittings and Changes of Direction
  7. Underground Cleanouts
  8. The Underground Water Test
IIIDrain Lines: Slope, Fittings, Cleanouts · pp. 19-26
  1. Drain Slope by Pipe Size
  2. Why Too Much Slope Is Not Better
  3. The Fitting Direction Rule
  4. Drain Size Never Gets Smaller Downstream
  5. Cleanout Spacing
  6. Cleanout Size and Clearance
  7. Pipe Support Spacing
  8. Drilling, Notching and Nail Plates
IVTraps and Venting · pp. 27-36
  1. What a Trap Seal Does
  2. Traps You Must Never Approve
  3. Trap Size by Fixture
  4. Trap Arm Length
  5. Why Every Trap Needs a Vent
  6. Dry Vents: Rise Before You Run
  7. Vent Sizing Basics
  8. Wet Vents and Common Vents
  9. Air Admittance Valves
  10. Vent Terminals on the Roof
VFixture-Unit Sizing · pp. 37-43
  1. What a Drainage Fixture Unit Means
  2. The Bathroom Group Shortcut
  3. Sizing a Horizontal Branch
  4. Sizing the Building Drain
  5. Minimum Sizes That Override the Table
  6. Water Supply Fixture Units
  7. Sizing a Water Service, Worked
VIWater Supply and Backflow · pp. 44-51
  1. Pressure Limits
  2. Shutoff Valves: Where They Go
  3. PEX, CPVC, Copper: What to Look For
  4. Water Hammer Arrestors
  5. Hot on the Left
  6. Cross-Connections in a House
  7. Air Gap and Backflow Devices
  8. Indirect Waste and Dishwasher Drains
VIIWater Heaters and the Final · pp. 52-59
  1. T&P Relief Valve
  2. The T&P Discharge Pipe
  3. Drain Pan and Location
  4. Expansion Tanks and Closed Systems
  5. Shower and Tub Valves
  6. Shower Size and Clearances
  7. Final: Fixtures Set and Sealed
  8. Tests at the Final
VIIIReview and Exam Practice · pp. 60-66
  1. The Underground Checklist
  2. The Rough-In Checklist
  3. The Final Checklist
  4. Numbers to Have at Hand
  5. Most Frequent Rough-In Mistakes
  6. Exam Strategy with the Code Book
  7. Arguing a Correction by the Code

One Page, One Topic, All Clear

Think of it this way:

You're on a final, the water heater sits in the garage, and you have to check the relief valve before you sign off. What's the rating, and where does that sensor have to be?

You open the T&P page and see the tank drawn with the valve on top: 150 psi max, opens at 210°F or less, sensor in the top 6 inches, and the discharge pipe traced all the way down.

Lavatory 1, tub 2, kitchen sink 2, 1.6 gpf toilet 3: Table P3004.1 drawn fixture by fixture.

Same with drain slope, trap seals, fixture units, pressure limits and the underground water test: each one has its own page.

Plumbing Inspector Illustrated is 8 parts and 62 topics, all drawn, with a checklist for each visit and exam practice at the end.

What you see drawn, you don't have to memorize.

What's Inside Plumbing Inspector Illustrated:

Ipp. 5-10

How the Inspection Works

Know what to check at each visit and find any value fast: the three visits and their order, where plumbing lives in the IRC, editions and local amendments, reading a code table, pass vs. correction vs. red tag, and the open-book exam.

IIpp. 11-18

Underground

Trench, bedding and backfill, building sewer vs. building drain, going through the foundation, shared trenches, water service size and material, fittings, cleanouts and the underground water test.

IIIpp. 19-26

Drain Lines: Slope, Fittings, Cleanouts

Drain slope by pipe size, why too much slope fails, fitting direction, no reducing downstream, cleanout spacing and clearance, pipe support spacing, drilling, notching and nail plates.

IVpp. 27-36

Traps and Venting

Trap seal, traps you never approve, trap size, trap arm length, why every trap needs a vent, dry vents, vent sizing, wet and common vents, AAVs and roof terminals.

Vpp. 37-43

Fixture-Unit Sizing

What a drainage fixture unit means, the bathroom group, sizing a horizontal branch and the building drain, minimum sizes, water supply fixture units and a worked water service.

VIpp. 44-51

Water Supply and Backflow

Pressure limits, shutoff valves, PEX, CPVC and copper, water hammer arrestors, hot on the left, cross-connections, air gaps and backflow devices, indirect waste and dishwasher drains.

VIIpp. 52-59

Water Heaters and the Final

T&P relief valve and discharge pipe, drain pan and location, expansion tanks, shower and tub valves, shower size and clearances, setting fixtures and the tests at the final.

VIIIpp. 60-66

Review and Exam Practice

Checklists for the underground, rough-in and final, the numbers to have at hand, the most frequent rough-in mistakes, exam strategy with the code book and arguing a correction by the code.

At the end of the book: Inside the book: a one-page checklist for each inspection visit, the numbers to have at hand and exam strategy with the code book.

Plus: 2 Free Books

Plumbing Inspector Practice Questions: exam-style, with answers explained

BONUS 1: «Plumbing Inspector Practice Questions: exam-style, with answers explained»

Value on its own: US$ 17.90

Practice with exam-style questions and see why each answer is right, with the page of the book where the topic is drawn.

15 Common Plumbing Violations, Before & After

BONUS 2: «15 Common Plumbing Violations, Before & After»

Value on its own: US$ 14.90

See the violations that come up most often on residential jobs, drawn wrong and then drawn right, so you spot them at a glance.

Plumbing Inspector Illustrated with 2 Free Books

  • Plumbing Inspector Illustrated: 66 illustrated pagesUS$ 63
  • BONUS 1: Plumbing Inspector Practice Questions: exam-style, with answers explainedUS$ 17.90
  • BONUS 2: 15 Common Plumbing Violations, Before & AfterUS$ 14.90
  • High-resolution PDF to printIncluded
Total value US$ 95.80
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Who This Book Is For

Moving from plumber to inspector

Moving from plumber to inspector

You already know the work. Each page shows the IRC value behind what you've done for years, and where to find it.

Your exam date is set

Your exam date is set

You review the three inspections in the same order and know which table to open before the clock starts.

You're already inspecting

You're already inspecting

Print the pages and the one-page checklist for each visit inside the book, keep them in the truck, and back every correction with its section number.

Everything You Get Today

US$ 95.80US$ 27
YES, I WANT PLUMBING INSPECTOR ILLUSTRATED FOR US$ 27

📄 This is a digital PDF book sent to your email: nothing is printed or shipped.

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Frequently Asked Questions

Is it for me if I've been a licensed plumber for 20 years?

Yes. It's not a beginner book: it doesn't teach you to install pipe, it shows the IRC value behind what you already do and where it is in the code.

Where does the content come from?

From the 2024 International Residential Code, Part VII Plumbing (Chapters 25–33), and the ICC P1 Residential Plumbing Inspector exam outline. If your state or city uses the Uniform Plumbing Code (UPC) or its own plumbing code, many values are different, so check which code your exam uses before you buy. Always confirm the edition and local amendments your jurisdiction adopted.

Is it official material?

No. It's an independent study guide, not affiliated with the ICC or any exam body or jurisdiction. It doesn't give you a certification or CEU credits: the certification comes only from passing the ICC exam.

Does it replace a prep course or the code book?

No. The exam is open book, so you still bring the code book your jurisdiction adopted. This book is for finding things fast: each topic drawn, with its IRC section on the page, so you know which table to open before you start flipping.

Are the practice questions the real exam questions?

No. They're written for this book in exam style, with the answer explained and the page where the topic is drawn.

When and how do I get it?

The book and the 2 free books arrive as PDFs by email, at the address you enter at checkout.

Do I have to pay every month?

No. It's a one-time payment.

Can I have it on paper?

Yes. It's a PDF you can print, whole or page by page, and keep in the truck.

How does the refund work?

You have 30 days. We refund everything if the file won't open, if the book isn't what you see on this page, if you were charged twice or if the email doesn't arrive: just email us.

Before You Close This Page

No more rereading the code book with nothing sticking.

Drain slope, trap seals and the T&P valve: you see them drawn and you're set.

You walk into the exam knowing where everything is.

Drawings make studying faster.

The book is right below.

One-time payment: US$ 27 · Guarantee: 30 days · PDF by email

YES, I WANT PLUMBING INSPECTOR ILLUSTRATED FOR US$ 27

📄 This is a digital PDF book sent to your email: nothing is printed or shipped.