Fix your own plumbing: a homeowner's path
This curriculum takes a complete beginner from "what is a P-trap?" to confidently handling most common home plumbing repairs, fixture replacements, and rough-in work — while building the judgment to recognize when a licensed plumber is truly needed. Each stage builds on the last: first comes the mental model of how water moves through a home, then hands-on repair skills, then fixture and pipe work, and finally code awareness and project planning for the ambitious DIYer.
Foundations: How Home Plumbing Works
New to itUnderstand the two systems in every home (supply and drain-waste-vent), learn the vocabulary, and develop the safety instincts to know what to touch and what to leave alone.
▸ Study plan for this stage
Pace: 3–4 weeks, ~20–25 pages/day. Focus the first week on the introductory and "how it works" chapters covering supply and DWV systems. Week 2 covers tools, materials, and codes. Weeks 3–4 revisit confusing sections, build vocabulary, and complete the hands-on exercises. The book is heavily visual — spen
- The two-system model: the supply system (pressurized cold and hot water in) and the drain-waste-vent (DWV) system (gravity-fed waste out) are entirely separate and must never cross-contaminate.
- Water pressure and flow: supply lines operate under constant pressure (typically 40–80 psi); understanding this explains why shutting off the correct valve before any work is non-negotiable.
- The role of the vent stack: vents allow air into the drain system so waste flows freely and sewer gases are directed safely out through the roof rather than into living spaces.
- Fixture anatomy: every fixture (toilet, sink, tub, shower) connects to both systems and includes a P-trap that holds a water seal to block sewer gas.
- Shutoff valves — main, branch, and fixture-level: locating and operating these is the single most important safety skill at this stage.
- Pipe materials and their identifiers: copper (supply), CPVC (supply), PEX (supply), ABS/PVC (drain), galvanized steel (older supply/drain) — the book's photos make identification straightforward.
- Reading a plumbing diagram: the book's cross-section illustrations show how supply and DWV rough-in together inside walls and floors; being able to trace a water path end-to-end is a foundation skill.
- Code awareness and permits: the book introduces local code requirements and when a permit is required — knowing what NOT to do unsupervised is a key beginner safety instinct.
- Can you trace the complete path of cold water from the municipal main (or well pump) to a kitchen faucet, naming every component it passes through as shown in the book's supply-system diagrams?
- What is the purpose of the vent stack, and what symptom would you notice at a fixture if the vent were blocked?
- Where are the three levels of shutoff valves in a typical home (main, branch, fixture), and how would you locate and operate each one in an emergency?
- How does a P-trap work, and why does every fixture drain require one according to the book?
- Looking at the pipe materials illustrated in the book, how would you identify whether a pipe in your home is copper, PEX, CPVC, PVC, ABS, or galvanized steel — and which are used for supply vs. drain?
- Which plumbing tasks shown in the book require a permit in most jurisdictions, and why is pulling a permit important for a homeowner?
- House walk-through — supply mapping: Armed with the book's supply-system diagram, physically trace the cold- and hot-water lines in your own home from the main shutoff to at least three fixtures. Sketch a rough map and label pipe materials you can identify.
- Shutoff valve drill: Locate every shutoff valve in your home (main, under sinks, behind toilets, at the water heater). Practice turning each one off and back on. Note any that are stuck or corroded — these are your first real maintenance items.
- DWV listening exercise: Run water at a sink and listen at the drain. Then block the overflow hole with a wet rag and listen again. Use the book's vent-system explanation to interpret what you hear (gurgling = vent issue).
- Pipe-material scavenger hunt: Photograph every visible pipe in your home (basement, under sinks, utility room). Use the color photos in the book to identify each material and note whether it is supply or drain.
- Vocabulary flashcards: From the book's glossary and captions, create 20 flashcards covering terms such as P-trap, stack, branch drain, riser, shutoff, air gap, backflow, rough-in, and DWV. Quiz yourself until you can define each without hesitation.
- Diagram redraw: Without looking at the book, sketch a simple cross-section of a two-story home showing both the supply and DWV systems for one bathroom. Then compare your sketch to the book's illustrations and annotate the differences.
Next up: Mastering the vocabulary, system logic, and safety instincts in this stage gives you the mental model needed to understand *why* specific repair and replacement procedures work the way they do — which is exactly what the next stage's project-based content will build on.
A widely-used visual reference that reinforces the vocabulary and shows real photos of every component; reading it after Cauldwell cements the concepts with step-by-step context.
First Repairs: Fixing What Breaks Most Often
New to itDiagnose and fix the most common household plumbing failures — dripping faucets, running toilets, slow drains, and minor leaks — using basic tools and safe shut-off procedures.
▸ Study plan for this stage
Pace: 6–8 weeks total. Week 1–3: Read the plumbing chapters of "Dare to Repair, Replace, and Renovate" by Julie Sussman (~20–25 pages/day), focusing on her step-by-step, beginner-friendly walkthroughs of faucets, toilets, and drains. Week 4–8: Move into the plumbing section of the "Reader's Digest Complet
- Water shut-off procedures: locating and operating both fixture-level stop valves and the whole-house main shut-off, as introduced in Sussman's safety-first approach
- Anatomy of a faucet: understanding compression, ball, cartridge, and ceramic-disc faucet types and how each causes drips differently, covered in both Sussman and the Reader's Digest Manual
- Toilet mechanics: the fill valve, flapper, float, and flush valve assembly — how a running toilet wastes water and how to diagnose which component has failed, per both books
- Drain systems and clogs: the role of P-traps, drain stoppers, and venting; safe use of plungers, drain snakes, and manual augers as detailed in the Reader's Digest Manual
- Basic tool kit for first repairs: adjustable wrenches, basin wrenches, pliers, plumber's tape (PTFE), and replacement washers/O-rings as listed in Sussman
- Minor leak repair: tightening compression fittings, replacing supply-line washers, and applying pipe tape to threaded joints without over-tightening
- Reading a repair: using the diagnostic flowcharts and photo sequences in the Reader's Digest Manual to identify a problem before touching any hardware
- Working safely and cleanly: draining lines before disassembly, having towels and a bucket ready, and testing repairs before reassembling — habits reinforced throughout Sussman
- After reading Sussman, can you describe the exact sequence of steps to stop water flow at a fixture before beginning any faucet or toilet repair?
- What are the four main faucet types covered across both books, and what is the single most common failure part in each type?
- A toilet runs continuously after flushing. Using the diagnostic logic from the Reader's Digest Manual, what are the three components you would inspect first, and in what order?
- What is the purpose of a P-trap, and how do you safely remove and clean one using the method described in the Reader's Digest Do-It-Yourself Manual?
- Sussman emphasizes replacing the whole repair kit rather than just the worn part — what is her reasoning, and when does the Reader's Digest Manual suggest the same approach?
- How do you test a repair for leaks before fully reassembling a faucet or toilet, and what signs indicate the fix was successful?
- Shut-off drill: Without doing any repair, locate every fixture stop valve in your home (sinks, toilets, washing machine) and the main shut-off. Turn each one off and back on to confirm it operates freely — exactly as Sussman recommends before any job.
- Faucet teardown: Choose one dripping faucet, identify its type using the diagrams in the Reader's Digest Manual, purchase the correct repair kit, and follow Sussman's step-by-step instructions to disassemble, replace the worn parts, and reassemble.
- Toilet tune-up: Lift the tank lid on one toilet, flush it, and watch the fill and flush cycle. Use the Reader's Digest Manual's labeled diagram to name every component you see. Then adjust the float to correct the water level per the manual's instructions.
- Flapper replacement: Turn off the toilet supply valve, flush to empty the tank, and replace the flapper using Sussman's guidance. Time yourself — this is a repair that should take under 15 minutes once you know the steps.
- Drain cleaning: Remove and clean the pop-up stopper from a bathroom sink drain using the Reader's Digest Manual's method. Follow up by running a small hand auger 2–3 feet into the drain to clear any buildup, then flush with hot water.
- Leak simulation review: After any repair, deliberately leave the stop valve slightly open, restore water pressure slowly, and inspect every joint and connection for drips before declaring the job done — practicing the test-before-you-trust habit from both books.
Next up: Mastering these isolated, single-fixture repairs builds the diagnostic confidence and tool familiarity needed to tackle the next stage's more complex work — replacing entire fixtures, working with supply and drain rough-in, and understanding how individual repairs connect to the broader plumbing system.
Written for first-timers with zero assumed knowledge, it walks through faucet repairs, toilet fixes, and drain clearing in plain language — an ideal confidence-builder before tackling anything more complex.
A classic household reference whose plumbing chapters cover repairs in depth; reading it here expands the beginner's toolkit and introduces the concept of when a repair crosses into a bigger project.
Going Deeper: Codes, Systems, and Bigger Projects
Going deepUnderstand residential plumbing codes, plan and execute larger projects (adding a bathroom, re-piping a section), and make informed decisions about what requires a licensed professional.
▸ Study plan for this stage
Pace: 8–10 weeks total: Weeks 1–6 cover "Plumbing a House (For Pros by Pros)" by Peter Hemp (~20–25 pages/day, reading carefully and re-reading technical diagrams); Weeks 7–10 cover "Code Check Plumbing & Mechanical 2021" by Douglas Hansen (use as a reference-style read — work through each illustrated cod
- Whole-house plumbing design: how supply, DWV (drain-waste-vent), and fixture branches are planned and coordinated from the ground up, as detailed in Hemp's layout and rough-in chapters
- Rough-in sequencing and coordination with other trades: understanding the order of work (framing, rough-in, inspections, finish) and how plumbing fits into a full construction schedule per Hemp
- Sizing and layout of DWV systems: pipe sizing rules, wet venting, air admittance valves, and stack configurations as Hemp presents them for new construction
- Water supply system design: sizing supply mains and branches, pressure considerations, manifold/home-run systems vs. trunk-and-branch, and material selection (PEX, copper, CPVC) from Hemp's coverage
- Adding a bathroom or fixture group: the planning, permitting, and execution process for significant additions, drawing on Hemp's project-level walkthroughs
- Re-piping strategies: when and how to re-pipe a section or whole house, access methods, and material transitions as addressed by Hemp
- Navigating the International Plumbing Code (IPC) and International Mechanical Code (IMC): how to read and apply illustrated code tables, figures, and annotations as structured in Hansen's Code Check
- Permit, inspection, and professional licensing thresholds: using Hansen's code check framework to identify which work requires licensed contractors, permits, and inspections — and why
- After reading Hemp, can you sketch a complete single-story house DWV diagram — including stack, branch drains, trap arms, and vent connections — with correct pipe sizing noted at each segment?
- What factors does Hemp identify for choosing between a trunk-and-branch supply system and a home-run/manifold PEX system, and under what conditions is each preferred?
- Using Hansen's Code Check, what are the minimum drain slope, trap-to-vent distance, and wet-vent diameter requirements for a new bathroom addition under the IPC?
- What sequence of rough-in steps and inspections does Hemp describe for adding a full bathroom to an existing house, and at what points must work stop pending inspection?
- According to Hansen's Code Check, which plumbing tasks universally require a licensed plumber and a pulled permit in residential construction, and what are the consequences of skipping them?
- How do Hemp and Hansen together inform a go/no-go decision on a DIY re-pipe project — what technical, legal, and safety criteria must be evaluated?
- Draft a to-scale rough-in plan: Using Hemp's layout principles, draw a full DWV and supply plan for a hypothetical 3-bedroom, 2-bath house on graph paper, labeling pipe sizes, vent locations, cleanouts, and fixture units on every branch.
- Code-check your own home: Walk through your residence with Hansen's Code Check in hand and audit 10–15 visible or accessible plumbing conditions (trap accessibility, vent termination height, water heater T&P relief discharge, etc.), noting any deviations from code.
- Permit research exercise: Contact or visit your local building department (or check their website) and document the exact permit application process, fee schedule, and inspection stages required for adding a bathroom in your jurisdiction — compare these to what Hemp describes.
- Material take-off drill: Using Hemp's rough-in chapters, create a complete bill of materials (pipe lengths, fittings, hangers, valves) for a hypothetical bathroom addition, then price it out at a local supplier to understand real project costs.
- Re-pipe planning simulation: Choose one branch of your home's supply system (e.g., the kitchen cold-water line) and write a step-by-step re-pipe plan referencing both Hemp's methodology and Hansen's code requirements — include access strategy, material choice, isolation valves, and inspection checkpoints.
- Code scenario flashcards: From Hansen's Code Check, extract 20 illustrated code rules (e.g., maximum developed length of a trap arm, required cleanout locations, fixture unit loads) and make flashcards; quiz yourself until you can recall and explain each rule without the book.
Next up: Mastering whole-house design logic, code compliance, and the professional/DIY boundary in this stage gives the reader the judgment and vocabulary needed to confidently tackle specialized systems — such as gas piping, hydronic heating, or water treatment — or to manage and communicate effectively with licensed contractors on complex projects.
A Taunton Press title written by a journeyman plumber that explains whole-house rough-in and finish plumbing from a code-aware perspective — essential for understanding the full scope of a system.
The go-to field guide for understanding what the International Residential Code actually requires; reading this last gives the DIYer the professional judgment to know exactly where the legal and safety lines are drawn.