In a 1920s Craftsman, the report may note galvanized supply lines, corrosion or patches, weak water pressure, old cast-iron or clay drains, mixed materials from past repairs, and aging fixtures or shutoffs. A general inspection checks accessible plumbing, and a plumber can evaluate any concerns before your contingency deadline.
For a buyer under contract in Pasadena or the San Gabriel Valley, the useful question is what those observations mean for this particular house. I want you to know what was inspected, what was hidden, and whether a specialist can give you enough information to make your decision within your inspection contingency.
Ready to move forward? Let's talk.
What can the inspector actually see and test?
A general home inspection gives you a broad look at accessible conditions. California law describes a home inspection in connection with a residential transfer as a noninvasive examination designed to identify material defects, including in plumbing systems. A material defect significantly affects value, desirability, habitability or safety, according to California Business and Professions Code section 7195 (checked 2026-11-04).
Under the InterNACHI general inspection standard (checked 2026-11-04), the inspector checks the interior water supply, including fixtures and faucets by running water, and the drain, waste and vent system, and reports observed active leaks. That is a trade standard, not a promise that every inspector uses the same agreement. Ask yours in writing what the inspection includes.
At the house, ask the inspector to explain visible supply and drain lines, fixtures, shutoffs, the water heater, pressure and signs of leaks. Ask whether the under-house area is accessible and what could not be reached. A blocked crawl-space opening can leave an important gap in the picture. Have the inspector record that gap in the report under the InterNACHI general inspection standard.
If you want help coordinating the inspection questions with your offer, call me at (213) 262-5092 and we can talk through your timeline.
What might galvanized supply lines tell you?
Supply lines bring water to fixtures. Galvanized pipe is iron or steel coated with zinc to help resist corrosion. The U.S. Environmental Protection Agency describes galvanized service pipe as iron or steel dipped in zinc to help prevent corrosion and rusting (checked 2026-11-04). The EPA definition applies to service lines from the main to the building inlet.
Ask the inspector where the material is visible and whether there are signs of corrosion, leakage or prior patches. If a remodeled bathroom has newer visible piping, ask whether older sections remain elsewhere. Mixed materials help a plumber trace past repairs and identify sections that need closer evaluation.
Weak flow at a faucet deserves a closer look, too. Tell the inspector which fixtures concern you and ask the plumber to investigate the cause. If you see galvanized pipe, corrosion or patches, get a plumber's opinion and a written repipe quote before your contingency deadline.
Ready to move forward? Let's talk.
What do old drains, fixtures and shutoffs add to the picture?
Older cast-iron or clay drain materials, visible repairs and mixed sections can give the inspector useful clues about the home's plumbing history. Ask where each material appears, whether the inspector saw an active leak, and whether access was sufficient to evaluate the area. Have the inspector identify the location of any leak or repair so a plumber can assess it.
Fixtures and shutoffs are worth discussing individually. Ask which fixtures were operated, what happened when water ran, and whether a shutoff or connection showed a visible problem. For the water heater, ask what was accessible, what the inspector observed, and whether a specialist should look further. I would rather have the concern and its location written clearly than rely on a vague note that the plumbing is old.
The sewer lateral is a separate scope, and Pasadena's Sewer System Management Plan says the property owner is responsible for the private lateral (checked 2026-11-01); ask a plumber about a camera inspection of the lateral.
To discuss how a finding fits your purchase, text me with the report language and your questions.
What can a general inspection leave unanswered?
Concealed pipes behind finishes and underground lines are not the same as accessible pipe in a crawl space. The InterNACHI standard does not require inspection of underground utilities, and a noninvasive inspection cannot reveal everything hidden from view. Conditions, access and the inspector's agreement affect what gets examined. Ask in writing whether the under-house area, supply lines, drains and water heater are included and how inaccessible areas will be reported.
The same standard does not require a determination of water quality or potability. If drinking water is a concern, discuss separate testing with a qualified provider. The EPA's lead-in-drinking-water guidance says testing is the only sure way to know whether harmful amounts of lead are present (checked 2026-11-04). A visual inspection of interior plumbing is not a water test.
Keep the distinction between an observation and an unknown. “No active leak observed” reflects what the inspector saw during the visit; it does not prove that every concealed connection is sound. Ask the inspector to identify the limits in the report so the plumber can address the most useful next questions. For drinking water, the EPA says testing is the only sure way to know whether harmful amounts of lead are present.
Ready to move forward? Let's talk.
What should you do with the report before removing contingencies?
Read the findings and limitations together, then arrange a plumber's evaluation while there is time to act under your contract. Share the full report, photos and any seller information about past work. Ask the plumber which sections were evaluated, what remains concealed, whether the visible repairs need attention, and what further investigation would answer the open questions.
Request a written repipe quote if replacement is being considered, along with the plumber's explanation of the proposed scope. Ask which supply lines and fixtures the quote covers, what access it assumes, and what could change once concealed areas are opened. If a localized repair is an option, ask for its scope as well. Use the written scope and quote to weigh your options before removing contingencies.
| Report finding | Useful follow-up |
|---|---|
| Corroded or patched visible supply pipe | Ask a plumber to assess condition and identify the affected area. |
| Weak flow at a fixture | Ask the plumber to investigate the cause before choosing a repair. |
| Inaccessible under-house area | Ask how access can be arranged and whether another visit is needed. |
| Recommendation for further evaluation | Share the report and obtain a written scope and quote. |
Once you have the specialist's explanation, I can help you discuss requesting repairs or a credit. We can weigh the seller’s response alongside the plumber’s written scope and quote before your contingency deadline. Call me at (213) 262-5092 so we can review the finding in the context of your purchase.
How does plumbing fit into the rest of your inspection plan?
Plumbing is one part of the house. You can also read my Moving to Pasadena Guide. Start with my guide to what to inspect before buying a Pasadena Craftsman, then use the general report to decide where a specialist can answer a question that matters to you. The guide to specialist inspectors for an older house can help you prepare those conversations.
Other findings may need their own follow-up. Read about foundation concerns, whether to add a roof and chimney inspection, and insurance questions when knob-and-tube wiring is present. Arrange specialist follow-up before your contingency deadline, including a camera inspection of the private lateral, which is the property owner’s responsibility in Pasadena.
Ready to move forward? Let's talk.
Plumbing inspection questions buyers ask
Does galvanized pipe mean I need to repipe immediately?
No. The material alone does not establish the condition of every section or dictate an immediate replacement. Ask a plumber to evaluate the accessible system, explain any limitations, and quote the work they recommend before you decide.
Will a home inspector see pipes inside the walls?
A general inspection is noninvasive, so concealed piping may not be visible. Ask the inspector in writing what areas and systems are included and what access is needed, then discuss any gaps with a plumber.
Is weak pressure proof that the pipes need replacement?
No. Weak pressure is a symptom, not a diagnosis. Ask a plumber to investigate the affected fixtures and supply piping and explain the cause before you choose a repair.
If you are deciding what to investigate, text me and we can review the next step.
Does a plumbing inspection test drinking water?
Do not assume it does. The InterNACHI general inspection standard does not require determining water quality or potability. If water quality concerns you, ask about separate testing.
Should I ask the seller to repair the plumbing?
That depends on the report, the plumber’s evaluation, the quote, and your contract. I can help you discuss a repair request or credit with the seller and weigh the response before your contingency decisions.
Does a clean report guarantee the plumbing will last?
No. A report describes observations within the inspector’s scope and access. It cannot show every concealed condition or guarantee future performance, so review the limitations as carefully as the findings.
Sources
- California Business and Professions Code section 7195, checked 2026-11-04
- InterNACHI, International Standards of Practice for Performing a General Home Inspection, checked 2026-11-04
- U.S. EPA, Service Line Inventory and Replacement Requirements, checked 2026-11-04
- U.S. EPA, Basic Information about Lead in Drinking Water, checked 2026-11-04
- City of Pasadena, Sewer System Management Plan Update, checked 2026-11-01
Justin Borges
Team Lead, The Borges Real Estate TeamDRE #01940318
With over 13 years in Southern California real estate, Justin specializes in probate sales, trust properties, and character homes. His expertise in 1031 exchanges and historic preservation has helped hundreds of clients navigate complex real estate transactions.