Plumbing Inspections
for Home Buyers
Buying a home is likely the largest purchase you'll ever make. A licensed plumber's eyes on the plumbing — before you close — can be the difference between a great investment and an expensive surprise.
Pre-purchase inspections · Secondary reviews · Sewer line scopes · Line locates
What We Offer Home Buyers
Three Ways We Help
Before You Close
Full Plumbing Inspection
A licensed plumber's comprehensive walk-through of every plumbing system in the home — something a general inspector simply isn't scoped or equipped to provide.
- Supply line material and condition
- Water heater age, type, and remaining life
- Visible drain and waste system assessment
- Water pressure and flow evaluation
- Fixture condition and shutoff valve function
- Crawl space and accessible areas
- Written summary of findings
Secondary Inspection Review
Already have a general home inspection report and want a plumber's read on it? We review the plumbing findings, translate what they actually mean, and tell you what warrants follow-up.
- Review of existing inspection report
- Plain-language explanation of flagged items
- Severity assessment: urgent vs. monitor vs. cosmetic
- Cost range estimates for noted repairs
- Recommendations for negotiation or further investigation
- Available by phone or on-site visit
Sewer Line Scope & Locate
A camera inspection of the drain and sewer lines reveals what no visual inspection can — and a line locate tells you exactly where any problem is, and whose responsibility it is to fix it.
- Camera scope from cleanout to municipal connection
- Root intrusion, belly, offset joint, and crack detection
- Pipe material and condition assessment
- Line locate to pinpoint problem location
- Responsibility determination — property vs. utility
- Video recording and written report
A Generalist Isn't a Plumber
What a Standard Home Inspection
Often Doesn't Cover
A general home inspector is trained across hundreds of systems — roofing, electrical, HVAC, structure, and plumbing all in a single walk-through. They do important work. But they're not plumbers, and the plumbing portion of a general inspection is typically limited to what's visible and accessible in a short window of time.
That leaves real gaps. Some of the most expensive plumbing problems in a home — a failing sewer line, corroded galvanized supply pipes rusting from the inside, a water heater at the end of its service life — either don't show obvious symptoms or aren't accessible during a standard inspection. They show up weeks or months after you move in.
A licensed plumber inspection isn't a replacement for a general home inspection. It's a complement to it — focused depth on the systems that carry the most expensive repair risk.
Sewer Line Condition
General inspectors almost never camera-scope drain lines. Root intrusion, settled pipes, and cracked laterals are invisible without a scope — and a sewer line replacement can run $5,000–$20,000 or more.
Pipe Material and Remaining Life
Galvanized steel supply pipes corrode from the inside out. The outside looks fine right up until they fail. Identifying galvanized or polybutylene piping in a home requires a trained eye and knowledge of typical installation eras.
Water Pressure and Flow
Low pressure can indicate a failing pressure regulator, undersized supply lines, or significant mineral buildup — none of which show up visually. We check at the source, not just at a fixture.
Crawl Space and Hidden Leaks
A slow drip behind a wall or under the subfloor may show no surface symptoms during an inspection but can cause significant structural damage over time. We look where generalists don't always go.
We Don't Replace Your Home Inspector. We Protect You Where They Can't.
We work alongside real estate agents, buyers, and general inspectors — not against them. Our goal is simple: give you a clear, honest picture of the plumbing before you commit to the largest purchase of your life. If everything looks good, we'll tell you. If something warrants attention or negotiation, we'll tell you that too — with specifics, not vague concerns.
The Inspection No One Sees Coming
Sewer Line Scope —
What the Camera Finds
A sewer scope runs a camera through your drain lines from a cleanout or access point all the way to the municipal connection — revealing the condition of pipes that are completely hidden from any surface inspection. It takes an hour. What it finds can change everything about a purchase decision.
Sewer line problems are among the most expensive repairs a homeowner can face, and they almost never show symptoms until they fail. A camera inspection is the only way to know the condition of the lines before you own them.
We provide a recorded video of the full scope along with a written report of findings — something concrete you can take to your agent or use in negotiations.
Root Intrusion
Tree and shrub roots enter through pipe joints and grow inside the line over years. Fine roots become a mass that blocks flow and, over time, breaks the pipe from the inside out. One of the most common findings in older neighborhoods.
Belly or Sag
A section of pipe that has settled lower than the surrounding line, creating a low spot where water and waste pool rather than flow. Minor bellies get worse over time; significant bellies cause chronic backups and eventual failure.
Offset Joints
Pipes that have shifted at the connection point, creating a gap or step in the line. Common in areas with soil movement or settlement. Debris and roots accumulate at the offset, accelerating blockage and damage.
Cracks and Fractures
Ground movement, frost heave, or simply age can crack sewer pipe — particularly older clay tile and cast iron lines. Cracks allow groundwater infiltration and sewage egress, and they grow over time.
Pipe Material and Age
Cast iron, clay tile, Orangeburg, ABS, and PVC all have different life expectancies. We identify what's there and assess remaining serviceability — so you know whether you're buying a line that needs replacement in 2 years or 20.
Location Determines Liability
Line Locates — Knowing
Whose Problem It Is
Finding a problem in the sewer line is only part of the picture. The other critical question is: where exactly is it — and who is responsible for the repair?
In most municipalities, homeowners are responsible for the sewer lateral from the house to the connection with the public main, which typically runs under the street. In some jurisdictions that responsibility extends only to the property line; in others it extends to the tap at the main itself. The rules vary, and they matter significantly when a repair is needed.
A line locate uses the camera signal to pinpoint the exact location of a problem in the ground. That location — measured from the house, mapped relative to the property line and street — determines whether the repair is the seller's obligation, the buyer's future expense, or potentially a shared or utility responsibility.
We provide this information in a format that's useful to your real estate agent and attorney — because knowing precisely where a break sits often directly affects what happens at the negotiating table.
replacement cost range
common in older area homes
From Finding to Negotiation
A camera finding without a locate is just a problem. A locate turns it into actionable information.
- Confirms whether damage is on the property or under the street
- Determines if the utility or municipality may share responsibility
- Gives your agent a specific repair estimate to negotiate with
- Documents pre-purchase condition if you proceed with the sale
- Eliminates "we didn't know" as a future dispute after closing
The Maxwell Difference
Why Home Buyers
Choose Maxwell Plumbing
We Work on Your Timeline
Inspection windows in home purchases are short. We understand the urgency and work to schedule promptly — giving you findings in time to act on them before contingency deadlines.
Honest Findings, In Writing
We tell you what we find — not what's convenient for a transaction to proceed. Our written summaries are clear, specific, and useful for your agent, attorney, or lender. We don't hedge or soften what we see.
Licensed Plumbers, Not Inspectors
We're licensed plumbers who do inspections — not inspectors with a general checklist. The difference shows in what we find, how we assess it, and the accuracy of any cost estimates we provide.
Common Questions
Home Buyer Plumbing FAQs
Questions we hear from buyers, agents, and families navigating a home purchase — answered plainly.
Call 360-209-4048 →Do I really need a plumber if I already have a home inspector? +
How long does a pre-purchase plumbing inspection take? +
The inspection report mentioned some plumbing concerns. Can you review it? +
What does a sewer scope actually show you? +
If there's a problem with the sewer line, who has to pay for it? +
Can findings from your inspection be used in negotiations? +
What areas do you serve? +
What Customers Say
Trusted by Neighbors Across
SW Washington & Portland
"Aaron was on time and thorough with his explanation of what work would need to be done. He answered all of my questions and went above and beyond by indicating other parts of my plumbing that would benefit from an upgrade. He is honest and thoughtful."
"HONEST, Professional, clean, did great work, super fair price. What more could you ask for?"
"Excellent service, timing, and very knowledgeable. Will be using Maxwell Plumbing again in the future and referring others to them."
"Maxwell Plumbing did a fantastic job hooking up our outdoor kitchen. He went above and beyond making us understand what he was doing and why. Communicated throughout the entire project and was reasonable on price."
"Excellent experience including scheduling, communication to service provided. Highly recommend."
"Always professional, kind, and helpful. Our go-to plumber."
Before You Close
Know What You're
Buying.
A $300 inspection can save you from a $15,000 surprise. We'll get out to the property quickly, give you honest findings in writing, and make sure you go into closing with a clear picture of what's there.