The short answer
A home inspector does a visual, functional check of the plumbing: they run faucets, flush toilets, look for leaks under sinks, check water pressure and drainage, inspect the water heater, and note the visible pipe materials. What they generally don’t do is open walls or scope the underground sewer line — which is exactly where the most expensive surprises hide. That gap is why many Tucson buyers add an independent plumbing or sewer inspection.
What a home inspector checks
- Fixtures and faucets. They turn on sinks, showers, and tubs to check flow and look for drips, then flush toilets to confirm they work and don’t run or rock.
- Visible leaks. They look under sinks and around fixtures for active leaks, water stains, and corrosion they can see without dismantling anything.
- Water pressure and drainage. They get a general sense of whether pressure is adequate and whether drains carry water away at a normal pace.
- The water heater. They note its age, size, and condition, check for obvious leaks or corrosion, and confirm safety features like the temperature-pressure relief valve are present.
- Pipe materials. They identify the visible supply and drain materials — useful in older Tucson homes that may still have galvanized or other dated piping.
What they usually don’t check
The underground sewer line. A standard home inspection does not include a camera scope of the main sewer line — and that’s where root intrusion, cracks, and collapses live. A separate sewer camera inspection is the only way to know its condition.
Anything behind walls or under the slab. Inspectors don’t open walls or floors, so a slab leak or an in-wall pipe problem can go unnoticed unless there’s a visible symptom.
Pipe interiors. They see the outside of accessible pipe, not the buildup, scale, or corrosion inside it.
Buyer tip: the home inspection report tells you what’s visibly wrong. For an older home, pairing it with an independent sewer scope is cheap insurance against the kind of repair that runs into the thousands.
What to do with the plumbing section of the report
- Separate cosmetic from serious. A dripping faucet is a quick fix; low pressure across the whole house or signs of an old sewer line are worth investigating before you close.
- Get the flagged items quoted. A licensed plumber can tell you what a repair actually costs, which helps you negotiate or budget.
- Add a sewer scope on older homes. If the home predates modern PVC sewer lines, scope it. Know the signs of sewer trouble so you understand the findings.
- Plan the must-fix items. Prioritize anything involving active leaks, the water heater, or the main line.
Bought a home with plumbing flagged on the report? We’ll quote the repairs honestly and scope the sewer line if it’s an older property. Call Al Coronado Plumbing at (520) 834-8400, Tucson’s trusted plumber since 1981.
Frequently asked questions
Does a home inspection include the sewer line?
Almost never. A standard home inspection is a visual check and does not include a camera scope of the underground sewer line. For older homes especially, a separate sewer inspection is the only reliable way to know its condition.
Should I get a separate plumbing inspection when buying a home?
It’s worth it for older homes or any property where the inspection report flags plumbing concerns. A licensed plumber can dig deeper than a general inspector — quoting repairs and scoping the sewer line so there are no five-figure surprises after closing.
Can a home inspector find a slab leak?
Only if there’s a visible symptom, like a warm spot on the floor or unexplained moisture. Inspectors don’t open the slab, so a hidden slab leak can be missed. If you suspect one, a plumber with leak-detection equipment can confirm it.
What plumbing problems are most common in older Tucson homes?
Aging galvanized supply lines, clay or cast-iron sewer lines vulnerable to root intrusion, hard-water scale that shortens water heater life, and original fixtures near the end of their service life. A pre-purchase plumbing check helps you spot these early.