A home inspection report can run to fifty pages, and the plumbing section is where buyers and sellers tend to stall. The language is technical, the findings are listed with the same weight, and a missing escutcheon looks as serious as a corroded water heater. This guide reads the plumbing section the way a plumber does, so you can tell what is urgent, what is worth fixing, and what you can safely ignore.
The plumbing items that matter most on an inspection report are anything that leaks, anything that is unsafe (water heater relief valves and discharge pipes, gas connections and shutoffs), anything that suggests a larger problem (old or corroded supply pipe, slow or backing-up drains, a sewer line concern) and missing shutoff valves. Cosmetic and maintenance items can wait. Get a plumber to price each item separately, so you can choose which go on the repair request. In a Texas sale, time is short, so start before the option period runs out.
- Sort findings into three groups: leaking or unsafe, worn and due soon, and notes. Only the first group is urgent.
- A water heater with no drain pan, a missing or badly routed relief valve discharge pipe or a corroded tank is a common and genuine finding.
- Old galvanized or corroded supply pipe, or a sewer line the inspector could not assess, deserve a closer look before you commit.
- Missing or stuck shutoff valves are cheap to fix and easy to put on a repair request.
- A plumber's written work order is a record you can give the other side of the sale.
How to read the plumbing section
Inspectors report what they can see. They run the water, flush the toilets, look under sinks, check the water heater and look at what is accessible. They do not open walls, dig up pipes or scope sewers unless that is a separate service. So a finding is either something visibly wrong, something that looks like it will be wrong soon, or a place they could not check and want you to follow up on.
Look at the wording:
"Leak," "active leak," "moisture," "staining" means water where it should not be. Treat these as priority."Recommend evaluation by a licensed plumber" means the inspector saw something they cannot fully judge. It is not necessarily bad, but it needs an answer."Not functioning as intended," "unsafe," "safety hazard" are the strongest terms in the report."Maintenance item," "cosmetic," "note" are mostly low priority.
The findings that come up most
The water heater
The water heater generates more findings than any other fixture. Common ones:
No drain pan or pan not piped to a drain where a leak would damage the floor, which matters most for an attic or a closet in a living areaThe temperature and pressure relief valve discharge pipe missing, too short, capped or badly routed. This is a safety item. The valve exists to release pressure, and the pipe has to carry hot water safely to a visible, safe place.Corrosion at the connections or at the bottom of the tank , which signals a leak that has started or willVenting concerns , such as a gas heater whose flue is disconnected or not sloped correctlyAge. An inspector may note the date on the label. A heater at the end of its expected life is not a defect, but it is a cost to plan for.A gas heater with no shutoff within reach or an old connector
If the water heater is in the attic, the photo on this page shows what it looks like when it is done properly: two gas heaters with a flexible connector and a shutoff valve at the base of each. For more on the options, see our water heater experts page.
Leaks at fixtures and valves
Dripping under sinks, at the base of toilets, at shower valves, at supply connections and at outdoor taps. Most are minor repairs. What matters is what the leak has already done: a stain on a ceiling below a bathroom, soft flooring around a toilet, a cabinet base that has swollen. A small leak that has been going for a year is a bigger repair than the leak itself.
Old, corroded or unusual supply pipe
Houses of different ages have different pipe, and inspectors note it:
Galvanized steel corrodes from the inside, reduces flow and eventually leaks. Corroded galvanized is a common reason for a repipe.Polybutylene in some homes built in the 1980s and 1990s has a reputation for failing, and insurers may ask about it.Mixed materials and old repairs, which can be fine or can be where the next leak is.Corroded fittings at the water heater or at valves.
The finding is usually "recommend evaluation," and the answer depends on what a plumber sees. A single corroded section is a repair. A whole house of old galvanized is a repipe. See our repipe specialist service page.
Slow drains and the sewer line
Slow drains, gurgling fixtures and a toilet that does not flush well may point to a clog or to a problem in the main line. An inspector rarely scopes the sewer, and a sewer line problem is one of the more expensive surprises after closing. A camera inspection is a separate, optional service that shows the condition of the line. See our page on plumbing camera inspection.
Gas piping
Inspectors note gas appliances with no shutoff valve within reach, flexible connectors that are old, kinked or the wrong type, unsupported pipe and lines that look like additions. Gas is a safety item. If you find any of these on a report, treat them as priority and see our gas line repair page.
Missing or stuck shutoff valves
A toilet or sink with no shutoff valve, or one that will not turn, is common and cheap to fix. It is worth putting on the repair request, because you will want those valves the first time something leaks.
Water pressure
Very high pressure strains fixtures and appliances, and a pressure regulator is the fix. Very low pressure points to corroded pipe, a partly closed valve or a clogged fixture. The inspector's finding tells you which way it leans.
Fix now, fix soon, or note
| Finding | Usually | Why |
|---|---|---|
| Active leak, wet or stained ceiling, soft floor | Fix now | Damage continues until it is fixed |
| Relief valve or discharge pipe missing or wrong | Fix now | Safety item |
| Gas appliance with no shutoff or an old connector | Fix now | Safety item |
| Water heater with corrosion at connections | Fix soon | Leak is likely |
| Old galvanized pipe, polybutylene | Evaluate | The answer depends on condition |
| Slow main drain, sewer concern | Evaluate, scope if buying | Expensive if missed |
| Missing shutoff valves | Fix soon | Cheap, and you will want them |
| Cosmetic items, loose escutcheons | Note | Low priority |
For buyers: how to use the report
Pick the items you want the seller to address, and ask a plumber to price each one before you decide. A price per item lets you choose which go on a repair request and which you are happy to take on. If the report says "recommend evaluation," get the evaluation before the option period ends, not afterward.
Ask whether you can see the house for the plumber's visit. If you do not own it yet, the seller or the agent has to arrange access, and it takes time. Tell the plumber the date you are working to.
For sellers: how to use the report
If you have an inspection before listing, fixing the plumbing items first removes them from negotiation. Small repairs completed with a written work order and invoice are cheap insurance against a buyer's request later. If the report is the buyer's, address the items the buyer has asked for, and keep the invoices to hand.
Frequently asked questions
Which plumbing items should I put on a repair request?
Leaks, anything unsafe such as a missing relief discharge pipe or a gas shutoff, a water heater with corrosion, and missing shutoff valves are the usual priorities. For old pipe or a sewer concern, get an evaluation before deciding. A plumber's price for each item helps you decide.
Do I need a plumber for every item on the report?
No. Cosmetic and maintenance items are often fine to ignore or handle yourself. Anything that leaks, involves gas, the water heater or the sewer deserves a licensed plumber.
Should I get a sewer camera inspection before buying?
It is worth considering, especially for an older house or one with large trees in the yard. A standard inspection does not look inside the sewer. A camera shows the condition of the line, and finding a problem before closing gives you options afterwards.
The report says "recommend evaluation by a licensed plumber." Is that bad?
Not necessarily. It means the inspector saw something they cannot fully judge. The evaluation may find nothing, or a simple repair, or a bigger job. It is a question that needs an answer before you close.
Can a plumber give me a quote before I own the house?
A plumber can price from the report and photos. To see the house, the seller or the agent has to arrange access. Tell the plumber the date you are working to.
Does polybutylene pipe need to be replaced?
It depends on the condition of the pipe and on your insurer. Some homes with polybutylene have had no problems, and others have had failures. A plumber can look at what is in your house and tell you whether a repipe is the honest answer.
Licensed Houston plumbers since 2007. Residential, commercial and industrial plumbing. Upfront pricing, no hidden charges.
