Repipe Final Inspection Checklist: Test Before You Sign
Quick Answer: A repipe final inspection means running every fixture hot and cold, loading several at once, turning every new valve, checking aerators and the water heater, walking the access openings, and collecting the photographs and any permit record before you sign.
The last hour of the last day has a feel of its own. Tools are going back on the truck, drop cloths are folded, and a clipboard comes across to you with a line at the bottom for your name. The house has water again, and everything works as far as anyone in the kitchen can tell.
That hour is the only one of its kind. The ladder is still up, the spare fittings are in the truck, and everyone who knows which line goes where is within earshot. A problem found now takes minutes from someone already holding the tool. The same problem two weeks later is a phone call, a scheduled visit, and a morning of your time.
So the walkthrough belongs inside that hour, before the signature rather than after it. Not because anybody needs watching. Because that is the one moment when everything is still easy to correct.
What the Walkthrough Is For, and What It Is Not
Before the walls closed, every new joint was put under pressure with somebody looking at it, and any inspection was timed to that same open window. Those checks answer one question: does the system hold.
The walkthrough answers a different one: Is the system finished? A line can hold pressure perfectly and still arrive at a sink with hot on the right, or push construction grit into an aerator screen. None of that registers on a gauge. All of it shows up the first time somebody uses the house normally, which is what a walkthrough is: the first normal use, with the crew still in the driveway. Good crews expect it and lead it: asking for the walk is not doubt about the work; it is the last step of the work.
Run Every Fixture, Hot and Cold
At each fixture, run the cold, then the hot, and give the hot side long enough to actually turn hot rather than just feel warm. Do it at every sink, every tub spout, every shower, and the laundry valves.
What running both sides catches: orientation. Two new lines arrive at every fixture, connected by hand at each stop. Hot belongs on the left at a two-handle fixture, and a single-lever fixture should move toward hot the way its maker intended. A crossed pair is usually not a fault in the pipe, but two connectors swapped at the stop, which takes about as long to fix as it took to find. Occasionally, it is the two drops themselves, reversed above a closed ceiling, which is a longer job and a better thing to learn while the crew is still here.
What waiting for genuine hot catches: whether the fixture is tied to the hot side at all, and whether anything is mixing before it gets there. A hot tap lands on the cold run; it runs cold and stays cold, however long you leave it. Warm that never becomes hot is a different fault, because warm means the two sides are meeting somewhere: a mixing cartridge that failed or was set low, an anti-scald limiter holding it down, or a connection joining hot to cold upstream of the fixture. At a shower, sweep the valve from full cold to full hot and work the diverter both ways.
Then Open Several at Once
One fixture at a time proves each line is connected. It says nothing about what the house does under load, and load is the condition people complain about months later.
Ask for two showers running, then a laundry fill, then the kitchen tap, and stand at the shower farthest from the water heater. Some drop is normal. What you are watching for is a fixture that falls off sharply, or swings in temperature, the moment another draw opens: a stop left partly closed, or a branch carrying more than it was sized to carry. Both are settled at a fitting somebody on site can still find.
Turn Every Valve, Including the Main
New angle stops sit under every sink and behind every toilet, and they share one quality: nobody has ever closed one. They went in open, and the system was filled through them.
Turn each stop shut and open again: A valve can hold water in the position it was installed in and still fail to seal when asked to close, and closing it is the only way to learn which one you have. The stop under a sink is what you reach for at two in the morning when a connector lets go, and that is a poor time to learn it spins without stopping anything.
Then wipe underneath with a dry paper towel: A new joint that is going to seep rarely drips on day one. It beads, and a dry towel finds a bead the eye passes over.
Run the fixture first so the connection has carried working pressure, then wipe the stop body, the nut, and both ends of the connector with a dry paper towel. A joint that will seep beads before it drips.
Then close the main and prove it: Open a fixture on the lowest level and confirm the flow stops instead of trailing on, then open the valve fully again. The main is the valve least likely to have been turned in years.
A main shutoff that turns but no longer stops the water leaves you with no way to end a leak at two in the morning. Close it and prove the flow stops while a plumber is still in the room.
Look at the Aerators After the Flush
Cutting tubing, making up fittings, and filling a new system can loosen small material into the lines: shavings, crumbs of sealant, bits of the old system where the new work ties in. A crew flushes the lines before the fixtures go back on, which moves most of it out. Whatever survives collects at the first narrow point it reaches: the aerator screen and the face of a shower head.
Unscrew an aerator or two and look: A little grit is not bad news: it means the flush did its job and the screen caught the remainder. What matters is a screen loaded enough to be choking that fixture, because a faucet running weaker than its neighbors on the last day is usually a screen rather than a pipe. Mention the toilet fill valves and washing machine inlet screens too.
The Connections at the Edges of the System
Hose bibs, appliance lines, and the water heater sit at the ends of their own branches, and a walkthrough skips them more often than anything else.
Hose bibs: open each one fully and watch where it passes through the wall while water is moving, then close it and watch the flow stop. A bib that weeps at the wall is telling you about the connection behind the siding, not the spout.
Appliance connections: open the washing machine valves and check the valve bodies and hoses behind the machine; check the connection behind the refrigerator and confirm the ice maker fills; run a short dishwasher cycle so someone checks under that sink.
The water heater: new connectors at the cold inlet and hot outlet, isolation valves that turn, and no drip at either union after the system has run hot. The unit should sit level and secure, since a heater set back slightly off level, or with a strap left loose, is visible from the closet doorway. What came off goes back: the relief line runs downhill to where it discharged before, the drain pan is clear, and the expansion tank is supported rather than hanging on the piping.
Walk the Access Openings Against the Scope
Go room by room and count the openings cut to reach the pipe. Then find the sentence in your written scope describing what happens to them, and check every opening against the step that sentence stops at: cut, patched, taped, textured, painted.
All of those are legitimate places for a scope to end, and plenty of homeowners keep the closing work separate on purpose. What should not happen is an opening finished to a step nobody named. An access panel meant to stay should look like a panel rather than an unclosed hole.
The Packet You Should Be Handed
Four things, and the last one matters more than it sounds like it should.
The permit and the signed-off inspection, where a permit applies: Ask whether a permit was pulled on your job, since whether one was needed is your building department's call rather than the crew's. Where it was, a permit opened, and a permit signed off are two different pieces of paper, and the second stays attached to the property and answers the question a buyer's inspector will ask about new pipe.
A materials record. What went into the walls: the tubing maker and type, the sizes used, and the fitting system the crew is tooled for. On a page, it takes one line.
The warranties, named separately: One comes from whoever installed the system and one from whoever made the tubing and fittings. They run for different lengths, and they are not answered by the same phone call, so both belong in writing with a name against each.
The photographs taken before the walls closed: Because the new system runs overhead rather than back where the old one was, nothing marks that route once the ceilings close. A light fixture going in, a remodel years out, a stain traced back to the run above it: each goes better with photographs and worse without. The pictures are the only map anyone will ever have.
Take all four while the truck is still outside. A packet assembled on the last day exists. One requested a month later is a favor somebody has to go find.
The Checklist, and What Each Item Catches
| The check | What it catches | What a good answer looks like |
|---|---|---|
| Every fixture runs hot and cold | Crossed hot and cold, a tap on the wrong run, a mixing fault | Usually connectors swapped at the stop while you watch |
| Several fixtures open at once | A stop partly closed, a branch carrying too much | The fitting opened to prove the reason given |
| Angle stops turned, then wiped dry | A valve that will not seal, a joint starting to seep | The stop is changed that afternoon, not added to a list |
| The main shutoff actually closed | A main that turns but no longer stops water | You are shown where it is and what renewing it takes |
| Aerators and shower heads opened | Debris that survived the flush | Screens cleared, and the line flushed again |
| Bibs, appliance lines, water heater | A weeping bib, a heater off level, a moved relief line | Each run in front of you and left dry and secure |
| Openings counted against the scope | An opening finished to a step nobody agreed to | The scope sentence read out with you, opening by opening |
| The packet handed over | Any permit left unsigned, photographs nobody kept | The folder exists on the last day, not on request |
One principle sits under every line of that table, and it has nothing to do with trusting anyone: a repipe stops being easy to correct the moment the crew drives away. Not impossible and not a fight, just slower and dependent on somebody else's calendar.
So put the walkthrough on the schedule as its own event, agreed at the start of the project and not improvised at the end. Work down the checks in the order above and write out anything that is not settled in front of you. What you sign at the bottom of that hour is a list you have emptied yourself.
Frequently Asked Questions
Plan on the better part of an hour, which is longer than most people expect and shorter than it feels once you are running fixture after fixture. The person who ran the job should walk it with you, since a fixture reconnected at nine that morning is remembered best by whoever reconnected it. Carry a flashlight and a few dry paper towels. If the last day runs late and the daylight goes, walk it the next morning rather than walking it badly.
What is on you before the walls close is what nobody can add afterward. Ask that the photographs cover the trunk route and the drops rather than a single tidy section, and that each frame include something that identifies the room. Two other things are visible only then: metal protection plates where tubing passes through framing, which stop a future screw from finding a line, and insulation on hot runs crossing an attic.
Beyond the permit, the inspection, the material record and the photographs, ask for two small things while somebody is still on site. A labeled offcut of the tubing that went in, because its print line identifies the system for whoever opens a wall in ten years. And the name of the lead who ran the job alongside the license number. Some manufacturers set a window for registering a material warranty, so ask who files it.
It is ordinary, and writing a good one takes five minutes. Give every item a room, a fixture, and a plain description of what you observed, then date the list. Split it in two: items that keep the sign-off open, and items that can wait for a return visit. Both sides keep a copy, and the return date goes on the page rather than remaining a verbal promise. A list written that way tends to get finished, because there is nothing left on it to interpret.
Call the same day rather than waiting to see whether it develops, and photograph it before anyone touches it. Seeping at a new joint in the first weeks points to workmanship rather than wear, and a record of when it started keeps the conversation short. Meanwhile, close the angle stop under that fixture, or the main, if the wet spot is not at a fixture. Ask as well which date the workmanship coverage starts, since completion and sign-off are not always on the same day, and that date determines when the window closes at the far end.
Give it a week of ordinary use, then repeat the short version once. Heat cycling and vibration are what expose a connection that was almost right, so a second look is more useful after the house has run hot showers and laundry a few times. Open the cabinet under every sink again, glance at the ceilings below any run crossing the attic, and use the fixture nobody uses, usually a guest bath.
Book a repipe sign-off walkthrough with a licensed plumber — every fixture run, every valve turned, and the record, the photographs, and any permit your job carried, handed over before you sign. Ser Plumbing repipes homes across the area, from repiping in Downey to Long Beach. Call (310) 953-3566.
