Many Fullerton homes still run on the supply lines they were built with in the 1950s, 60s or 70s. When those lines start to leak, the first one is usually repaired. When a second or third leak follows, owners naturally ask whether they are paying to patch a system that is wearing out everywhere.
A repipe is a bigger project than any single repair, so it deserves evidence rather than a guess. The goal of this guide is to help you recognize when the question is worth asking and what to look for in the answer.
Signs the whole system may be wearing out
- Two or more slab leaks, especially in different spots.
- The plumber reports thin, pitted or corroded pipe at the leak site, not just one rub spot.
- Galvanized steel supply lines with low pressure or discolored water.
- Pinhole leaks in exposed copper under sinks or at the water heater.
- You plan major remodeling that will open walls and ceilings anyway.
- The leak is in a spot where any repair would be very disruptive.
Repair again or repipe?
- IfFirst leak, pipe at the break looks soundThenA spot repair or reroute of that line is usually the reasonable step.
- IfSecond leak on the same lineThenAsk about rerouting that whole line rather than patching another section.
- IfLeaks on different lines, or worn pipe seen at each repairThenAsk for a repipe assessment and compare it with continued repairs.
- IfGalvanized supply lines throughoutThenAsk how much life the plumber expects from them and whether a repipe should be planned.
How a repipe is usually done in a slab home
Because the slab cannot easily be reopened along every line, repipes in slab homes are commonly run above the floor: up through walls, across the attic and down to each fixture. The old under-slab lines are capped and abandoned. Common materials include copper and PEX, and the plumber should explain why they recommend one over the other for your house.
Expect small openings in drywall at fixtures and along the route, a period with water off on each work day, and patching afterward. Ask whether drywall repair and paint are in the scope or a separate trade.
What to compare between repipe proposals
| Item | Why it matters |
|---|---|
| Pipe material | Affects how the lines are run and connected; ask why it was chosen. |
| Fixtures included | Confirm every sink, tub, shower, toilet, hose bib and the water heater connection. |
| Route | Where lines run through the attic and walls, and how they are protected. |
| Openings and patching | Who closes walls and ceilings, and whether paint is included. |
| Permit | Whether the City of Fullerton requires one for this work and who pulls it. |
| Water off time | How many days and how many hours per day you will be without water. |
Common questions
Does a repipe include the drain lines?
Usually not. A repipe typically refers to the water supply lines. Sewer and drain lines under the slab are a separate system with separate inspection methods.
Can we stay in the house during a repipe?
Many owners do, with water off during parts of each work day. Ask the contractor how they schedule water service.
Is PEX or copper better?
Both are widely used. The right choice depends on the house and the plumber's approach; ask for their reasoning and any code requirements that apply.
General information for Fullerton, not a quote or professional advice. In an emergency, call 911.