When patching stops making sense
Repiping in Apache Junction, AZ
Three slab leaks in four years is not bad luck. It is the rest of the system telling you what it plans to do next. Here is when a repipe is the cheaper answer.
Water re-pipes require a plumbing trade inspection from the city. That is part of the job, not an extra.
Repiping means replacing the water supply lines in a house rather than repairing them one failure at a time. In Apache Junction it usually takes the form of an overhead PEX reroute: new lines run through the attic and dropped down interior walls, with the old lines in the slab capped and abandoned in place.
It sounds drastic and it usually is not. On a slab home where the buried copper has started failing, a reroute avoids cutting concrete altogether, and it removes every future slab leak from the equation rather than removing the current one.
The hard part is knowing when you have crossed the line from sensible repair into throwing money at a system that has made up its mind. That threshold is what this page is about.
Second or third leak in the same house?
The threshold, stated plainly
There is no universal rule, but there are strong signals, and most homeowners here recognise several of them at once.
Signals that repiping is the better economics
- Two or more slab leaks in the same house, particularly on the hot side.
- Repeated pinhole leaks in accessible copper, which indicates the pipe wall is thinning throughout.
- CPVC that has gone brittle, where new failures appear near previous repairs.
- Galvanized supply lines still in service, which are well past their useful life and restrict flow as they corrode.
- A house being remodelled anyway, since walls that are already open remove most of the access cost.
- Water pressure that has dropped gradually across the whole house over years rather than suddenly.
If only one of those applies, a targeted pipe repair or a single slab leak repair is usually still the right call. Three of them together is a different conversation.
Why overhead PEX is the local default
The material choice is not fashion. It comes down to what fails here and how houses are built.
| Approach | Strengths | Trade offs |
|---|---|---|
| Overhead PEX reroute. | No slab cutting, fewer joints, flexible, tolerates hard water and movement. | Drywall access holes to patch, attic insulation required. |
| Copper repipe overhead. | Familiar, rigid, long service history. | More joints, higher material cost, same water chemistry as before. |
| Re run inside the slab. | Preserves original layout. | Puts new pipe back in the environment that destroyed the old. |
| Partial repipe. | Lower cost, targets the worst section. | Leaves the rest of the system on the same clock. |
The third row is the one worth arguing about. Putting new lines back into the slab reproduces the original problem, and in a house that has already produced two leaks it is rarely the right decision.
What happens in your house during the work
The sequence of a whole home reroute
- Walk and plan.Every fixture is mapped, the attic access is checked, and the drop points are marked so the drywall openings are planned rather than improvised.
- Permit.Water re-pipes require a plumbing trade inspection from the city's Division of Building Safety and Inspection, so the permit comes first.
- Run the new lines.Manifold or trunk and branch through the attic, insulated, with drops to each fixture group.
- Tie in and test.New lines connected, pressure tested, and inspected before anything is closed up.
- Abandon the old.The slab lines are capped and left in place. Nothing is dug up unless there is a specific reason.
- Patch and finish.Drywall repairs and texture, which is the visible part of the job and worth agreeing in writing up front.
Most homes are usable through the process, with water off for parts of the day rather than for days at a time. Ask for the daily schedule at the start, particularly if the house is occupied by people who cannot easily be without water.
Deciding between one more repair and doing it properly? Call (480) 806-2944.
Costs, disruption and the questions to ask a contractor
Repipe pricing depends on the number of fixtures, the number of storeys, attic access, and whether drywall finishing is included. Any quote should state all four.
Ask every bidder the same five questions
Is the permit and the city inspection included, and who schedules it? Water re-pipes are inspected work here.
Does the price include drywall patching and texture, or only the plumbing? This is the most common gap between two quotes that look similar.
Is the new pipe insulated in the attic, and what is used at the drops? Attic temperatures in this city are extreme and insulation is not optional.
What happens to the abandoned slab lines, and are they capped properly at both ends?
What is the warranty on labour, and what is the manufacturer warranty on the pipe and fittings?
A contractor who answers all five clearly is usually the one to hire, regardless of which of them is cheapest by a few percent.
What to do while a repipe is in progress
A repipe turns a lived in house into a short term work site. A few simple precautions keep it uneventful.
What to do during the work
- Confirm each day when the water will be off and when it will be back, so nobody is caught out.
- Keep children and pets away from open wall cavities and from any area where cutting is happening.
- Expect dust, and move or cover anything that matters in the rooms being opened.
- Do not use a fixture that has been disconnected, even if the handle still turns.
- Run every tap for a few minutes once the system is back, to clear air and any debris.
- Ask for the pressure test and inspection sign off before the walls are closed up.
Repiping questions from owners of older slab homes
How long does a whole home repipe take?
For a typical single storey home here, it is commonly a small number of working days for the plumbing, plus inspection scheduling and drywall finishing afterwards.
Larger homes, two storeys and difficult attic access extend it. The plumbing is usually faster than people expect and the finishing takes longer.
Do you have to cut holes in every wall?
No. Access is needed at drop points and at fixture groups, not along the whole run, because the horizontal distance is covered in the attic.
A careful plan minimises the number of openings, and those openings are placed where patching is simplest.
Is PEX safe for drinking water?
PEX is an accepted potable water material under the codes in use here and is used extensively across Arizona. It handles hard water and thermal movement well, which is precisely why it has become the standard for reroutes.
Can I repipe part of the house now and the rest later?
Yes, and it is sometimes the right budget decision, particularly if the hot side is failing and the cold side is sound.
Be clear that it is a staged project rather than a finished one, and agree the sequence in advance so the second phase is not more expensive than it needed to be.
Will a repipe fix my water pressure?
If the pressure loss is from corroded galvanized pipe or heavily scaled lines, yes, noticeably.
If the cause is a failing pressure regulator or a supply side issue, repiping will not change it, which is why testing first matters. That falls under diagnostic work rather than replacement.
Local code, licensing and how this page is maintained
Repiping in Apache Junction falls under the 2018 International Plumbing Code. The City Council adopted that code as the Apache Junction Plumbing Code in 2019, along with local amendments to the fixture flow rate table. The city also enforces the 2018 IRC, IBC and IFGC and the 2017 NEC. Addresses outside the city limit, including Gold Canyon, are permitted and inspected through Pinal County instead.
Arizona plumbing contractors are licensed by the Registrar of Contractors. Plumbing falls under the C-37, R-37 and CR-37 classifications, and septic work under CR-41. Verify any contractor at roc.az.gov before work begins. The standards and guidelines summarised here are general, and the building department for your address is the authority on what applies to your job.
Written and reviewed by the Plumbing Guys Apache Junction team. Last updated 2026-09-06.
Work out whether this is repair number three or the last one
Call and tell us the history: how many leaks, where, and how old the house is. That history is usually enough for an honest recommendation, including when the answer is not to repipe yet.