McLean homes built from the 1950s through the 1980s often contain galvanized steel or early copper runs that corrode from the inside out, especially in neighborhoods like Pimmit Hills and Langley where tree roots and shifting clay soils put constant pressure on joints. When a burst occurs near Tysons Corner Center or along the Route 123 corridor, we map the affected section with camera inspection before deciding whether a targeted copper or PEX replacement will hold or whether the line needs to run back to the main shutoff. Fairfax County plumbing code requires dielectric unions when transitioning metals and proper sleeving where pipe passes through concrete, details that prevent future electrolysis failures common in the area’s humid subtropical conditions.
Slab leaks are frequent in ranch-style homes around McLean Community Center because the original copper was laid directly on grade without proper expansion loops. Once we locate the leak with acoustic equipment, we isolate the run, install a new PEX line through the wall or attic chase, and pressure-test at 100 psi before restoring drywall. Homeowners in nearby Falls Church and Arlington often ask about whole-house repiping versus spot fixes; we explain that mixing old galvanized sections with new PEX creates turbulence points that accelerate corrosion downstream, so we document every transition for future reference.
Winter cold snaps, even brief ones, can split aging lines in unconditioned crawl spaces common in Downtown McLean properties. We route new supply lines above the insulation plane and add shutoff valves at each fixture so future repairs do not require shutting off the entire house. Access challenges around Langley CIA Headquarters properties often mean working from exterior hose bibs or through finished basements, requiring dust containment and careful restoration of original plaster or paneling.
Technician insight
In McLean, the thing that catches most people out with Pipe Replacement is discovering that 1970s homes in Tysons Corner and Langley still have sections of galvanized pipe feeding copper, creating hidden electrolysis points that fail again within months if left in place.
Pimmit Hills Slab Leak
A homeowner in Pimmit Hills noticed warm floors and dropping pressure. Camera inspection revealed a pinhole in 1972 copper under the slab. We isolated the run, installed a new PEX bypass through the attic, pressure-tested, and restored service the same afternoon without cutting the concrete.
Pipe Replacement Services We Offer
✓Targeted Copper Pipe Replacement
Replace corroded copper sections with new Type L copper using press or sweat fittings to restore flow without disturbing unaffected runs.
✓PEX Repiping in Finished Spaces
Install Uponor or similar PEX through existing access points or minimal wall openings, ideal for McLean homes where preserving drywall and tile is a priority.
✓Galvanized Steel Line Removal
Cut out and dispose of failing galvanized pipe, replacing it with code-compliant materials to eliminate rust and low-flow issues common in 1960s Fairfax County homes.
✓Slab Leak Pipe Bypass
Reroute supply lines above slab in homes near Tysons Corner and Pimmit Hills where excavation under finished flooring is impractical.
✓Kitchen and Bath Supply Line Upgrade
Replace brittle supply lines under sinks and behind fixtures with new shutoff valves and flexible connectors rated for local water pressure.
Pipe Replacement Cost in McLean, VA
| Service | Typical Range | What Affects It |
|---|---|---|
| Targeted Copper Replacement (under 20 ft) | $650–$1,200 | Varies with wall access and number of fittings |
| PEX Repipe Single Bath | $1,800–$3,200 | Includes new shutoffs and fixture connections |
| Slab Leak Bypass | $2,400–$4,100 | Higher when attic or exterior routing is required |
| Galvanized Removal and PEX Swap | $3,500–$6,800 | Depends on home age and total linear feet in Pimmit Hills or Langley properties |
Ranges are typical for McLean, VA and confirmed with an exact written quote before any work starts.
How it works
- 1
On-Site Assessment
We arrive within the posted hours, shut off water at the meter if needed, and use camera and pressure testing to map the exact length and material of pipe requiring replacement.
- 2
Access and Isolation
We open the smallest necessary access points in walls or ceilings, isolate the run, and protect flooring and furnishings common in McLean residences.
- 3
New Pipe Installation
New copper or PEX is run, supported per code, and tied into existing lines with proper dielectric protection where metals meet.
- 4
Testing and Restoration
We pressure-test the new section, check for leaks at every joint, then close access points and return water service.
Pricing
Cost depends on pipe material, linear footage, and whether access requires opening finished walls or working in crawl spaces typical of McLean homes.