Whole House Repipe in San Antonio — PEX Repiping Done Right

There are three houses in the NE San Antonio metro that eventually face this decision. The slab-leak house: copper lines under a slab-on-grade foundation, flexed and abraded for decades by expansive Blackland clay soil that swells and shrinks with every wet-dry cycle, springing leak after leak in new spots. The galvanized house: pre-1970s steel pipe rusted shut from the inside, delivering brown water at half pressure. And the polybutylene house: 1980s Qest gray pipe with fittings that fail without warning — a material so unreliable it triggered a national class-action settlement. Hill Country Plumbing Pros repipes all three across Schertz, Universal City, Converse, New Braunfels, Seguin, and beyond.

Our standard approach is a copper to PEX repipe rerouted overhead: abandon the under-slab lines entirely and run new PEX-A through the attic, dropping down inside walls to each fixture. PEX-A is the right material for this soil and this climate — it flexes with foundation movement instead of fighting it, uses expansion fittings with far fewer joints than copper, tolerates our hard water without pinhole corrosion, and handles freezes far better than rigid pipe, which mattered enormously in January 2026. Most homes take two to four days, water stays on each night, and we coordinate the drywall patching so you are not left staring at open walls.

What’s Included

• Full inspection and a fixed, written repipe quote — no allowances or surprises
• PEX-A repiping with expansion fittings and a manifold or trunk-and-branch layout
• Overhead attic reroute abandoning failure-prone under-slab lines
• New quarter-turn shutoff valves at every fixture
• Insulated attic runs for freeze protection on every exposed line
• Permits, city inspection, and coordinated drywall patching
• Water on every evening — no nights in a hotel for a standard repipe

How It Works

1. Assess and quoteWe inspect the existing system, count fixtures, and map the reroute, then hand you a fixed price with the timeline in writing.
2. Run the new systemNew PEX-A lines go through the attic and down the walls with precise access openings — small, planned cuts, not demolition.
3. Switch over and testFixtures move to the new piping one section at a time, the old lines are abandoned in place, and the whole system is pressure-tested and inspected.
4. Close the wallsDrywall patches are coordinated to texture-match, and we walk the house with you checking pressure and hot-water delivery at every fixture.

What It Costs

A whole house repipe in the San Antonio metro runs $4,500 to $15,000 in 2026. A one-story, two-bath home with attic access sits toward the lower half of that range; larger two-story homes, three-plus baths, and difficult access push toward the top. Fixture count drives repipe house cost more than square footage — every sink, toilet, tub, and hose bib is a line that must be run.

Weigh that against the alternative: slab leak repairs in this area commonly run $1,500 to $4,000 each, and clay-soil movement means a second and third leak are usually coming. Insurers increasingly non-renew policies after repeat slab claims. If you are on your second leak — or your home still has polybutylene — the repipe is almost always the cheaper decade.

$4,500–$15,000 by home size · fixed written quote before work begins

What moves the price

• Fixture count and number of bathrooms
• One story vs. two, and attic accessibility for the reroute
• Drywall access openings required and finish-matching complexity
• Existing material — galvanized and polybutylene removals vs. copper abandonment

📘 Related guide: Signs of a slab leak (and repipe costs)