# Repiping in Round Rock, TX, Where the Water Runs Very Hard

> Repiping in Round Rock, TX: very hard city water, a one-permit system that names the plumbing contractor, and 1970s-80s houses with original supply pipe.

URL: https://gracklerepipingaustin.com/service-areas/round-rock/

## What starts a repipe in Round Rock

Ticket A

Hard water

### Crusted aerators and a water heater full of scale

Round Rock reports very hard water. Scale settles in valves, cartridges and water heaters, and it is the first thing to separate from a pipe problem.

Ticket B

1970s-80s

### A house from the city's first growth wave

About one in five Round Rock homes was built from 1970 to 1989, so original supply pipe and fittings in those houses are now decades old.

Ticket C

Slab

### A second slab leak in the same house

Parts of Round Rock sit on Houston Black clay. When a slab leak repeats, rerouting the line overhead often makes more sense than another floor repair.

Ticket D

MUD

### A house in Chandler Creek or Vista Oaks

Round Rock's permit rule reaches the Chandler Creek and Vista Oaks MUDs too, so a repipe there is permitted through the City.

## Services in Round Rock

### Whole-house repiping

Every hot and cold supply line from the main shutoff to the fixtures replaced, permitted under Austin's plumbing code, pressure tested and patched.

Details →

### Slab leak reroutes

A leaking water line under the slab is confirmed, capped and abandoned, then replaced with a new line run overhead through the attic and down the walls.

Details →

### PEX repiping

A whole-house or partial repipe in PEX tubing, with the tubing type, fittings and layout chosen for the house and run to Austin's attic and pressure rules.

Details →

### Polybutylene replacement

Gray polybutylene supply pipe identified, then replaced throughout the house with PEX or copper, separate from Austin Water's work on its own service lines.

Details →

### Partial repiping

One bathroom, one branch or one failing run replaced with new pipe, with a written boundary that shows exactly which old pipe stays in the house.

Details →

Round Rock’s own water report describes its water as very hard: an average of 249 mg/L, or roughly 14.6 grains per gallon. That is about 2.7 times the 93 ppm average Austin Water reports, and it shapes nearly every plumbing decision in the city. [Grackle Repiping Austin](https://gracklerepipingaustin.com/) offers and manages repiping in Round Rock, from Round Rock West and Chandler Creek to Forest Creek and Teravista, with the work done by licensed and insured plumbing contractors. For repiping in Round Rock, TX, the job starts by separating what hard water has done to valves and fixtures from what age or the ground has done to the pipe itself.

## Very hard water, and what a repipe can and cannot change

Round Rock blends three supplies: Lake Georgetown, Edwards Aquifer groundwater and Lake Travis water treated at the Brushy Creek Regional plant. The City’s water quality table shows hardness ranging from 100 to 358 ppm across the year, calcium averaging 70 ppm and a pH around 7.5. The disinfectant is chloramine.

Calcium carbonate drops out of hard water when it heats up or slows down. So the first deposits show up in the water heater, the mixing valves in showers and the aerators on faucets, not in the straight runs of pipe. A shower that loses flow in Round Rock is as likely to have a scaled cartridge as a restricted line, and the fix is very different. The [hard water guide](https://gracklerepipingaustin.com/guide/austin-hard-water-and-pipes/) walks through how to tell them apart.

A repipe clears the scale that has built up inside old lines and old fittings, and new PEX or copper gives a smooth bore. It does not soften the water, and the same 249 mg/L keeps arriving at the meter the day after the job is done. That is why the layout of a Round Rock repipe deserves a decision about treatment: whether an existing softener or filter loop is reconnected, bypassed or planned for later, and where its connections sit so they stay serviceable. Material choice belongs in the same conversation; the [PEX repiping page](https://gracklerepipingaustin.com/pex-repiping/) and [copper repiping page](https://gracklerepipingaustin.com/copper-repiping/) cover how each handles fittings, joints and access.

## One permit, every contractor named on it

Round Rock’s Building Inspection division requires a permit for the installation, alteration, repair or replacement of any plumbing system within city limits, and the same rule covers the Chandler Creek and Vista Oaks MUDs. The City runs a strict one-permit system: every contractor working on the project is listed on the single permit, and contractors must register with the City before they can be listed.

The City adopted the 2024 International Plumbing Code, not the Uniform Plumbing Code Austin uses. Austin’s local amendments, including its 65 psi regulator rule, do not apply here; pressure control on a Round Rock repipe follows the code Round Rock enforces, and the details are confirmed with the permit. The standalone plumbing trade permit is $50, with two inspections of the same type included. The City does not say on that page whether a whole-house repipe is filed as a standalone permit, so the permit type is confirmed when it is pulled. The estimate lists the permit, the pressure test and the wall patching as separate lines.

## Where the 1970s and 1980s houses fit

Round Rock holds the largest block of 1970s and 1980s housing among the Austin suburbs. Of its 51,143 homes, 21.6% were built from 1970 to 1989, and 10.5% predate 1980, according to the Census Bureau’s American Community Survey. The median house dates from 2002, so the city is mostly newer, but a house built in those two decades is now thirty-five to fifty-five years into its original plumbing, and any repairs since then have been made against hard water the whole time.

Houses of that age can hold almost anything: copper, older plastic lines, or a patchwork of both after earlier repairs. The [guide to identifying your pipes](https://gracklerepipingaustin.com/guide/what-kind-of-pipes-do-i-have/) shows what to look for at the water heater and under sinks. Where a house turns out to have polybutylene, the [polybutylene pipe replacement page](https://gracklerepipingaustin.com/polybutylene-pipe-replacement/) explains the scope; where most of the system is sound, a [partial repipe](https://gracklerepipingaustin.com/partial-repiping/) can target the failing branches and leave the rest written into the scope.

## Clay at three of nine sample points

A federal soil survey sample around Round Rock found high shrink-swell soils at three of nine points, mostly Houston Black and Sunev clays. Expansive clay swells when wet and shrinks in drought, and a slab sitting on it moves with the seasons. Water lines poured into or under that slab move with it, and joints and fittings are where the strain tends to show.

Homeowners in the area report repeat slab leaks in the same house and the worry that each one means foundation trouble. A leak in a supply line does not by itself prove the foundation is failing, but a second or third leak changes the math. Instead of breaking the floor again, the line can be abandoned in the slab and replaced with a new run through the attic and down a wall. The [slab leak reroute page](https://gracklerepipingaustin.com/slab-leak-reroute/) covers how that works, and the [repair or reroute guide](https://gracklerepipingaustin.com/guide/slab-leak-repair-or-reroute/) compares the two paths.

## A Round Rock job, permit to patch

The first visit checks what the pipe is made of at several points, measures static pressure at a hose bib, looks at attic access and decides where walls can open with the least patching. In a one-story slab house, the new hot and cold lines usually run through the attic and drop to each fixture group. Attic runs need insulation, and the February 2021 storm showed central Texas what an uninsulated attic line does in a hard freeze; the [guide to PEX in Texas attics](https://gracklerepipingaustin.com/guide/pex-in-attic-texas/) covers routing and protection.

Water is back on at the end of each work day. When the new system is complete, it is pressure tested, then inspected by the City before any wall closes. Old pipe that can be reached is removed; pipe left in the slab or inside closed walls is capped and abandoned in place. The new lines are flushed after cutover, which matters more in hard water, because loosened scale from old fittings and the water heater can lodge in new valves. The [whole-house repiping page](https://gracklerepipingaustin.com/whole-house-repiping/) covers the full sequence, and the [repipe cost guide](https://gracklerepipingaustin.com/guide/repipe-cost-austin/) explains what moves the price.

## Round Rock’s water, its neighbors and the service line

Round Rock’s water report points customers to the City’s service line inventory and explains which part of the line the City owns and which part belongs to the customer. No free replacement program like Austin Water’s galvanized line program was found for Round Rock, so the line from the meter to the house is the owner’s to maintain. If it needs work, the [water line replacement page](https://gracklerepipingaustin.com/water-line-replacement/) covers that separate job.

North of the city, [Georgetown](https://gracklerepipingaustin.com/service-areas/georgetown/) has its own permit office and high operating pressure in parts of its system. To the west, [Cedar Park](https://gracklerepipingaustin.com/service-areas/cedar-park/) draws from Lake Travis without Austin-style softening. South along Interstate 35, [North Central Austin](https://gracklerepipingaustin.com/service-areas/north-central-austin/) is where older galvanized pipe drives the work. If the question is whether to repipe at all, the [guide on whether repiping is worth it](https://gracklerepipingaustin.com/guide/is-repiping-worth-it/) is a good place to start.

## Neighborhoods and coverage

- Old Town
- Round Rock West
- Chandler Creek
- Vista Oaks
- Forest Creek
- Teravista

### Landmarks

- Dell Diamond
- Old Settlers Park
- Round Rock Premium Outlets

### Routes

- Interstate 35
- State Highway 45
- Palm Valley Boulevard (US 79)
- A.W. Grimes Boulevard
- Louis Henna Boulevard

1. 1. Cedar Park
2. 2. East Austin
3. 3. Georgetown
4. 4. Kyle
5. 5. North Central Austin
6. 6. Northwest Austin
7. 7. Round Rock
8. 8. South Austin
9. 9. South Central Austin

## Round Rock questions

### What does a whole-house repipe cost in Round Rock?

A typical Austin-area range for a whole-house repipe is $4,500 to $15,000+, and about $4,500 to $9,000 for PEX with typical access. Round Rock's standalone plumbing permit is $50, though the City confirms which permit type a repipe files under. Slab homes needing long overhead runs, larger houses and copper push the price higher.

### Do I need a permit to repipe a house in Round Rock?

Yes. Round Rock requires a permit to repair, alter or replace any plumbing system inside city limits and in the Chandler Creek and Vista Oaks MUDs. The City runs a one-permit system, so every contractor on the job is listed on that permit and must be registered with the City.

### Will a repipe fix the scale problem in Round Rock water?

No. New pipe removes the scale already inside old lines, but the water entering the house is just as hard afterward. Round Rock reports an average hardness of 249 mg/L. Whether to add or reconnect a softener or filter is a separate decision best made while the new lines are being laid out.

### Does Round Rock replace service lines for free like Austin Water?

No such program was found. Round Rock's water report points customers to its service line inventory and explains which part of the line the City owns and which part the customer owns, but it does not describe a replacement program like Austin Water's galvanized line program.

### Can a Round Rock homeowner repipe their own house?

Round Rock's rules let homeowners do work on their own primary residence under the same permit and inspection requirements that apply to contractors. The permit, the pressure test and the inspection before walls close still apply.

## Related guides

- Learn [Does Austin have hard water, and what does it do to pipes?](https://gracklerepipingaustin.com/guide/austin-hard-water-and-pipes/)Austin Water delivers moderately hard, lime-softened water, while several suburbs deliver much harder water. This guide compares the utilities' own figures and explains what hardness, pH and disinfectant do to pipe, fixtures and water heaters.
- Decision Guide [Should a slab leak be repaired or rerouted?](https://gracklerepipingaustin.com/guide/slab-leak-repair-or-reroute/)Three ways to fix a leaking water line under a slab, and the conditions that make each one the sensible choice: how many leaks, what the pipe is, what is on the floor and what the attic allows.
- Cost Guide [How much does a repipe cost in Austin?](https://gracklerepipingaustin.com/guide/repipe-cost-austin/)What a whole-house repipe typically costs in the Austin area, what sits inside that price, and the handful of things that move one house from the low end to the high end.
- Learn [What kind of pipes does my house have?](https://gracklerepipingaustin.com/guide/what-kind-of-pipes-do-i-have/)You can identify most water pipe yourself in a few minutes by looking where it shows: the water heater, the main shutoff, under sinks and in the attic or crawlspace. This guide shows what each material looks like, what its age suggests and what each one tends to need.
- Decision Guide [Is repiping worth it, or should I keep fixing leaks?](https://gracklerepipingaustin.com/guide/is-repiping-worth-it/)Repiping is worth it when the pipe itself is the problem: leaks keep coming in different places, the material is known for failing, or the house is being bought or sold with it. When one line has failed in otherwise sound pipe, a repair or reroute is the better buy.

## Nearby service areas

- [Georgetown](https://gracklerepipingaustin.com/service-areas/georgetown/)80-100 psi operating pressure in parts of the system; City permits reach ETJ homes on Georgetown utilities
- [Cedar Park](https://gracklerepipingaustin.com/service-areas/cedar-park/)Lake Travis water without lime softening (183 ppm hardness) and permits under the 2021 IPC
- [North Central Austin](https://gracklerepipingaustin.com/service-areas/north-central-austin/)Postwar galvanized lines; Austin Water replaces flagged galvanized service lines