Polybutylene Pipes in Arlington Homes: How to Spot Them and What to Do

Polybutylene is a gray, flexible plastic water pipe that was widely used in homes built from about the late 1970s to the mid-1990s. It was cheap and easy to install, but it became known for failing early, often at the fittings. Arlington grew quickly in those years, so many homes here may still have it. If you think you have polybutylene and see signs of a leak, call (817) 285-5426.

How do I know if I have polybutylene pipe?

Look where pipes are exposed: at the water heater, under sinks, near the main shut-off and in the attic. Polybutylene is usually gray, sometimes blue or black, and is often marked "PB2110". It is joined with plastic or metal crimp rings. Copper is orange-brown, and PEX is usually red, blue or white and marked "PEX".

• Gray flexible pipe, about half an inch to one inch wide
• Printed code "PB2110" on the pipe
• Copper or aluminum crimp bands at fittings
• Home built roughly from 1978 to 1995

Short pieces at the sink or toilet may be newer replacement parts, so check more than one spot. A plumber or inspector can confirm what you have.

Why does polybutylene leak?

Over time, the pipe and some of its fittings can break down, especially with chlorine in city water. The pipe can turn brittle and crack from the inside, and fittings can fail. Leaks often come with little warning and can be large.

That is why many insurers ask about polybutylene, and some may charge more or limit coverage. Check with your agent. Our article on whether insurance covers water leaks in Texas explains the basics.

What are the signs of a polybutylene leak?

The signs are the same as other hidden leaks: a higher water bill, damp drywall or ceiling stains, water at the base of walls, warm or wet spots on the floor, and a water meter that moves when nothing is on. In attic runs, a leak may show first as a ceiling stain.

See our guides to a water leak in a wall or ceiling and the musty smell of a hidden leak.

Should I replace polybutylene pipe?

Many homeowners choose to replace it before it fails, often with PEX or copper. Replacing it is called a repipe. If you are not ready for that, keep an eye on exposed fittings, know where your main shut-off is and test your water meter often. Fix any leak right away.

1. Find out where your pipes are polybutylene.
2. Learn where your main water shut-off is.
3. Check exposed fittings for drips or white crust.
4. Do a water meter test every few months.
5. Get quotes for a repipe if you plan to stay in the home.

Our main shut-off guide shows how to turn off your water fast.

How much does leak detection cost in Arlington?

A basic leak detection visit usually costs $150 to $400, and slab leak detection about $250 to $600. A repipe is quoted for your home, since it depends on the size of the house and how the lines run. You get the price before work starts.

General estimates for Arlington, TX in 2026. Your exact price is confirmed before any work begins.

Compare a spot repair, a reroute and a full repipe on our slab leak repair page.