Pipe materials decide how a leak starts and how it is found. Galvanized rusts from the inside. Copper pinholes under slabs. Polybutylene installed from 1978 to 1995 fails without warning. This guide names each material, how it fails, and which test finds it, so you know what the report means when it names your pipe.
How do I tell what pipe my home has?
Look at an exposed line near the water heater or the main shutoff. Galvanized looks gray and a magnet sticks to it. Copper looks reddish brown. Polybutylene looks gray plastic, often with copper-colored fittings. PEX looks like flexible plastic tubing in red, blue, or white. A photo of the line near the heater helps your leak detection expert confirm it before any test starts.
Your pipe materials show in one look at an exposed line near the water heater or the main shutoff, and the sections below take each material in turn.
Galvanized steel: rust from the inside
Galvanized is the oldest of the pipe materials in Citrus Heights homes. Galvanized lines show up in pre-1980s homes. The zinc coating wears away, and the steel underneath rusts from the inside out. Rust narrows the line, so pressure drops across the home and rust-colored water shows at first draw. A meter test still moves when a galvanized line leaks, but the pattern gives it away: low pressure at every fixture, not just one, plus brown water after the line sits unused.
Finding it takes a pressure check across the home and a meter test at the curb. The report names the material and the pattern, and your plumber decides what happens next.
Copper: pinholes under slabs
Copper is the most common of the pipe materials under Citrus Heights slabs. Copper supply lines cast into concrete slabs are the standard for 1970s homes here. After 40 to 50 years, corrosion thins the copper wall until a pinhole opens. Hard water at about 11 grains per gallon adds scale, and Fiddyment soil that swells when wet and shrinks when dry stresses the rigid line under the slab. The leak runs quiet for months, and the only sign is often a bill that climbs a little each month.
Sound and heat find it. Acoustic listening gear picks up the hiss of a pinhole under concrete. A thermal camera shows the warm patch where hot water escapes. A pressure test on the slab lines confirms which run loses water. The same pattern shows in leaks under concrete floors, where the mark goes on the floor above the break.
Polybutylene 1978–1995: fails without warning
Of all the pipe materials here, polybutylene is the most likely to fail without warning. Polybutylene is gray plastic supply pipe installed between 1978 and 1995, often with copper-colored fittings. It was common in homes of that era, and it fails at fittings and along the pipe with little warning. A line that held for decades can break open, and the break floods fast.
Finding a polybutylene leak starts with the meter test: a moving meter with every fixture off proves water is leaving. A pressure test narrows which run loses water. Visible runs near the heater and shutoff confirm the material. A full property inspection covers the case where the leak sits in a buried run and no visible line gives it away.
Durapex PEX: pinholes under slabs
Durapex belongs to the newer pipe materials, but pinholes still happen under slabs. Some PEX lines develop pinhole leaks under slabs, the same quiet pattern as copper. The leak runs slow, the floor shows a warm patch or nothing at all, and the bill climbs. Sound and heat find it the same way: acoustic listening on the slab, a thermal camera on the floor, and a pressure test to confirm the run.
Kitec: fittings fail first
Kitec is the pipe material where fittings fail before tubing. Kitec pairs PEX tubing with aluminum layers and brass fittings. The tubing holds up better than the fittings, which corrode and crack first. A Kitec failure often shows at a visible fitting near the heater or manifold before it shows in a wall. Check visible fittings for white or green crust, and note any fitting that weeps. A meter test proves whether water is leaving, and a pressure test narrows the run.
Orangeburg: sewer lines, not supply lines
Orangeburg is the only pipe material here that carries waste, not supply water. Orangeburg is a sewer-line material, not a supply-line material. It is bituminous fiber pipe, used for older sewer lines, and it softens and sags with age. A sagging Orangeburg line holds water, lets roots in through joints, and backs up at the lowest fixture. No pressure test applies to it, since drains carry no pressure.
A sewer video inspection finds it: the camera shows the sag, the roots, and the breaks on screen, and a sonde marks the spot and depth above ground. The report names the material and the damage, and your plumber plans the repair from it.
How pipe failure shows in Citrus Heights homes
The median Citrus Heights home was built around 1977, and most sit on concrete slabs. That puts galvanized lines past their reliable life, copper lines in the pinhole years, and polybutylene lines squarely in the 1978 to 1995 window. Fiddyment soil moves with the seasons, hard water runs about 11 grains per gallon, and both wear rigid pipe faster than soft ground and soft water would.
The test follows the pipe: meter, pressure, sound, heat, camera. See how a detection visit works for the order those tests run in, and what each one rules out.
That is the point of knowing your pipe materials: the material tells you how pipe failure will show, which test will find it, and what the report will name. When the report names a material, you know what failed and why the test that found it was the right one.
Frequently asked questions
How do I know if my home has polybutylene?
Look for gray plastic supply lines near the water heater or main shutoff, often with copper-colored fittings. Homes built or replumbed between 1978 and 1995 are the ones to check. A photo of the line helps confirm it.
Does pipe material change how a leak is found?
Yes. Copper under a slab is found by sound and heat. Galvanized shows up as pressure loss across the home. A sewer material like Orangeburg needs a camera run, since no pressure test applies to drains.
Can a leak inspection name my pipe material?
It names what the tests point to. Visible lines near the heater and meter behavior narrow it fast. Buried lines are identified by failure pattern and test results, not by digging them up.
Should I replace old pipes before they leak?
That is a plumber's call, not a detection call. A leak inspection report shows which lines are losing water now. Lines that hold pressure and show no loss stay on watch, not on a replacement list.
Do new homes have these problems?
Newer homes run PEX or PVC, which handle hard water better, but fittings can still fail. A meter test still settles whether water is leaving the system, whatever the pipe.
What does hard water do to pipes?
Hard water at about 11 grains per gallon leaves scale inside lines and heaters. Scale narrows galvanized lines fastest and stresses joints over time. It does not cause a leak on its own, but it speeds the wear that does.
Related
Think you have a leak?
Call AquaTrace Leak Detection to describe what you are seeing in Citrus Heights and get a plan to find it.
Call (123) 456-7890Last updated: October 26, 2026.