What you will find in older Villa Park homes
Many Villa Park homes were built in the 1960s and 1970s, when indoor gas piping was almost always threaded black steel. That pipe often still serves the water heater, furnace and range today. Additions made over the decades, such as pool heaters, barbecues and fire features, may use different materials depending on when and how they were installed.
When a plumber proposes a repair or a new line, the material choice affects labor, how much wall or yard has to be opened, and what protection the pipe needs. Knowing the basics helps you compare estimates that suggest different approaches.
The three common materials
| Material | Typical use | Key requirements |
|---|---|---|
| Black steel (threaded) | Indoor runs, exposed piping, meter connections | Joints sealed with approved thread compound; protected or coated if exposed to soil or corrosion |
| CSST (corrugated stainless steel tubing) | Long indoor runs through walls, floors and attics | Installed by trained installers to the manufacturer's instructions, including bonding and strike protection |
| Polyethylene (PE) | Buried runs only, such as meter to pool equipment or BBQ | Approved for underground use only, with a tracer wire and transition fittings where it comes above ground |
Black steel versus CSST for indoor runs
Black steel
- Rigid and durable once installed
- Every turn needs a fitting and a threaded joint
- More labor to route through finished walls
- Familiar to every inspector
CSST
- Flexible, with fewer joints over long runs
- Easier to fish through attics and walls
- Must be bonded and protected per instructions
- Installer certification is often required by the manufacturer
What drives material and labor cost
- Total length of the run and number of turns
- Whether the route is open framing, finished walls, attic, crawl space or underground
- Pipe diameter needed for the combined appliance load
- Trenching distance and surfaces in the way, such as concrete or pavers
- Bonding, protection plates, sleeves and transition fittings
- Permit, inspection and pressure testing requirements
Mixing materials is normal
A single gas system often uses more than one material: steel at the meter, polyethylene underground to the backyard, a transition riser where it comes up, and steel or CSST to the appliance. Each transition is a joint that has to be done correctly and tested. A good estimate explains where each material starts and stops.
Questions to ask about materials
- Which material will you use for each part of the run, and why?
- If CSST is used, how will it be bonded and protected?
- If any pipe is buried, what material, depth and tracer wire will you use?
- Will the pipe be sized for future appliances as well as current ones?
Common questions
Is copper used for gas lines?
Copper is allowed for gas in some places under certain conditions, but it is uncommon in Southern California homes. Ask your plumber and check with the city if it is proposed.
Should old black steel pipe be replaced?
Not automatically. Indoor black steel can last a very long time. Replacement makes sense for corroded, damaged or undersized sections.
Can a homeowner install CSST?
Manufacturers generally require trained or certified installers, and gas work typically needs a permit. Hire a licensed plumber.
General information for Villa Park, not a quote or professional advice. In an emergency, call 911.