Pipe Material Comparison Guide for Denver Homes
Denver housing spans a century, and you can date a house by what is in its walls. Galvanized before 1960. Copper from the 1950s on. Polybutylene from 1978 to 1995. PEX since the 1990s. Cast iron for drains into the 1970s, then ABS and PVC. Here is what each one does and how it fails.
- Supply and drain materials by era, with failure modes
- Straight comparison of PEX, copper, CPVC, and galvanized
- How to identify what you have in ten minutes
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What it is
Pipe material comparison A pipe material comparison is an evaluation of supply and drain pipe options, such as PEX, copper, CPVC, galvanized steel, and cast iron, weighing cost, installation disruption, and durability for a specific house.
A Denver homeowner should care because choosing the right material for their home's age and layout affects both the upfront repipe cost and how long the new plumbing lasts.
Identify the material before you price the fix
The right repair depends entirely on what is in the wall. Galvanized needs replacement, not repair. Polybutylene needs replacement regardless of condition. Copper with pinholes may just need the pressure corrected. Cast iron needs a camera before anyone condemns it.
- Galvanized steel: pre-1960 supply, corrodes shut from the inside
- Copper: 1950s onward, durable, vulnerable to high pressure and thin wall
- Polybutylene: 1978 to 1995, gray, fails without warning
- PEX: 1990s onward, flexible, freeze tolerant, current standard
- Cast iron: drains into the 1970s, scales and rots along horizontal runs
- ABS and PVC: modern drain standard, durable and inexpensive
How to identify what you have
- Magnet sticks and pipe is dull gray: galvanized steel
- Reddish brown metal with soldered joints: copper
- Gray flexible plastic stamped PB2110: polybutylene
- Colored flexible tubing with crimp or expansion rings: PEX
- Heavy black drain pipe with hub joints: cast iron
- Black or white plastic drain pipe: ABS or PVC
Choosing a replacement material
- PEX: lowest install cost, fewest wall openings, best freeze tolerance
- Copper: highest material cost, rigid, best where pipe is exposed
- CPVC: inexpensive, but brittle with age and less common in Denver repipes
- PVC for drains: standard, durable, transmits more noise than cast iron
- Cast iron for drains: quiet, expensive, chosen when a stack runs by a bedroom
- Mixed systems: sound copper kept, PEX run to fixtures, with proper transitions
What to expect and how the work gets done
- 1
Identify
Magnet, color, joint style, and house age narrow it in minutes.
- 2
Assess condition
Pressure and flow test on supply, camera inspection on drains.
- 3
Match the fix to the material
Repair what can be repaired, replace what cannot be trusted.
- 4
Plan the work
Whole house, phased, or targeted, with each option priced.
Compare your options
PEX versus copper versus CPVC for a repipe
PEX, copper, and CPVC are the three materials used for repiping a Denver home's water supply. They differ in labor, freeze behavior, and how disruptive the install is.
| Factor | PEX | Copper | CPVC |
|---|---|---|---|
| Cost drivers | Lowest labor of the three. Flexible runs mean fewer fittings and fewer openings in the drywall. | Material cost plus the most skilled labor. Every joint is soldered or pressed. | Material sits between the other two. Solvent welded joints are quick but every direction change is a fitting. |
| Lifespan | Long service life indoors. Direct sunlight degrades it, so it is not run exposed outdoors. | The longest track record of the three in Denver homes when the water chemistry is not aggressive. | Long service life indoors. Becomes brittle with age and impact, especially in unconditioned space. |
| Freeze behavior | Expands with the ice and often survives a freeze that would split rigid pipe. It is still not freeze proof. | Splits when water inside it freezes. The break usually shows up at the thaw. | Cracks when frozen and tends to fail at the fittings. |
| Water quality | No metal leaching. Some homeowners notice a taste on the first draws of a new system, which fades. | Long accepted for potable water. Aggressive water can cause pinhole corrosion over time. | No metal leaching. Approved for potable water. |
| Install disruption | Least disruptive. Long flexible runs can be pulled through existing cavities with limited drywall cuts. | Most disruptive. Rigid runs and open flame or press tooling need more access. | Moderate. Rigid runs need similar access to copper, without the flame. |
Credentials, reviews, and company proof
- Colorado Master PlumberRepipe work is permitted and inspected, with the whole system signed off, not patched section by section.
- Plumbing Contractor license 2110Licensed to pull permits on supply, drain, and service line replacement.
- Serving Denver since 2006Two decades opening walls in prewar bungalows, postwar ranches, and 1980s builds across the metro.
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How material choice affects cost
Material is a smaller share of a repipe than most people expect. Labor and wall repair are the bigger halves.
Need help right now? 24/7 emergency plumbing service. Planning a larger repair? See financing options.
- PEX material and labor are both lower than copper
- Copper adds commodity cost plus a joint-by-joint access requirement
- Cast iron drain replacement costs more than PVC but runs quieter
- Mixed systems can cut cost by keeping sound existing runs
- Wall finish type affects repair cost regardless of material
- Permit and inspection are the same either way
Frequently asked questions
Licenses, credentials, and company proof
- Colorado Master PlumberLicense MP-18927
- Colorado State Plumbing ContractorLicense 2110
- Family Owned & OperatedServing Denver since 2006, 20 years
- Better Business BureauAccredited Business, A+ rating
- Angie's List Super Service Award2012 through 2017
- Serving Denver since 2006Residential and commercial properties across the metro
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- Financing OptionsPayment options for large Denver plumbing repairs. Free written estimates and phased repipe plans so a needed repair does not wait. Call (720) 296-7972.View page
- Current Offers and CouponsCurrent Afford-A-Rooter offers for Denver plumbing, drain, sewer, and water heater work. Free estimates and straight pricing. Call (720) 296-7972.View page
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Not sure what is in your walls?
We will identify it and tell you whether it needs replacing.