Galvanized vs. PEX | Should You Repipe Your Arvada Home?

If your Arvada home was built before 1975 and the supply lines have never been replaced, you almost certainly have galvanized steel pipes. They are corroding right now, from the inside out. The question is not whether they will fail. It is whether the failure happens on a schedule you choose or at 2 a.m. on a January night. Arvada Plumbing Pros assesses galvanized systems and gives you a written scope before any work begins. Call (720) 787-0333.

Why Galvanized Steel Pipes Fail in Arvada Homes

Galvanized steel pipe is iron pipe coated with a thin layer of zinc. The zinc protects the steel from corrosion in clean water conditions. Denver Water’s supply is hard water, carrying elevated calcium, magnesium, and dissolved mineral content. Over decades, the zinc lining erodes and the iron below corrodes from the inside out, building up a layer of rust and mineral scale on the interior pipe wall.

That interior corrosion does two things. First, it narrows the pipe diameter continuously, reducing water pressure throughout the home year by year. Second, it creates structural weakness in the pipe wall where the iron has corroded thin. The pipe does not announce when it is about to fail. It just does, often at a joint or elbow where the metal has corroded through.

Arvada homes with galvanized supply lines see accelerated corrosion compared to homes in soft-water markets. The same Denver Water chemistry that shortens water heater lifespan also accelerates galvanized steel pipe degradation. A plumbing inspection that includes supply line pressure testing and visual assessment of exposed galvanized sections can tell you how far along your system is before the first failure occurs.

Galvanized Steel vs. PEX | Side-by-Side Comparison

Galvanized Steel Pipe

Lifespan in Arvada's hard-water environment: 40 to 70 years, often less. Corrodes from inside, reducing flow over time. Rust and metallic taste in tap water as corrosion advances. Rigid: requires fittings at every direction change. Does not flex under freeze stress, cracks instead. Standard in pre-1970 Arvada construction, now past end of service life in most homes.

PEX-A (Cross-Linked Polyethylene)

Rated lifespan 25 to 50 years. Does not corrode. Does not scale. Flexible: runs through walls and around corners without fittings, reducing joint count and leak points. Handles freeze stress by flexing rather than cracking. Rated for full freeze recovery. The most common material for whole-house repiping in Colorado.

PEX is not the only replacement option. Copper pipe is fully proven, retains appraisal value, and resists bacterial growth. It costs more in materials and labor than PEX and cannot flex under freeze stress the way PEX does. For most Arvada homes doing a full repipe, PEX-A is the practical choice. For customers who prefer copper throughout, we install copper. We do not mix materials without a clear reason.

Signs Your Galvanized Pipes Need Replacing Now

Galvanized pipe does not announce failure with a single dramatic symptom. It degrades gradually, and the symptoms accumulate over years before a pinhole leak or full failure forces the issue. These signs mean your Arvada home’s galvanized pipes are approaching end of service life:

Water pressure dropping steadily across the whole house, not just one fixture
Rust-colored or brown water from the hot tap, especially after the system has been idle overnight
Metallic taste in tap water that worsens over time
Multiple pinhole leaks appearing at different pipe locations within a short period
Water heater filling with rust-tinged water: the same corroded supply water is entering the tank
Visible orange or brown staining inside the toilet tank from the fill line
Home built before 1970 with no documented pipe replacement history

Any one of these symptoms warrants a supply line assessment. Multiple symptoms together indicate a galvanized system approaching widespread failure. At that point, repiping the whole house is more cost-effective than patching individual failures as they occur, because individual failures will keep occurring.

What a Whole-House Repipe Involves in Arvada

A whole-house repipe in Arvada replaces all the supply lines from the main shutoff valve to every fixture in the home. The existing galvanized lines are removed. New PEX-A or copper lines are routed through walls, crawl spaces, and ceilings to every sink, toilet, shower, tub, dishwasher, and appliance. Every fixture connection is replaced with new valves and supply fittings.

Most Arvada repipe jobs take two to four days depending on home size, the number of fixtures, and crawl space access. You are without water during working hours on the first two days. After the new lines are installed and pressure-tested, water is restored. The job is permitted through Jefferson County. A county inspector approves the new supply system before the job is closed.

Water heater replacement frequently accompanies a whole-house repipe. The old heater has been filling with the same corrosion-laden water for years and typically shows sediment buildup, reduced efficiency, and shortened remaining service life. Water heater replacement during the same project avoids a separate service call within a year or two of the repipe. We price both together.

For information on slab-specific repiping decisions, where under-slab pipe failures require rerouting above grade, see our guide to slab leak detection and repair. Colorado plumbing contractors must hold a current State Plumbing Board license: verify at the DORA license lookup before hiring. We serve homeowners considering repiping across the area: Westminster CO · Lakewood CO · Golden CO · Wheat Ridge CO · Broomfield CO

Galvanized vs. PEX Repiping Arvada | FAQs

How do I know if my Arvada home has galvanized pipes?

Look at exposed supply lines in the crawl space, basement utility area, or under the kitchen sink. Galvanized steel pipe is dull grey and magnetic. It will show orange or brown rust staining where fittings connect and may show white scale deposits on the exterior. Copper pipe is a reddish-brown color. PEX is flexible and colored (red for hot, blue for cold, white neutral). If the pipe is grey and magnetic and your home was built before 1975, it is almost certainly galvanized.

How long do galvanized pipes last in Colorado?

In Colorado’s hard-water environment, galvanized steel supply lines typically last 40 to 70 years from installation. Homes with Denver Water service see accelerated interior corrosion from the mineral content. An Arvada home built in 1960 with original galvanized pipes is operating pipes that are 65 years old and well past typical service life. Pressure testing and visual assessment tell you where the system stands. Call (720) 787-0333 for an assessment.

Is PEX better than copper for repiping an older home?

For most Arvada homes, yes. PEX-A is flexible, reducing the joint count in walls. It handles freeze stress by flexing rather than cracking, which matters in Colorado’s climate. It does not corrode or scale. Material cost is lower than copper. The only areas where copper holds an advantage are appraisal value recognition and bacterial resistance in stagnant water situations. We use PEX-A for most repipes and copper when customers prefer it.

How much does a whole-house repipe cost in Arvada?

PEX repiping in Arvada typically runs $4,000 to $7,000 for a small home under 1,200 sq ft, $6,000 to $12,000 for a mid-size home, and $10,000 to $18,000 for larger homes over 2,500 sq ft. Copper adds approximately 20 to 30 percent to material cost. Slab-on-grade homes where pipes run through concrete add $1,500 to $4,000. Written estimate based on on-site assessment. Call (720) 787-0333 to schedule.

Does repiping increase home value in Colorado?

Yes, measurably. A home with a disclosed galvanized or polybutylene supply system sells at a discount or triggers repair demands from buyers. A repiped home with a Jefferson County permit and inspection on record is a clean disclosure. Buyers and their inspectors view modern supply lines as a resolved item rather than a liability. The repipe cost is typically recovered at sale through higher accepted offers and fewer contingency demands.

Old Pipes in Your Arvada Home? Get a Written Assessment.

Arvada Plumbing Pros assesses galvanized supply systems, identifies how far corrosion has progressed, and gives you a written repipe scope and price. No pressure. Inspection fee credited toward any work we perform. Call (720) 787-0333.