Whole Home Repiping in Keller TX: When Galvanized Pipes Give Out and What It Costs

By Ricky McFadden Licensed Master Plumber | Polly Plumbing | License No. RMP-42199 Serving Keller, Southlake, Colleyville, Flower Mound, North Richland Hills, Grapevine, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County. Based in Keller, TX.

Whole Home Repiping in Keller TX: When Galvanized Pipes Give Out and What It Costs

The average galvanized steel water supply pipe has a service life of 40 to 50 years. Keller homes built before 1980 are between 45 and 65 years old. Most of them were plumbed with galvanized steel supply lines when they were built. And Tarrant County’s hard water at 15 to 25 GPG depletes the zinc coating that protects galvanized steel faster than softer water markets, which means those pipes have been corroding from the inside out for longer than a nationally averaged timeline would suggest.

None of that means the pipes have failed. A Keller home with original galvanized supply lines from 1975 may still have running water and no visible leaks today. But the interior of those pipes looks nothing like the day they were installed. Scale buildup has progressively reduced the inner diameter. The zinc coating is gone in places, and rust is present. Water pressure throughout the house has declined noticeably over the years. The hot water faucets run discolored when first opened in the morning. And the last two plumbing repair calls in the past three years were both pinhole leaks at pipe joints.

If that description fits your Keller home, the question is no longer whether to repipe. It is when, with what material, and at what cost.

Call (817) 286-3446 any time to schedule an assessment. Live agents answer 24/7. License RMP-42199.

Written by Ricky McFadden Licensed Master Plumber at Polly Plumbing in Keller, TX. License RMP-42199. Ricky performs whole-home repiping throughout Keller and all of Tarrant County.

What Galvanized Pipe Does in Keller’s Hard Water

Galvanized pipe is steel pipe coated with zinc. The zinc layer is the pipe’s corrosion protection — it sacrifices itself to protect the steel underneath, similar to how a water heater anode rod sacrifices itself to protect the tank.

In low-hardness water, galvanized pipe can achieve the full 40 to 50 year service life its rating suggests. In Tarrant County hard water — documented by the City of Keller’s annual water quality reports at 15 to 25 GPG — calcium and mineral deposits accelerate the interior degradation significantly. The hard water minerals build up on the interior pipe wall, and the electrochemical process that depletes the zinc coating runs faster in mineral-rich water than in softer supply.

The result is a characteristic failure sequence that Ricky has seen dozens of times on Keller repipe calls:

Year 20 to 30: Interior scale deposits begin reducing the effective diameter. Water pressure drops progressively throughout the house, more noticeable at the end fixtures — the furthest shower from the meter, the upstairs bathroom, the outdoor hose bib.

Year 30 to 40: The zinc coating is depleted in the oldest sections. Rust begins. Morning flushing produces brown or rust-tinged water from faucets that have been sitting overnight.

Year 40 to 50: Pinhole leaks develop at joints and in the thin-walled sections where interior corrosion has eaten through. These are the emergency repair calls that start arriving — $300 to $600 each, fixing one joint at a time while the rest of the pipe system continues to deteriorate.

Year 50 and beyond: Multiple active leaks per year. The repair-by-repair approach is costing more than repiping would have years earlier.

A Real Call: The Keller Home That Needed to Sell

Jennifer called in February. She had lived in her Keller home — a 1973 ranch near the Parks at Keller neighborhood — for 22 years. She was preparing to sell. The buyer’s home inspection had flagged the original galvanized water supply lines as a material concern, and the buyer was requesting either a price reduction or repiping before close.

The galvanized pipes had been functioning. No active leaks at the time of inspection. But the inspector had measured water pressure at 38 PSI at the kitchen faucet — notably below the comfortable 50 to 80 PSI range — and noted visible rust-colored residue in the aerators. Two plumbing repair receipts from the previous three years documented pinhole leaks at joints.

Jennifer asked whether patching the two known problem joints would satisfy the buyer’s concern. Ricky was direct: no. A buyer’s agent with any plumbing knowledge knows that a 50-year-old galvanized system in Tarrant County hard water with documented pinhole leaks has more failures pending. Patching two joints on a 50-year-old system does not address the condition — it just addresses two symptoms of the condition.

The complete repipe in PEX took two days. Drywall patching where access was cut took another half day. The cost was $7,800 for a 2,100 square foot three-bedroom two-bath home.

The home went back on the market three weeks later with a material upgrade to its plumbing system. It sold without any plumbing objection from the next buyer’s inspector. Jennifer’s perspective afterward: she wished she had done it five years earlier and enjoyed the better water pressure herself rather than doing it for a sale.

That comment is worth holding on to. Repiping a Keller home with original galvanized pipe is not purely a crisis response. It is also an improvement that restores what the home’s plumbing was designed to deliver.

For buyers considering purchasing a Keller home with older pipe, and sellers who want to assess their plumbing before listing, see our pre-purchase plumbing inspection guide for Keller TX.

PEX vs Copper: The Right Choice for Keller Homes

When Ricky repipes a Keller home, the standard recommendation is PEX — cross-linked polyethylene flexible pipe — not copper. Here is why.

PEX is flexible. It can be run from a central manifold in the utility room to individual fixtures through walls and ceiling cavities with minimal drywall cutting. Copper is rigid and requires a fitting at every direction change, which means more joints, more labor, and more wall cuts.

PEX does not corrode. In Tarrant County’s hard water, copper supply lines can develop pinhole leaks from a process called pitting corrosion, where the mineral-rich water etches through the copper wall at specific points. PEX is immune to this. A Keller home repiped with PEX in hard water does not face the pinhole corrosion problem that copper can develop over decades.

PEX handles North Texas freeze events better. PEX is flexible enough to expand slightly when water inside it freezes, which reduces burst risk compared to rigid copper or galvanized steel. After Winter Storm Uri in 2021, homes with PEX supply lines showed significantly better outcomes than homes with rigid copper in unconditioned garage and attic runs.

PEX costs less. Installed, a PEX whole-home repipe runs approximately 40 to 60 percent less than a copper repipe of the same home. The labor cost is lower because PEX installs faster with less wall access required.

Where copper has an advantage: Copper is the only option acceptable within certain HOA design standards for exposed visible plumbing, and it carries a higher resale value perception with some buyers. For Keller homeowners where this matters, Ricky can quote both options.

For most Keller homes, PEX is the correct choice: lower cost, corrosion-resistant, freeze-tolerant, and appropriate for Tarrant County water chemistry.

What Whole Home Repiping Costs in Keller TX

Repiping cost in Keller is primarily a function of home size (square footage and number of bathrooms), pipe accessibility (single-story slab vs two-story with finished ceilings), and whether the old galvanized pipe has corroded to the point where removing it requires additional labor.

These ranges include materials, labor, permits, and pressure testing. They do not include drywall patching — wall and ceiling repairs from access cuts are a separate scope typically handled by a drywall contractor. Ricky can recommend a qualified drywall contractor from his regular Keller network.

Galvanized replacement runs 10 to 20 percent higher than these ranges in some cases, depending on how severely corroded the old fittings are and how much additional labor is needed to remove the old system.

Written quote before any work begins. City of Keller permit included in the project scope.

What the Repipe Process Looks Like in a Keller Home

Understanding the process removes the anxiety about what repiping involves. Most Keller homeowners who have never had a repipe imagine it is more disruptive than it actually is.

Day 1: Ricky walks the home and marks all fixture locations — every faucet, shower, toilet supply, washing machine connection, water heater, and hose bib. He designs the PEX manifold layout from the utility room or garage. The old galvanized pipe is isolated and the new PEX lines are run from the manifold to each fixture location. Access cuts into drywall are made where necessary to route the new pipe. By end of day one, most homes have running water restored through the new PEX system and the new lines are fully functional.

Day 2: The old galvanized system is properly capped and removed where accessible. Remaining connections are completed. The full system is pressure tested. Ricky schedules the City of Keller permit inspection.

After inspection: The drywall contractor patches the access cuts. This is typically a half-day to one-day scope depending on the number and size of cuts.

Most Keller homes are without water for a few hours on day one and have full service restored by the end of the same day. The drywall patching and painting is cosmetic and happens after the plumbing inspection clears.

When to Repipe vs When to Keep Repairing

Not every Keller home with galvanized pipe needs a repipe today. The decision framework is straightforward.

Repipe now when any of these are true: The home was built before 1975 and has original galvanized pipe that has never been repiped. Two or more pinhole leaks have occurred in the past five years. Morning water from any faucet runs brown or rust-tinged before clearing. Water pressure at the end fixtures is measurably below 45 PSI. The home is being sold and a buyer’s inspection has flagged the galvanized system. A new water heater installation has confirmed heavily scaled galvanized connections at the water heater stub-outs.

Targeted repairs are still appropriate when: The home has a mixed system — some galvanized sections replaced with copper or PEX during prior repairs — and the remaining galvanized sections are in better condition. Only one or two known leak points exist and the overall system shows no other signs of progressive failure. The home was built after 1985 and may have copper supply lines rather than galvanized.

The Keller hard water multiplier: A Keller home with galvanized pipe in Tarrant County hard water is degrading faster than the national timeline suggests. If you are on the fence about whether the system is past its service life, the 15 to 25 GPG water hardness tips the calculation toward acting sooner.

If you are not sure whether low pressure in your Keller home is coming from galvanized scale or from a simpler cause like a failing PRV, see our low water pressure diagnostic guide for Keller TX before committing to a repipe consultation.

Related Services

A whole-home repipe of the supply lines is separate from:

Water service line replacement (the buried line from the meter at the street to the foundation). If the exterior service line is also galvanized or has aged, Ricky assesses it separately. Water yard service up to 60 feet runs $7,947 (pricebook item EX-008) as a separate scope. See our water line repair guide for Keller TX for the full scope, costs, and repair-versus-replace framework.

Sewer line repiping. The drain, waste, and vent system is separate from the supply lines and uses different materials (PVC for replacement). For information on sewer line repair and replacement see our sewer line repair guide for Keller TX.

Gas line service. The black iron gas distribution system is separate from water supply lines. For gas line information see our gas line repair guide for Keller TX.

What Polly Plumbing Does on Every Keller Repipe Call

When you call Polly Plumbing for a repiping assessment in Keller or any surrounding Tarrant County city, Ricky walks the home, identifies the existing pipe material in all accessible locations, measures water pressure at multiple points, and reviews any prior repair history you have. He provides a written scope and cost breakdown before any commitment is made.

Every repipe includes the City of Keller permit and final inspection, a full pressure test after installation, and documentation of the completed work for your records and for the home’s transaction history.

Same-day repipe consultations throughout Keller, Southlake, Colleyville, Flower Mound, North Richland Hills, Grapevine, Fort Worth, Arlington, Trophy Club, Roanoke, and all of Tarrant County.

Call (817) 286-3446 any time. Live agents answer 24/7. No emergency surcharge.

Frequently Asked Questions About Whole Home Repiping in Keller TX

How much does whole home repiping cost in Keller TX?

A PEX whole-home repipe for a typical 3-bedroom 2-bath Keller home runs $6,500 to $9,500 including materials, labor, permit, and pressure test. Smaller homes run $4,500 to $6,500. Larger homes with 4 or more bathrooms run $8,500 and above. Copper repiping adds 40 to 60 percent to these ranges. Galvanized pipe replacement may add 10 to 20 percent due to corroded fitting removal. Drywall patching is a separate scope. Written quote before any work begins. Call Polly Plumbing at (817) 286-3446.

Should I repipe with PEX or copper in Keller TX?

PEX is the correct choice for most Keller homes. In Tarrant County hard water, copper can develop pitting corrosion over time — a failure mode PEX is immune to. PEX also handles North Texas freeze events better due to its flexibility and costs 40 to 60 percent less than copper installed. Copper is appropriate when HOA requirements or buyer presentation preferences specify it. Ricky quotes both options if requested.

How long does a whole home repipe take in Keller TX?

Most Keller homes complete the PEX repipe in one to two days. Water is typically off for a few hours on day one and restored through the new system by end of day. The drywall patching of access cuts is a separate half-day to one-day scope handled after the city inspection clears. Larger homes or homes with more complex pipe routing may take three days for the plumbing work.

Does Keller TX require a permit for whole home repiping?

Yes. The City of Keller requires a permit for whole-home repiping. Polly Plumbing pulls the permit as part of every repipe project scope. A city inspection is scheduled after installation is complete. The inspection confirms the installation meets Keller’s building code before the access cuts are patched. All Polly Plumbing repipe work is fully permitted and inspected. Call (817) 286-3446.

How do I know if my Keller home needs repiping?

Key indicators include: the home was built before 1975 and has original galvanized supply lines; two or more pinhole leaks in the past five years; brown or rust-tinged water from faucets in the morning before it clears; water pressure below 45 PSI at end fixtures; a buyer’s inspection has flagged the plumbing system; or a plumber found heavily scaled galvanized connections during water heater or fixture work. In Keller’s hard water, these signs arrive earlier than national galvanized pipe timelines suggest. Call Polly Plumbing at (817) 286-3446 for a same-day assessment.

Does Tarrant County hard water make galvanized pipes fail sooner in Keller TX?

Yes. The zinc coating on galvanized pipe depletes faster in hard water because the electrochemical corrosion process is accelerated by dissolved minerals. Tarrant County water at 15 to 25 GPG is among the hardest in Texas. A galvanized pipe that might last 50 years in average hardness water may show significant interior corrosion in Keller at 40 to 45 years. Any Keller home built before 1985 with original galvanized supply lines is worth inspecting regardless of current symptom level.

Can I repipe just part of my Keller home instead of the whole house?

Yes. Partial repiping targets specific sections — typically the galvanized runs in the older parts of the home while leaving newer copper or PEX sections in place. This approach costs less upfront but requires careful planning at the transition points where old pipe meets new. If multiple sections of the galvanized system show signs of deterioration, a full repipe is typically more cost-effective than multiple staged partial repipes. Ricky assesses the full system and presents both options with pricing during the consultation.

Written by Ricky McFadden Licensed Master Plumber, Polly Plumbing. Texas License RMP-42199. Based in Keller, TX. Serving Keller and all of Tarrant County.

Published: May 2026. Last reviewed: May 2026.