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Pipe Work

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📋 About Pipe Work Services: Repair, Replace & Install ▾

Pipe work sits at the structural core of every home's plumbing system, and it falls under the broader [Plumbing](https://contractorsplanet.com/?service=plumbing) category as one of its most consequential subcategories. While a dripping faucet or a running toilet can often wait a day or two, failing, corroded, or improperly installed piping affects water pressure, water quality, structural integrity, and — in the case of gas lines — household safety. Understanding what pipe work actually covers helps homeowners make faster, better decisions when something goes wrong.

Q: How do I know if I need a simple pipe repair or a full repipe?
A single isolated leak — especially on a younger home — typically warrants a spot repair. Repiping becomes the more cost-effective choice when a plumber finds multiple active leaks in close proximity, when your pipes are galvanized steel (common pre-1970) or polybutylene (1978–1995), or when water discoloration and low pressure indicate widespread interior corrosion. A good diagnostic step is to request a whole-house camera or pressure-decay test; if the plumber finds more than two or three compromised sections in a single visit, the economics almost always favor repiping over repeated spot repairs over the next few years.
Q: What pipe material is best for a whole-home repipe — PEX or copper?
PEX-A (made by crosslinking polyethylene using the Engel method, as Uponor does) is the most popular choice today because it's flexible, freeze-resistant, faster to install, and roughly 30–50 % cheaper in materials than copper. Copper remains preferred in areas with aggressive water chemistry (low pH or high chloramine levels) that can degrade PEX fittings over time, and in some markets it commands a modest resale premium. CPVC is a lower-cost rigid alternative approved by most codes but more brittle in cold climates. Discuss your local water report with your plumber before deciding.
Read full guide ↓
Leak detection (walls, slab, ceiling)
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Repiping (partial or full home)
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Gas line installation/repair
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Outdoor hose bib/faucet install or repair
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Pipe Work Hiring Guide

📖 Overview

At its widest scope, pipe work includes any task that involves the physical supply, drain, waste, or vent pipes inside or attached to a structure. That means copper, CPVC, PEX, galvanized steel, cast iron, and HDPE pipe — as well as corrugated stainless steel tubing (CSST) for gas — all fall within this discipline. Plumbers licensed under state contractor boards (each state sets its own exam and bond requirements; in California that's the CSLB, in Florida the DBPR, in Texas the TSBPE) are typically required for any work involving supply lines, gas lines, or connections to municipal sewer mains. Drain, waste, and vent (DWV) rough-in sometimes falls within a general contractor's scope on a remodel, but the final connection work almost universally requires a licensed plumber.

[Leak detection (walls, slab, ceiling)](https://contractorsplanet.com/?service=plumbing&subcat=pipe-work&subsubcat=leak-detection-walls-slab-ceiling) is often the first pipe-work call a homeowner makes — water bills spike, a ceiling stain appears, or a floor feels warm in one spot. Modern leak detection has moved well beyond opening walls at random; today's specialists use electronic amplification equipment, thermal imaging cameras, and tracer gas (typically nitrogen mixed with 5 % hydrogen) to pinpoint a leak within inches before any demolition begins. Slab leaks are particularly common in regions with expansive clay soils — the Dallas–Fort Worth Metroplex and the Phoenix basin rank among the highest-frequency markets in the country — because soil movement stresses embedded copper over decades.

[Repiping (partial or full home)](https://contractorsplanet.com/?service=plumbing&subcat=pipe-work&subsubcat=repiping-partial-or-full-home) becomes the recommendation when leak detection reveals systemic corrosion, when pinhole leaks are recurring across multiple locations, or when a home still carries original galvanized steel pipe (common in houses built before 1970) or polybutylene pipe (installed widely from the late 1970s through 1995 before widespread failure led to a class-action settlement). Full repiping of a 2,000-square-foot, two-bath home typically runs $4,000–$15,000 depending on material choice — PEX-A (Uponor, Rehau) is the dominant modern choice for flexibility and freeze resistance, while copper remains preferred in markets with aggressive water chemistry that degrades PEX fittings.

[Gas line installation and repair](https://contractorsplanet.com/?service=plumbing&subcat=pipe-work&subsubcat=gas-line-installationrepair) requires a separate layer of licensing and inspection in most jurisdictions. The National Fuel Gas Code (NFPA 54) and the International Fuel Gas Code (IFGC) govern design and installation; local utilities like SoCalGas, Piedmont Natural Gas, or Nicor Gas may impose additional pressure-test requirements before restoring service. CSST flexible tubing has become standard for interior runs, but it must be bonded per NFPA 54 Section 7.13 to mitigate the risk of lightning-induced arc damage — a detail some installers skip and inspectors catch.

[Outdoor hose bib and faucet installation or repair](https://contractorsplanet.com/?service=plumbing&subcat=pipe-work&subsubcat=outdoor-hose-bibfaucet-install-or-repair) closes out the category with a task that feels minor but carries real consequences if done wrong. A standard non-frost-proof hose bib left in a climate that dips below 28 °F reliably will burst, sending water into a wall cavity undetected for hours. Frost-proof models (Woodford, Arrowhead Brass, and BrassCraft are the three dominant brands) extend the valve seat 8–12 inches into conditioned space. Installing or replacing one involves soldering or pressing a copper branch off the cold-water supply — straightforward for a licensed plumber but a permit-required task in many municipalities.

Knowing when to call a pipe-work specialist versus a general [Handyman](https://contractorsplanet.com/?service=handyman) or [General Contractor](https://contractorsplanet.com/?service=general-contractor) comes down to whether the work touches supply or gas lines, requires a permit, or involves opening a slab. For cosmetic fixture swaps — replacing a showerhead or a toilet — a handyman often suffices. For anything involving the pipes themselves, licensed pipe-work plumbers carry the required insurance, pull the right permits, and know how to schedule the mandatory pressure and visual inspections. If you suspect an active gas leak, leave the structure immediately and call your gas utility's 24-hour emergency line before calling any contractor; restoration work begins only after the utility has confirmed the supply is safely isolated.

✅ What it covers

  • Initial diagnostic assessment — visual inspection, pressure testing, or electronic leak detection to identify the problem pipe or system
  • Material selection — choosing between copper, PEX-A, PEX-B, CPVC, CSST, or cast iron based on application, local code, and water chemistry
  • Permit application and scheduling — filing with the local building department and booking mandatory inspections before work begins
  • Access work — cutting drywall, concrete saw-cutting a slab trench, or trenching outdoors to expose the pipe run
  • Pipe removal or isolation — properly capping, draining, and disposing of old galvanized, polybutylene, or damaged copper sections
  • New pipe installation — soldering, press-fitting, crimping, or threading connections to code-required specifications
  • Pressure and leak testing — hydrostatic or air-pressure tests on water lines; manometer tests on gas lines per NFPA 54
  • Inspection sign-off — municipal inspector verifies all work before walls are closed or slabs poured
  • Patch and restoration coordination — arranging drywall, concrete, or landscaping repair after pipe access is closed up
  • Final system flush and commissioning — flushing lines of debris, checking flow rates, and confirming no residual leaks before job close-out

💵 Typical cost range

$250 to $15,000

Pipe-work costs span an enormous range because the category covers everything from a $250–$400 outdoor hose bib replacement to a $10,000–$15,000 full-home repipe in a large two-story house. Leak detection alone typically runs $175–$600 for electronic or thermal-imaging locating, before any repair. Spot slab-leak repairs add $500–$2,500 for the jackhammer access, pipe repair, and concrete patching. Gas line extension or rerouting for a new appliance runs $300–$800 for short runs and $1,500–$3,500+ for longer or complex routes requiring permits and utility coordination. Material choice is a major driver — copper costs roughly 30–50 % more in material than PEX-A on a repipe but may carry a higher resale premium. Labor rates vary significantly by region; expect $95–$175/hr in most metro markets. Always request itemized quotes that separate labor, materials, permit fees, and any subcontracted concrete or drywall patching.

🛡️ Hiring tips

  • Verify the plumber holds an active state plumbing or contractor license — look up license numbers directly on your state board's website (CSLB, DBPR, TSBPE, etc.) rather than relying on a card
  • Confirm the contractor carries general liability insurance (minimum $1 million per occurrence) and workers' comp; request certificates naming you as additionally insured
  • Ask whether the contractor will pull the permit or expect you to — legitimate pipe-work plumbers pull their own permits; if they ask you to pull it, that's a red flag
  • Get at least three written, itemized bids covering labor, material specs (brand and pipe type), permit fees, and patch/restoration scope
  • For gas line work, confirm the contractor is familiar with your local utility's specific pressure-test and restoration requirements, not just the generic NFPA 54 standard
  • Check online reviews specifically for follow-through on scheduling inspections and patching work — many complaints arise not from the pipe work itself but from abandoned drywall holes or missed inspection appointments
  • For repiping projects, ask for a written warranty on both labor (minimum one year) and materials (PEX-A manufacturers like Uponor offer 25-year limited warranties)
  • If the job involves a slab leak, request a written explanation of the repair method — direct-access repair, re-routing through walls, or epoxy pipe lining — so you understand the trade-offs before signing

More frequently asked questions

Do I need a permit for pipe work inside my own home?
In virtually every U.S. jurisdiction, yes — any work involving water supply lines, drain-waste-vent modifications, or gas lines requires a building permit and at least one inspection. Permits protect you: an inspector confirms the installation meets code before walls close, and unpermitted work can void homeowner's insurance claims, complicate a home sale, and leave you liable for injuries. The only common exception is direct fixture replacement (swapping a toilet or faucet for an identical model) in jurisdictions that classify it as maintenance. When in doubt, call your local building department — most will answer quickly.
How long does a full-home repipe typically take?
For a single-story, two-bathroom home of roughly 1,500–2,000 square feet, most experienced crews complete the rough-in phase in one to two days. A two-story, three-bathroom home typically runs two to four days of active pipe installation. Add one to two days on each end for permit processing and the municipal inspection appointment. Water is typically shut off only during the active installation hours each day, so homeowners can usually remain in the house. Drywall patching — often handled by a separate subcontractor — adds several more days after inspection sign-off.
What are the warning signs of a slab leak?
The most common indicators are an unexplained spike in your water bill (sometimes 50–200 % above normal), the sound of running water when all fixtures are off, warm or wet spots on a concrete or tile floor, cracks appearing in floor tiles or drywall near the floor, and reduced hot-water pressure. In severe cases you may see water seeping up through flooring or detect a musty odor from moisture trapped under the slab. If you notice two or more of these signs simultaneously, call a leak-detection specialist promptly — slab leaks left untreated can undermine the foundation and promote mold growth within days.
Is gas line work something a licensed plumber handles, or do I need a separate gas contractor?
In most states, a licensed master plumber is authorized to install and repair natural gas and propane lines inside a structure, provided they're familiar with NFPA 54 and local utility requirements. Some states (Texas, for example) issue a separate Liquefied Petroleum Gas license for propane work. Always verify the specific license your state requires — ask the contractor to show both their plumbing license and any gas-specific endorsements. Your local gas utility will also need to inspect and restore service after any gas line work, so confirm the contractor has experience coordinating that process before you hire.
Can I use a handyman for outdoor hose bib replacement, or do I need a plumber?
It depends on your municipality's permit requirements and the complexity of the job. A frost-proof hose bib replacement that involves soldering or pressing onto a copper supply line is typically a permit-required task in most jurisdictions, which means a licensed plumber is legally required. In areas where permits aren't required for minor exterior faucet swaps, a skilled handyman can handle it — but confirm they have soldering experience and understand the correct installation depth for frost-proof models (the valve seat must sit at least 6 inches inside the building envelope). Improper installation is one of the leading causes of preventable interior water damage each winter.
How do pipe-work contractors charge — by the hour or by the job?
Most established plumbing contractors use flat-rate or fixed-bid pricing for well-defined jobs like hose bib replacements, repipes, or gas line extensions. Hourly billing ($95–$175/hr in most metro markets as of 2024) is more common for diagnostic work, leak detection, or complex repairs where the full scope isn't known upfront. For larger projects like repiping, always push for a written fixed-price contract that itemizes materials, labor, permit fees, and any patch or restoration work — hourly billing on a multi-day repipe can make the final invoice unpredictable. Request a not-to-exceed clause if a contractor insists on time-and-materials billing.

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