# Galvanized Pipe Replacement NYC | Steel to Copper | NYC Repipe & Repair > Galvanized pipe replacement in NYC: rusted steel supply swapped for Type L copper, with code-listed transitions and a DOB NOW filing. Free estimates. URL: https://nycrepipe.com/galvanized-pipe-replacement/ # Galvanized Pipe Replacement in NYC For prewar houses and apartments where galvanized steel supply pipe is causing brown water, falling pressure and leaks at the threads. Get a free estimate → [☎ Call (929) 659-6658](tel:+19296596658) By NYC Repipe & Repair · Last reviewed October 19 A cut section of galvanized pipe, its bore narrowed by rust, beside new Type L copper. Illustrative. [NYC Repipe & Repair](https://nycrepipe.com/) replaces galvanized steel water pipe with Type L copper in New York City houses and apartments. Galvanized pipe replacement is the fix for the two problems galvanized causes as it ages: brown or orange water, and pressure that drops floor by floor as rust closes the bore. Published lifespans for galvanized run about 40 to 60 years, and it was the standard supply pipe until roughly the 1950s and 1960s. The new pipe is copper because the 2022 NYC Plumbing Code no longer lists galvanized steel for water distribution. ## What happens on the first visit 1. Pressure and flow readings at the meter, the lowest fixture and the top-floor shower, to measure how far scale has closed the pipe. 2. Galvanized located at three or more points, plus any copper from earlier repairs. 3. The service line checked from the curb valve to the meter for galvanized or lead, and the electrical ground noted if it uses the water pipe. 4. A written, itemized price covering the copper, transitions, DOB filing and wall openings, before anything is booked. ## How galvanized pipe fails in NYC water Galvanized pipe is steel with a thin zinc coating. Once the zinc is gone, the steel rusts from the inside, and the rust builds up as scale that narrows the bore. Galvanized was the standard supply pipe in New York City until roughly the 1950s and 1960s, and city property records (MapPLUTO) show **74% of Brooklyn’s one- to four-family houses were built before 1940**, with a Queens median of 1935. Against a typical working life of 40 to 60 years, most of that pipe is decades past due. NYC water speeds the process. It is soft, averaging about 25 mg/L hardness, and [DEP’s annual water quality report](https://www.nyc.gov/assets/dep/downloads/pdf/water/drinking-water/drinking-water-supply-quality-report/2024-drinking-water-supply-quality-report.pdf) puts the average Langelier saturation index at **−2.21**, which means the water dissolves metal instead of coating it. DEP’s orthophosphate dosing slows corrosion but can’t remove rust already in the pipe. The symptoms are predictable: - **Brown or orange water** after the tap sits overnight, often worst on the hot side. [Brown tap water](https://nycrepipe.com/answers/brown-tap-water/) explains how to tell pipe rust from a water heater or a street main. - **Pressure that falls floor by floor**, because scale chokes a 3/4-inch line. [Low water pressure](https://nycrepipe.com/low-water-pressure/) covers the other causes to rule out. - **Leaks at threaded joints**, where the threads cut the wall of the pipe to its thinnest point. ## Copper only, and how the transition is made Galvanized steel is not on [Table 605.4 of the 2022 NYC Plumbing Code](https://www.nyc.gov/assets/buildings/codes-pdf/cons_codes_2022/2022PC_Chapter6_WaterSupplyWBwm.pdf), the list of materials allowed for water distribution. Neither are PEX, CPVC or thin-wall Type M copper. Replacement work is done in Type L copper (ASTM B88), soldered or joined with permanent press fittings. Removable push-fit fittings are prohibited (PC 605.9). Where new copper has to connect to galvanized that stays in service, the joint is the weak point. Copper and steel touching in water set up galvanic corrosion, which eats the steel side. PC 605.24.1 requires a brass fitting, a dielectric fitting or an ASSE 1079 dielectric union at every such transition. A plain steel union is not enough. In older houses the metal water pipe sometimes serves as the electrical ground, so when galvanized at the service comes out, an electrician checks the grounding path. ## Section by section, or the whole house A burst galvanized section can be cut out and replaced in copper, the right move in an emergency. The rest of the galvanized is the same age, though, and the next weak joint is often a few feet away. Partial [pipe replacement](https://nycrepipe.com/pipe-replacement/) still makes sense when the galvanized is limited to one area, for example a single bathroom branch left over from an earlier conversion. When galvanized shows up at three or more points, or the house has both brown water and weak upper-floor pressure, the economical answer is usually a [whole house repiping](https://nycrepipe.com/whole-house-repiping/). The decision guide [should I replace galvanized pipes?](https://nycrepipe.com/answers/should-i-replace-galvanized-pipes/) walks through the trade-off. If you’re buying, read [buying a house with galvanized pipes](https://nycrepipe.com/answers/galvanized-pipes-buying-a-house-nyc/) before the inspection contingency runs out. ## Cost, permits and the service line Published NYC ranges for a full copper repipe run **$12,000 to $30,000+** for a 2–3 story house ([A Good Plumber](https://agoodplumber.com/plumbing-articles/old-brooklyn-brownstones-and-plumbing-whats-lurking-behind-the-walls/)) and **$15,000 to $35,000** for a brownstone ([The Plumber NYC](https://theplumbernyc.com/borough/brooklyn)). Floors, bathrooms, plaster versus drywall and how much galvanized remains drive the number. [Galvanized pipe replacement cost](https://nycrepipe.com/answers/galvanized-pipe-replacement-cost/) breaks the numbers down, and the [repipe cost estimator](https://nycrepipe.com/tools/repipe-cost-estimator/) runs your own house. The work is filed in DOB NOW: Build as a Limited Alteration Application by a NYC Licensed Master Plumber. For a one- to three-family house the fee starts at $130 for work up to $5,000, plus $2.60 per additional $1,000, so a $30,000 job carries a $195 fee. The [permit guide](https://nycrepipe.com/answers/repiping-permit-nyc/) has the full chart. Check the line from the street, too. DEP counts about 121,000 service lines in the city that are lead or galvanized requiring replacement, and the owner owns the whole line. A galvanized service feeding new interior copper limits the gain. See [lead service line replacement](https://nycrepipe.com/lead-service-line-replacement/) for how DEP’s free program and private replacement work, and the [Queens](https://nycrepipe.com/boroughs/queens/) and [Brooklyn](https://nycrepipe.com/boroughs/brooklyn/) pages for local housing stock. ## What's included - Type L copper for all replaced hot and cold supply (ASTM B88) - ASSE 1079 dielectric unions or brass fittings at every steel transition - Lead-free valves and fittings certified to NSF 372 - New shutoff valves at each fixture served - DOB NOW filing by a NYC Licensed Master Plumber - Pressure test before walls are closed - Removal of abandoned galvanized that can be safely reached - A grounding check flagged for the electrician where the old pipe was the ground > Brown water in the morning and weak pressure upstairs? A pressure test on three floors shows how much galvanized is left. [(929) 659-6658](tel:+19296596658) Typical NYC price $12,000–$35,000 per 1–4 story house, full galvanized-to-copper repipe. Published range, not a quote. Sources: [A Good Plumber, Brooklyn cost table](https://agoodplumber.com/plumbing-articles/old-brooklyn-brownstones-and-plumbing-whats-lurking-behind-the-walls/); [The Plumber NYC, Brooklyn FAQ](https://theplumbernyc.com/borough/brooklyn) Calls answered 24/7 Leak right now? Shut the main valve by the meter, then call. [☎ (929) 659-6658](tel:+19296596658) Get a free estimate Spec
MaterialType L copper
CodeNYC PC T.605.4
Lead-freeNSF/ANSI 372
TransitionsASSE 1079
PermitDOB NOW · LAA
[Free tool Repipe cost estimator → Your house, your number, in under a minute.](https://nycrepipe.com/tools/repipe-cost-estimator/) The permit trail ## What a legal NYC repipe *leaves on the record* Every permitted repipe produces the same paper trail at the Department of Buildings. It's what a buyer's attorney, a co-op board or a lender will look for later. 1. DOB NOW: Build Filed Limited Alteration Application Filed by the Licensed Master Plumber, with the scope and the job cost. 2. DOB Issued Work permit Issued in real time for most repipes, and posted at the job. 3. On site Installed Type L copper in Run alongside the old pipe and switched over section by section. 4. Plumbing Code §108 Tested Pressure test The whole new system holds under test before walls close. 5. DOB Signed off Inspection and sign-off The job closes cleanly on the building's DOB record. Three ways it gets done ## Patch, cheap repipe, or permitted copper Three ways NYC pipe work gets done. Only one survives a co-op board, a refinance and the next winter. | What matters | DIY patch | Cheap operator | Permitted copper job | | --- | --- | --- | --- | | Pipe material | Whatever the hardware store sells, often PEX | PEX or thin Type M copper to save money | Type L copper, listed in NYC Plumbing Code Table 605.4 | | Fittings | Push-fit connectors (prohibited, PC 605.9) | Mixed: some push-fit, some solder | Soldered or permanent press joints; dielectric unions at steel | | Who may legally do it | Not the owner: NYC requires a Licensed Master Plumber | Often unlicensed, or a licence borrowed for the filing | A NYC Licensed Master Plumber, or a crew under one | | Permit | None | Often skipped (penalties start at $520, or $6,000 in 3+ family buildings) | Filed in DOB NOW and signed off | | Pressure test | None | Rarely | Whole system tested before walls close | | Co-op or condo board | Will not approve | Usually rejected at the insurance-certificate stage | Meets typical alteration-agreement requirements | | At sale or refinance | Unpermitted work can surface in inspection | Open DOB issues can delay closing | A clean DOB record for the job | Sources: [2022 NYC Plumbing Code, Chapter 6](https://www.nyc.gov/assets/buildings/codes-pdf/cons_codes_2022/2022PC_Chapter6_WaterSupplyWBwm.pdf); NYC DOB LAA fee and penalty charts ([1–3 family](https://www.nyc.gov/assets/buildings/pdf/laa_category_2_fee_chart_1-2-3_family.pdf), [other buildings](https://www.nyc.gov/assets/buildings/pdf/laa_fee_chart_other.pdf)). From the field ## What galvanized pipe replacement looks like in an NYC house Illustrative photographs of typical conditions and the copper that replaces them. Answered ## Galvanized Pipe Replacement, answered Can I replace a burst galvanized section with more galvanized pipe? No. Galvanized steel is not on Table 605.4 of the 2022 NYC Plumbing Code, so it can't be used for new or replacement water piping. The burst section is replaced in Type L copper, joined to the remaining galvanized with a brass fitting, dielectric fitting or ASSE 1079 dielectric union, as PC 605.24.1 requires. Are galvanized pipes illegal in NYC? Existing galvanized pipe isn't flagged by the code just for being galvanized. What the 2022 NYC Plumbing Code does is leave it off the list of materials allowed for water distribution, so nothing new can be installed in galvanized. The reason to replace it is condition: rust, scale, brown water and leaks at the threads after 40 to 60 years of service. Do galvanized pipes cause brown water? Often, yes. Once the zinc coating wears through, the steel rusts from the inside, and NYC's soft, corrosive water (average Langelier index −2.21 in DEP's annual water quality report) speeds that up. Rust released after the water sits overnight shows as brown or orange water, often worst on the hot side. A street main or water heater can cause it too, so the first visit checks all three. How much does galvanized pipe replacement cost in NYC? For a full replacement in copper, NYC contractors publish $12,000 to $30,000+ for a 2–3 story house and $15,000 to $35,000 for a brownstone. The main drivers are floors, bathrooms, plaster versus drywall, and how much galvanized remains. The DOB filing for a one- to three-family house starts at $130. Who actually does the plumbing work? In New York City, permitted plumbing work must be performed by a NYC Licensed Master Plumber or by workers under an LMP's direct supervision, and the LMP files the permit in DOB NOW. Ask any contractor for the LMP's licence number before work starts, and check it on the DOB's public licence search. Further reading ## Related answers - [What Is the Cost to Replace Galvanized Pipes in NYC?](https://nycrepipe.com/answers/galvanized-pipe-replacement-cost/) - [Should I Replace Galvanized Pipes?](https://nycrepipe.com/answers/should-i-replace-galvanized-pipes/) - [Brown Tap Water: Why Is My Water Brown in NYC?](https://nycrepipe.com/answers/brown-tap-water/) - [Buying a House With Galvanized Pipes in NYC: What Should You Check?](https://nycrepipe.com/answers/galvanized-pipes-buying-a-house-nyc/) Related work - [Whole House RepipingEvery supply line from the meter to each fixture, replaced in Type L copper for 1–3 family houses, brownstones and rowhouses.](https://nycrepipe.com/whole-house-repiping/) - [Low Water PressureWeak showers on the top floor, a trickle at the kitchen tap. Diagnosed at the meter, the service line and the house piping.](https://nycrepipe.com/low-water-pressure/) - [Pipe RepairLeaking joints, corroded galvanized nipples and cracked fittings, repaired with code-listed copper and brass.](https://nycrepipe.com/pipe-repair/) Get your galvanized pipe replacement priced in writing Pressure measured, pipe identified, an itemized price including the DOB permit.