# Pipe Replacement NYC | Partial Copper Repipes | NYC Repipe & Repair > Pipe replacement in NYC for one run, one floor or one bathroom, in Type L copper with the right DOB filing and a written price first. Free estimates. URL: https://nycrepipe.com/pipe-replacement/ # Pipe Replacement in NYC, One Section at a Time For houses and apartments where one run, one floor or one bathroom has failed but the rest of the supply system still tests sound. Get a free estimate → [☎ Call (929) 659-6658](tel:+19296596658) By NYC Repipe & Repair · Last reviewed October 19 A short run of new copper tied into an existing riser with a new shutoff valve. Illustrative. [NYC Repipe & Repair](https://nycrepipe.com/) replaces failing sections of water supply pipe in New York City homes: one corroded run, the piping on a single floor, or the lines that feed one bathroom or kitchen, in Type L copper. Pipe replacement on this scale is the right call when the damage is local and the rest of the system tests sound. It costs far less than a full repipe and opens far fewer walls. When pressure readings and material checks show the problem runs through the whole house, the written estimate says so plainly. ## What happens on the first visit 1. Pressure readings at the meter and on the affected run, compared with the floors above and below. 2. Pipe material identified on both sides of the failing section, so new copper only joins pipe worth keeping. 3. The start and end points located: a riser tee, a branch takeoff or a shutoff valve, which sets how far the replacement reaches. 4. A written, itemized price that says whether the job is ordinary plumbing work or needs a DOB NOW filing, before anything is booked. ## When a partial replacement makes sense A single run can fail for reasons unrelated to the rest of the house: a section frozen in an exterior wall, a branch patched with mismatched fittings, or one stretch of galvanized left behind when the rest went to copper. Then pipe replacement on one run, one floor or one bathroom fixes the cause without opening every wall. The test is whether the problem is local. Partial replacement is the right call when: - **Pressure is normal everywhere except the affected fixtures.** If the top-floor shower and the basement sink read the same as the meter, the risers are doing their job. - **The pipe on both sides of the failure is sound.** Copper that is clean inside, or galvanized that was already replaced elsewhere, is worth connecting to. - **The leak history points to one place.** Three leaks on the same bathroom branch is a branch problem. Three leaks on three floors is a system problem. - **The walls are already open.** A kitchen or bathroom renovation is the cheapest moment to replace the lines behind it. See [repiping during renovation](https://nycrepipe.com/repiping-during-renovation/). If the leak itself is the question, start with [water leak detection](https://nycrepipe.com/water-leak-detection/) or [pipe repair](https://nycrepipe.com/pipe-repair/). ## Where the new copper starts and stops A partial job lives or dies at its ends. The new section should begin at a new full-port shutoff valve at a riser tee or branch takeoff, and end at the fixture stops. Stopping halfway along a corroded line just moves the next leak a few feet down the wall. The 2022 NYC Plumbing Code sets the rules for both the pipe and the joints. [Table 605.4](https://www.nyc.gov/assets/buildings/codes-pdf/cons_codes_2022/2022PC_Chapter6_WaterSupplyWBwm.pdf) lists copper tubing Types K and L for water distribution, not PEX, CPVC, galvanized steel or Type M copper. Removable push-fit fittings are prohibited (PC 605.9), so the joints are soldered or made with permanent press fittings. Where new copper meets old galvanized, PC 605.24.1 requires a brass fitting, a dielectric fitting or an ASSE 1079 dielectric union to stop galvanic corrosion at the joint. [Copper vs PEX in NYC](https://nycrepipe.com/answers/copper-vs-pex-nyc/) explains why the cheaper national options don’t apply here. ## Permits and what drives the price DOB treats repair or replacement of non-gas piping **no longer than 10 feet** as ordinary plumbing work: no permit, with the Licensed Master Plumber reporting it on [form OP128](https://www.nyc.gov/assets/buildings/pdf/op128-inst.pdf). Anything longer, such as a floor’s worth of branches or a bathroom’s supply, is filed in DOB NOW: Build as a Limited Alteration Application. The filing fee is small. On a one- to three-family house, [DOB’s LAA fee chart](https://www.nyc.gov/assets/buildings/pdf/laa_category_2_fee_chart_1-2-3_family.pdf) starts at $130 for work up to $5,000, plus $2.60 per additional $1,000. In co-ops, condos and buildings with four or more units it starts at $195. Unpermitted work costs more: penalties start at $520 for a one- or two-family house and $6,000 for other buildings. See the [permit guide](https://nycrepipe.com/answers/repiping-permit-nyc/). The price itself depends on four things: - **Length and number of fixtures** on the run. - **Access:** an open basement ceiling is quick; a run buried in a tiled wall is not. - **Wall finish:** plaster and lath takes longer to open and restore than drywall. - **Tie-in points:** how many transitions to old pipe the job needs. For full-system numbers to compare against, see [how much repiping costs in NYC](https://nycrepipe.com/answers/repiping-cost-nyc/). ## When pipe replacement becomes a repipe Partial work stops making sense once the pipe beyond the repair is in the same condition as the pipe being replaced. Brown water on every tap, falling pressure on the upper floors and galvanized showing at three or more points all mean the system has reached the end of its life. Galvanized carries a typical working life of 40 to 60 years, and 74% of Brooklyn’s one- to four-family houses were built before 1940. In that case two or three partial jobs usually cost more, in total, than one [whole house repiping](https://nycrepipe.com/whole-house-repiping/) would have. The first visit settles it with pressure readings and a material check at several points. For a quick read before calling, try the [repipe assessment](https://nycrepipe.com/tools/repipe-assessment/). Galvanized houses should also read [should I replace galvanized pipes?](https://nycrepipe.com/answers/should-i-replace-galvanized-pipes/) and the [galvanized pipe replacement](https://nycrepipe.com/galvanized-pipe-replacement/) page. ## What's included - Type L copper supply pipe (ASTM B88) for the replaced section - A new full-port shutoff valve at the start of the run - Lead-free fittings and valves certified to NSF 372 - Brass or ASSE 1079 dielectric transitions to old galvanized - Soldered or permanent press joints, never push-fit - OP128 reporting or a DOB NOW filing by a NYC Licensed Master Plumber - Pressure test of the new section before walls close - Water normally restored at the end of each working day > One bad run or a whole system on its way out? Pressure readings on three floors usually answer it in one visit. [(929) 659-6658](tel:+19296596658) 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 pipe replacement looks like in an NYC house Illustrative photographs of typical conditions and the copper that replaces them. Answered ## Pipe Replacement, answered When is partial pipe replacement enough? When the failure is local. If top-floor pressure matches the meter, the pipe on both sides is sound, and the leaks point to one branch, replacing that run fixes the cause. If galvanized shows up at three or more points, or several floors lose pressure, a whole house repipe usually costs less than repeated partial jobs. Does replacing a short section of pipe need a permit in NYC? Not if it is 10 feet or less. DOB treats repair or replacement of non-gas piping no longer than 10 feet as ordinary plumbing work: no permit, reported by the Licensed Master Plumber on form OP128. Longer runs are filed in DOB NOW as a Limited Alteration Application. For a one- to three-family house, that fee starts at $130 for work up to $5,000. Can new copper be connected to my old galvanized pipe? Yes, with the right fitting. Copper touching steel in water causes galvanic corrosion that eats the steel side of the joint. PC 605.24.1 of the 2022 NYC Plumbing Code requires a brass fitting, a dielectric fitting or an ASSE 1079 dielectric union at every copper-to-galvanized transition. Can the replacement section be done in PEX to save money? No. Table 605.4 of the 2022 NYC Plumbing Code lists copper tubing Types K and L, brass, ductile iron and stainless steel for water distribution. PEX, CPVC and Type M copper are not on it, and removable push-fit fittings are prohibited under PC 605.9. NYC replacements are Type L copper. 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 - [How Much Does Repiping Cost in NYC?](https://nycrepipe.com/answers/repiping-cost-nyc/) - [Does Repiping Require a Permit in NYC?](https://nycrepipe.com/answers/repiping-permit-nyc/) - [Should I Replace Galvanized Pipes?](https://nycrepipe.com/answers/should-i-replace-galvanized-pipes/) - [Pinhole Leaks in Copper Pipes: Repair or Repipe?](https://nycrepipe.com/answers/pinhole-leaks-copper-pipes/) - [Copper vs PEX: Is PEX Legal in NYC?](https://nycrepipe.com/answers/copper-vs-pex-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/) - [Pipe RepairLeaking joints, corroded galvanized nipples and cracked fittings, repaired with code-listed copper and brass.](https://nycrepipe.com/pipe-repair/) - [Repiping During RenovationOpen walls are the cheapest time to repipe. Coordinated with your GC and architect, and filed correctly.](https://nycrepipe.com/repiping-during-renovation/) Get your pipe replacement priced in writing Pressure measured, pipe identified, an itemized price including the DOB permit.