# When Should You Repipe a Rental Property in Philadelphia? > Repiping a rental property in Philadelphia: when to do it between occupants, stack-by-stack staging, telling residents, and who answers a lead line notice. URL: https://philadelphiafreedomrepipe.com/guide/repiping-rental-property-philadelphia/ Decision Guide For owners of rented houses and small apartment buildings: how to decide when old pipe should go, why vacancy is the easiest window, how to repipe one stack at a time with people living there, and what the owner has to handle on a lead service line. Last Updated: October 26, 2026 **The easiest time to repipe a rental is between occupants, once the pipe shows it is failing.** An empty unit means walls can be opened, water shut off and plaster patched without working around anyone’s day. There is no build year at which the code says a rental must be repiped; condition decides, and a pressure complaint should be diagnosed before anyone sells a repipe as the answer. [Philadelphia Freedom Repipe](https://philadelphiafreedomrepipe.com/) replaces water supply piping in rented houses and small multi-unit buildings across Philadelphia and nearby Delaware, Montgomery and Bucks County suburbs. This guide is for owners: when to repipe, how to stage the work around the people living there, and what an owner has to handle when the service line is lead. The [multi-unit repiping](https://philadelphiafreedomrepipe.com/multi-unit-repiping/) page covers larger buildings in more detail. ## Repipe now, or wait for a vacancy? A complaint about weak water in an occupied unit puts the decision on a deadline. Before committing to a repipe, measure. Static pressure at a test point, and flow at the lowest and highest fixtures with two taps open, separate a building where old galvanized chokes the flow from one where the problem is a half-closed valve, an old globe-style main shutoff, a clogged aerator or the service line from the street. Galvanized steel narrows from the inside as scale builds, so its symptom is often flow that collapses when two fixtures run. None of those readings proves one cause alone, and the [low water pressure guide](https://philadelphiafreedomrepipe.com/guide/low-water-pressure-philadelphia/) walks through the checks. If the old pipe is the cause and the problem is confined, a [partial repipe](https://philadelphiafreedomrepipe.com/partial-repiping/) of one bathroom group or one riser can restore the unit now, with the rest planned for a vacancy. If the pipe is galvanized throughout and leaking at joints, waiting usually means paying for emergency repairs, water damage below, and openings that get patched twice. A common middle path is to make the next turnover the deadline and fix only what has to be fixed in the meantime. ## Why vacancy is the easiest window In an empty unit, every wall can be opened at once, the water can stay off for as long as the cutover needs, and nobody has to be warned about dust or noise. The job usually runs in fewer stages, with fewer temporary transitions between old and new pipe, and the openings can be closed to the finish the next occupant will see. Repiping before a new lease also means the first service call under the next lease is less likely to be a leak in a ceiling. In a house with two units, timing the repipe to one vacancy still leaves the other unit occupied. The shared main in the basement and any shared risers have to be cut over with the occupied unit’s water off, so plan those windows with the people living there. ## Stack-by-stack staging in a multi-unit building In apartment buildings and converted rowhouses, kitchens and bathrooms are usually stacked above one another, so each stack has its own risers. Repiping one stack at a time keeps the rest of the building in service. 1. **Map the stacks.** The walk-through traces each riser from the basement main and records which units and fixtures it serves, and where earlier spot repairs left mixed materials. 2. **Run the new stack alongside the old.** New risers and branches are installed while the old pipe still supplies the units. 3. **Cut over one stack.** Water to that stack is shut off, the old risers are capped and the new ones connected. Only the units on that stack lose water, during that window. 4. **Test, then close.** Each stack is pressure tested before its openings close, and the lines are flushed after cutover. Costs come down when the layout repeats. Identical units with walls in the same place on every floor mean openings can be marked once and repeated; hallway closets or a shared chase can carry risers without opening living space. Vacant units in the stack can take the openings for the whole riser. The [living through a repipe guide](https://philadelphiafreedomrepipe.com/guide/living-through-a-repipe/) covers what occupied units go through. ## Code and permit points for rental buildings The material rule depends on occupancy. Under the Philadelphia Plumbing Code as amended effective April 1, 2024, PEX and other nonmetallic piping is allowed in one- and two-family dwellings and apartments, while any water supply piping that serves or sits within another occupancy, such as a shop on the ground floor, must be metallic. Metallic piping is also required where an occupied floor is more than 75 feet above fire-access level. The [guide to whether PEX is allowed in Philadelphia](https://philadelphiafreedomrepipe.com/guide/is-pex-allowed-in-philadelphia/) explains the rule. The permit fee depends on building type. L&I lists alterations in a one- or two-family dwelling at $50 for the first 7 fixtures and $22.50 for each after; other occupancies, which includes larger apartment buildings, start at $189 for the first 7 fixtures. The EZ permit, with no plans, covers alterations in buildings with four or fewer dwellings up to four stories, so a larger building should expect a fuller application. A licensed master plumber oversees the work in the city. In the suburbs, the rules can differ for rentals specifically. Upper Darby, for example, lets property owners pull their own plumbing permit only for an owner-occupied primary residence, not rentals or investment property. ## Telling residents about the work People who live in the building need to know what is happening in their unit and when. Give written notice of each water-off window and each day someone needs to be inside, following the lease and the notice rules that apply. Say which walls will be opened, how long they will stay open and how dust will be contained. If a resident relies on water for medical equipment, plan around it. A posted schedule by stack, with a contact for questions, cuts down on surprises. ## The service line: what the owner handles In Philadelphia the property owner owns the entire water service line, including the curb stop. When PWD finds a leaking or defective line it issues a Notice of Defect, and its notice states that “you (or your landlord if you rent) are responsible” for the pipes connecting the home to the main. The owner arranges the repair by a licensed plumber. For a lead or galvanized line, the routes are: - **The Service Line Replacement Pilot.** PWD replaces lead and galvanized service lines free in its pilot ZIPs, but only the owner can give permission. A resident who receives outreach should pass it to the owner. The [guide to the pilot phases](https://philadelphiafreedomrepipe.com/blog/pwd-service-line-pilot-phases/) explains how the program rolls out. - **The HELP loan.** PWD’s 0% loan is open to owners of residential properties with four or fewer units, with an operable meter and a water bill not more than two cycles behind. A lead line qualifies without a Notice of Defect, and a lien is placed on the property. See the [PWD HELP loan guide](https://philadelphiafreedomrepipe.com/guide/pwd-help-loan/). - **Private replacement.** PWD estimates a private plumber’s replacement at $3,000 to $12,000, more with a street opening. PHDC’s Basic Systems Repair Program is for owner-occupied single-family homes, so a rental does not qualify. The city-promoted service line protection program described in PWD’s notice starts coverage 30 days after enrollment and excludes pre-existing issues. A water filter certified for lead reduction can lower lead at the tap it serves while a replacement is arranged, but it does not change what the line is made of. The [free lead line replacement guide](https://philadelphiafreedomrepipe.com/guide/free-lead-line-replacement-philadelphia/) compares every route, and the [Notice of Defect guide](https://philadelphiafreedomrepipe.com/guide/philadelphia-water-notice-of-defect/) covers deadlines. ## Getting a scope that fits a rental Ask for a scope that lists the units and fixtures on each stack, the order of stages, the water-off windows by unit, the openings by unit and who closes each, and the pipe material for each part of the building. Philadelphia Freedom Repipe’s process ends with labeled shutoffs for each stack, which makes the next repair in an occupied unit faster. The [repiping cost guide](https://philadelphiafreedomrepipe.com/guide/repiping-cost-philadelphia/) explains the drivers behind a price. ## Questions about this guide ### Is there a building age at which a Philadelphia rental has to be repiped? No year triggers a repipe. Plumbing codes govern how new and replacement work is done, not when sound existing pipe must come out. What forces the decision is condition: leaks, failing flow, discolored water, or a Notice of Defect on the service line. Age tells you what material to expect, not whether it has failed. ### Can an apartment building be repiped one stack at a time with residents in place? Yes, and it is the usual way. Units stacked above one another share risers, so one stack can be replaced and cut over while the others keep running on the old pipe. Only the units on that stack lose water, and only during the cutover. Each stage is pressure tested before its walls close. ### Who has to approve a lead service line replacement at a rented house? The property owner. In Philadelphia the owner owns the whole service line, and PWD's pilot program says only the owner can give permission for a replacement. A resident who gets a letter about the line can look the address up on PWD's map and should pass the letter to the owner, who decides and signs. ## Related service ### Multi-unit repiping Supply risers and the branches into each apartment replaced one stack at a time, with water-off windows planned around the people living there and the material the code allows for the building. ## More guides - Learn [How Long Does a Repipe Take When You Are Living in the House?](https://philadelphiafreedomrepipe.com/guide/living-through-a-repipe/)The schedule depends on floors, fixtures, access and the plaster, not on a standard number of days. How the work is staged so the water is off only at cutovers, and what to get ready before the first day. - Cost Guide [How Much Does Repiping Cost in Philadelphia?](https://philadelphiafreedomrepipe.com/guide/repiping-cost-philadelphia/)Typical ranges for a whole-house and a PEX repipe, what sits inside the price, the City's permit fees, and why two quotes for the same rowhouse can differ. - Decision Guide [Can I Get My Lead Service Line Replaced for Free in Philadelphia?](https://philadelphiafreedomrepipe.com/guide/free-lead-line-replacement-philadelphia/)The City routes that can replace a lead or galvanized service line at no charge, who each one reaches, what it leaves to the owner, and what to do if none of them reaches your block. - Decision Guide [How Does the PWD HELP Loan Work for a Water Service Line?](https://philadelphiafreedomrepipe.com/guide/pwd-help-loan/)The Water Department's zero-interest loan for service line and other exterior plumbing work: the terms, who qualifies, the lien on the property, who does the work, and the interior piping it does not cover. - Learn [What Is a Philadelphia Water Department Notice of Defect, and What Do I Do Next?](https://philadelphiafreedomrepipe.com/guide/philadelphia-water-notice-of-defect/)Why PWD sends a Notice of Defect, why the repair falls on the property owner, the ways to pay for it, and what happens when the deadline on the notice passes.