# Patch a Leak or Repipe the House? | KL Plumbing Handbook > When spot repairs make sense and when full repiping is better: repeat leak patterns, pipe age and material, disruption and cost factors. URL: https://klplumbing.my/guide/pipe-repair-or-repiping/ Last-Modified: 2026-11-15 Author: KL Plumbing Handbook editors ## Two very different jobs A repair fixes one leak. Repiping replaces most or all of the water pipes in the house. In older houses, a leak is often a sign that the whole system is wearing out. Patching one leak at a time can turn into a long, costly cycle. Repiping costs more upfront, but it can end that cycle. We see this repiping vs repair question come up often with landed house owners in the Klang Valley. Below, we cover the leak patterns that matter, pipe age, disruption, cost and the questions to ask a plumber. It is part of the Pipe Replacement section [/pipe-replacement/ →](/pipe-replacement/) . ## Look at the leak pattern Several leaks in different places within a year or two is the clearest sign to consider repiping. One leak on otherwise sound pipe is usually just a repair. | Pattern | Suggests | | --- | --- | | One leak on otherwise sound pipe | Repair | | A leak at a joint after a nearby renovation | Repair | | Several leaks in different places within a year or two | Consider repiping | | Leaks on old GI pipe, with brown water and weak flow | Strongly consider repiping | | Repeat leaks on the same hot water line | Replace that line at least | ![New exposed pipes clipped neatly along a utility wall of a terrace house](/images/content/new-exposed-pipes-clipped-neatly-along-a-utility-w.webp) Keep a simple note of each leak: the date, the location and the pipe material. A written history makes it much easier for a plumber to judge whether you are fixing a one-off or a trend. ## Pipe age and material Old galvanised iron (GI) pipe is the main reason a house ends up needing a full repipe. Plastic pipe, such as PVC, uPVC or PPR, rarely does. Older landed houses, especially in mature areas such as parts of Petaling Jaya, may still have GI pipes. GI rusts from the inside. Plumbing sources commonly put its lifespan at around 40 to 60 years, and hard water or poor conditions can shorten that. The rust narrows the pipe, colours the water and eventually eats through the wall. Leaks often start at the threaded joints first, because the pipe wall is thinner there. Once a GI system leaks in several places, more leaks usually follow. Our guide on brown or rusty tap water [/guide/brown-rusty-tap-water/ →](/guide/brown-rusty-tap-water/) covers the signs. Newer homes usually have plastic pipes. These do not rust. Leaks in them are more often at joints, or from damage, poor installation or the wrong material on a hot line. Plastic systems are more often repaired than repiped. Our comparison of PVC, PPR and copper pipes [/guide/pvc-vs-ppr-vs-copper-pipes/ →](/guide/pvc-vs-ppr-vs-copper-pipes/) explains the materials. ## Disruption: hacking versus exposed routing Repiping does not always mean hacking every wall. The routing you choose decides how much mess you get. **Concealed routing** buries the new pipes in walls and floors, like the old ones. It looks neat but needs more hacking, plastering and re-tiling. **Exposed routing** runs the new pipes along wall surfaces, fixed with clips, and sometimes boxed in or painted. It means much less hacking and makes future repairs easy. It is common in service yards, under sinks and along ceilings. ![New white PPR pipes running neatly along a bathroom wall surface in clips after repiping an older Klang Valley house](/images/content/new-white-ppr-pipes-running-neatly-along-a-bathroo.webp) Many repiping jobs use both: exposed where it does not matter, concealed in visible areas. If a bathroom has fresh tiles you love, ask the plumber whether that run can go exposed in the yard instead. ## Cost factors There is no single price for repiping, because every house is different. These are the things that move the cost: - The size of the house and the number of bathrooms and taps - Concealed or exposed routing - Pipe material - Hacking, plastering and re-tiling - Access, such as roof spaces and built-in cabinets - Whether the tank, valves and fittings are replaced at the same time Partner price for reference: KL1 Plumber [https://kl1plumber.com/ →](https://kl1plumber.com/) publishes a price of RM65 to RM250 per metre to replace PVC pipe, read from its price list on 15 November 2026. Repiping a house involves many metres plus fittings, making good and other work. Ask for a written quote that breaks it down, so you can compare two plumbers line by line. ## What repiping usually involves A typical repiping job runs in seven steps. The pressure test in step 5 is the one to insist on. 1. **Survey.** The plumber traces the existing pipes, checks the material and plans the new routes. 2. **Plan the stages.** Which areas first, how long the water will be off each day, and where temporary supply comes from. 3. **Run the new pipes,** usually from the meter or tank outwards, either in new channels or along surfaces. 4. **Connect fixtures** such as taps, toilets, the heater and the tank. 5. **Pressure test** the new system before anything is closed up. 6. **Disconnect the old pipes,** which are usually capped and left in the wall if they are not in the way. 7. **Make good** where walls and floors were opened. On larger houses, the work can run over several days. Ask for a plan that keeps at least one bathroom working each evening. ## Questions to ask before you decide Ask these before you sign anything. Clear answers are a good sign, and vague ones tell you to keep looking. - What material do you recommend for cold and hot lines, and why? - Which runs will be exposed and which concealed? - Will the old pipes be removed or capped? - Does the quote include the supply pipe from the meter, the tank connections and new valves? - How long will the water be off, and in which stages? - Is making good included, and does it cover tiles? - What warranty covers the new pipes and joints? ## When repairing still makes sense Repair is the right call when the system is basically sound and the problem is local. In these cases, repiping would be money spent for little gain: - The pipes are relatively new plastic - The leak is at a single joint or a damaged section - You plan a full renovation soon, when repiping can be done with less extra disruption - The leak is on an exposed pipe that is easy to replace ## Permits Yes, repiping needs a licensed plumber. In Malaysia, that means a plumber with an IPA Type A permit from SPAN. SPAN’s rules cover the construction, connection, modification and repair of water pipes and fittings that carry water from the public mains. So even a simple repair falls under the same rule. Ask for the permit details before you agree to the work. Our guide on how to check a plumber’s SPAN permit [/guide/check-plumber-span-permit/ →](/guide/check-plumber-span-permit/) explains how. ## Landed house and condo notes Your ownership rules depend on the type of home. **Landed house.** All pipes after the meter are yours. Repiping can include the underground supply from the meter to the house. **Condo unit.** You can usually repipe inside your unit, but not the shared risers. Check building rules on hacking, noise hours and contractor registration first. ## When to call a plumber Call a plumber for an assessment if you have had several leaks, brown water or weak flow in an older house. That combination is the usual cue to look hard at repiping vs repair. Ask them to show you the pipe material and condition. Ask for a quote for both a repair and repiping, so you can compare the two. Get the scope, routing, material, making good and warranty in writing. If you are not sure which side your house falls on, send us your leak history and we will help you read it. ## Questions people ask How many leaks before repiping?expand\_more There is no fixed number. What matters is the pattern. Repeated leaks in different places on old pipe, especially old galvanised iron, point towards repiping. One leak on otherwise sound pipe is usually a repair. Can pipes run outside the wall?expand\_more Yes. Exposed routing, with pipes fixed along the wall surface and sometimes boxed in, means much less hacking than burying new pipes in the walls. It also makes future repairs easier. The trade-off is appearance. Do I need a permitted plumber?expand\_more Yes, for work on pipes carrying water from the public mains. That work needs a plumber with an IPA Type A permit from SPAN. Ask for the permit details before you agree to repiping. Can I repipe in stages?expand\_more Often, yes. Some owners replace the worst sections first, such as the supply pipe from the meter or the pipes to one bathroom, and do the rest later. Ask the plumber to plan the stages so the new pipes connect cleanly. Keep reading Learn more about pipe replacement When old pipes should be replaced, pipe materials, and what repiping involves. Open the Pipe Replacement section [/pipe-replacement/ →](/pipe-replacement/) About the authors KL Plumbing Handbook editors The KL Plumbing Handbook editors write plain-language guides on home plumbing problems, repair costs and hiring a plumber for homes in Kuala Lumpur and the Klang Valley. Each guide covers one problem and states the source and date of every cost figure. Spotted an error? Send a correction [/contact/ →](/contact/) . See our editorial policy [/editorial-policy/ →](/editorial-policy/) . ## Related guides Brown or Rusty Tap Water Is brown water from the supply or your own rusting pipes? After a water cut vs persistent, one tap vs all, GI pipes and tank sediment. Read guide arrow\_forward [/guide/brown-rusty-tap-water/ →](/guide/brown-rusty-tap-water/) PVC vs PPR vs Copper Pipes Compare uPVC/PVC, PPR, copper and PE pipes for KL homes: hot water suitability, jointing methods and what affects lifespan. Read guide arrow\_forward [/guide/pvc-vs-ppr-vs-copper-pipes/ →](/guide/pvc-vs-ppr-vs-copper-pipes/)