Quick answer
Common signs include repeated leaks or pinhole leaks, falling water pressure, discolored water, and supply pipes made of galvanized steel, polybutylene, or lead. One leak does not mean you need new pipes, but a pattern of failures, or a known problem material, is a reason to have a plumber assess the whole system.
Repairing a pipe versus repiping
A single leak at a fitting or a damaged section can usually be repaired. Repiping makes sense when the pipe material itself is the problem, or when failures keep happening in different places.
The signs below are not a diagnosis. Only an inspection of your actual plumbing can tell you whether repair or replacement is the better path.
Sign 1: Repeated leaks
Leaks in supply pipes matter because those pipes are under constant pressure. HouseLogic notes that leaks in supply lines can cause significant water damage, and that hard water or poor maintenance can shorten a pipe's life.
One repair is routine. If you have fixed a leak and another appears elsewhere a few months later, or you find tiny pinhole leaks along a run, the pipe may be wearing out as a whole. Mark the spots and tell your plumber about each one.
Sign 2: Low water pressure
If pressure has dropped throughout the house, and not at one fixture, the cause could be in the pipes. Inspectors report that galvanized steel supply pipe corrodes on the inside as it ages, which narrows the path for water and reduces pressure and volume. In time, the pipe walls can fail and cause flooding.
Low pressure at a single faucet is more often a clogged aerator or a fixture issue. Check that first.
Sign 3: Discolored water
Brown or rust-colored water can have several causes. If it comes only from the hot tap, the water heater may be corroding. Rheem notes that rust-colored water can point to corrosion inside the tank or a worn anode rod.
If both hot and cold water are discolored, especially after the water has sat in the pipes for a while, corroding pipes are a possible cause. A plumber can help tell the difference. If the water also tastes or smells unusual, contact your water utility.
Sign 4: The pipe material
Some materials are known for problems. If you know what your home is piped with, you can judge your risk better.
- Galvanized steel: HouseLogic gives a typical lifespan of 20 to 50 years for galvanized supply pipe. Inspectors report that aging galvanized pipe corrodes on the inside and can restrict flow.
- Polybutylene (PB): a gray plastic pipe, also sold in other colors, produced from 1978 to the mid-1990s according to the home inspector association InterNACHI. Studies cited by InterNACHI found that certain water disinfectants can react with PB and cause flaking and cracks that can deepen until water escapes. A loss-control bulletin from an insurer notes the cause is not settled, and that most leaks occur at joints. Either way, PB can fail without warning, and internal deterioration generally cannot be seen without dismantling the pipe.
- Copper: lifespan figures vary by source, and water conditions and installation quality matter. If you find pinhole leaks or damp spots at joints, ask a plumber to assess the run.
- Lead pipes and solder: see the next section.
Lead pipes and service lines
The EPA says lead enters tap water when plumbing containing lead corrodes. Lead pipes, faucets, fixtures, and lead solder are the usual sources. Lead service lines, the pipes that connect your home to the water main, are typically the largest source of lead in water where they exist. The EPA says lead pipes are more likely in older cities and in homes built before 1986.
You cannot see, smell, or taste lead. The EPA says testing is the only reliable way to know whether it is in your water, and recommends a certified laboratory. EPA's Protect Your Tap guide helps you identify pipe materials using a penny or key and a magnet, and your water utility or a licensed plumber can also tell you what your service line is made of.
Until you know, the EPA suggests using only cold water for drinking, cooking, and baby formula, cleaning faucet aerators regularly, and running the tap before drinking if water has sat in the pipes. Boiling does not remove lead. The EPA notes that some states and utilities offer programs that help pay for testing or lead service line replacement. Ask your utility who is responsible for each part of the line, because replacing plumbing inside the house is separate from the service line.
What repiping involves in general terms
Repiping replaces the supply lines inside the home with new pipe, and connects them to your fixtures, water heater, and shutoff valves. Exact steps depend on the house, the new material, and access to the old pipes.
In general, expect the following. Your plumber will assess the existing system and the layout. Water will be shut off during the work, so plan for periods without it. Small openings in walls, ceilings, or floors are often needed to reach the old pipes, and these may need patching afterward. The new system is typically tested for leaks before it is put into service.
Ask for a clear written scope, the pipe material proposed, what repairs to walls are included, and whether permits and inspections apply in your area.
What to do if you suspect a problem
Note the age of your home and what pipe materials you can see near the water heater, under sinks, and where the main line enters. Keep a record of each leak and its location. Check your water pressure at several fixtures, and look at the color of the water when you first open the tap.
If a pipe is actively leaking, shut off the water at the main valve. If it is near electrical outlets or panels, stay clear and call an electrician. Pyper does not do electrical or gas line work. If you smell gas, leave and call 911 or your gas utility.
When to call Pyper Plumbing
Call us if you have had several leaks, if pressure has dropped throughout the house, or if you have galvanized or polybutylene pipe and want an assessment. We repair leaks and also repipe homes. We will tell you what we see and whether a repair or a full repipe makes sense.
We do not handle septic, well pumps, gas lines, HVAC, or electrical work. For lead concerns, contact your water utility about testing and service line information, and we can help with the plumbing inside your home.
Common questions
How do I know if I have polybutylene pipes?
PB is usually gray, though other colors exist, and was used from 1978 to the mid-1990s. Check near the water heater, in basements, and under sinks. A plumber or inspector can confirm the material. Copper stubs at fixtures do not rule out PB elsewhere.
How long do galvanized pipes last?
HouseLogic lists 20 to 50 years for galvanized supply pipe. As they age, they corrode inside, which can reduce pressure and volume, and the pipe may eventually fail.
Can I tell if I have a lead pipe?
HouseLogic notes that lead pipes look dull gray and scratch easily with a key. EPA's Protect Your Tap guide explains a penny or key and magnet check. Testing at a certified lab is the only way to confirm lead in your water.
Does one leak mean I need to repipe?
No. A single leak can often be repaired. Repiping is worth considering when leaks keep appearing in different places, or when the pipe material is known to fail.
Sources
Facts in this guide come from the following references. Local rules and manufacturer instructions can differ, so follow your utility and your equipment manual.
- HouseLogic: Types of Plumbing Pipes and Their Lifespans
- InterNACHI: Polybutylene for Inspectors
- PHLY loss control bulletin: Polybutylene Piping
- Carson Dunlop: Galvanized Steel Supply Plumbing (inspection report template)
- EPA: Basic Information about Lead in Drinking Water
- EPA: Protect Your Tap, A Quick Check for Lead
- EPA: Lead Service Line Replacement
- Rheem: 5 Signs Your Water Heater Is Going Bad
This guide is general information, not a substitute for an on-site inspection. If you smell natural gas, leave the building and call 911 or your gas utility. Pyper does not perform gas line work.
