If you’ve noticed a sudden drop in water pressure or changes in the taste, smell, or clarity of your tap water, your plumbing system may be trying to tell you something. Older water lines—especially those made from outdated or corroded materials—can have a direct effect on both the pressure and quality of your water.
At Service Plumbing & Heating, we specialize in water service line repair and replacement and understand how aging infrastructure can compromise your plumbing system. Whether you’re dealing with slow-running fixtures or discolored water, here’s what you need to know about the effects of old water lines—and when it’s time to replace them.
How Do Old Water Lines Affect Water Pressure?
Water pressure is one of the most noticeable indicators of plumbing performance. When water lines start to age and deteriorate, several issues can lead to a noticeable drop in pressure throughout your home or commercial building.
1. Internal Corrosion Reduces Flow Capacity
Over time, pipes—especially galvanized steel or iron—can corrode on the inside. As rust and buildup accumulate, the internal diameter of the pipe shrinks, reducing the volume of water that can flow through. This often leads to weaker pressure at sinks, showers, and appliances.
2. Mineral Buildup From Hard Water
In areas with hard water, mineral deposits like calcium and magnesium can gradually build up inside pipes. These deposits restrict flow and contribute to inconsistent water pressure.
3. Hidden Leaks In Aging Pipes
Small cracks or pinhole leaks caused by corrosion or shifting soil can result in water escaping before it reaches your fixtures. Even a minor leak in a main service line can significantly reduce overall water pressure.
How Do Old Water Lines Impact Water Quality?
In addition to performance issues, outdated water service lines can also pose serious risks to your water quality.
1. Rust & Sediment In Tap Water
Rust from corroded pipes can cause water to appear brown, red, or orange. This discoloration is often accompanied by an unpleasant metallic taste and can stain sinks, tubs, and laundry.
2. Potential For Lead Contamination
Some older homes and buildings may still have lead service lines or solder joints. Even in small amounts, lead in drinking water is dangerous, especially for young children and pregnant women.
3. Bacteria & Biofilm Growth
Cracks in aging pipes can allow bacteria and contaminants to enter the system. Slow-moving water in corroded or partially blocked lines can also encourage bacterial growth and biofilm, affecting both taste and safety.
When To Replace Old Water Lines
If your water pressure is low or your water quality has declined, it may be time to replace your main water service line. At Service Plumbing & Heating, we recommend scheduling an inspection if you notice:
- Persistent low water pressure
- Discolored or foul-tasting water
- Spikes in your water bill without increased usage
- Signs of corrosion or leaks
- A service line that is 40+ years old
Upgrade To Modern, Reliable Plumbing With Service Plumbing & Heating
Replacing old water lines is one of the most effective ways to restore strong water pressure and improve water quality in your home or commercial property. At Service Plumbing & Heating, we provide expert water service line installation and repair for residential, commercial, and healthcare clients throughout the region.
Our Water Line Services Include:
- Comprehensive system inspections
- Trenchless and traditional water line replacement
- High-efficiency pipe materials (such as copper or PEX)
- Water pressure testing and flow diagnostics
- Solutions tailored to your property and budget
With decades of experience and a reputation for reliable, honest work, we’ll make sure your plumbing system performs the way it should.
Schedule a Water Line Inspection With Service Plumbing & Heating In Lynnwood, WA
Don’t let aging water lines compromise your comfort, safety, or water quality. If you’re experiencing any of the warning signs, reach out to Service Plumbing & Heating for a professional evaluation. We’ll diagnose the issue, explain your options, and provide long-lasting solutions that restore your system to peak performance. Contact us today to schedule your inspection or learn more about our water line services.
