The water service line is the pipe that carries water from the street main into your home — and in older Ypsilanti neighborhoods, that line may be lead or aging galvanized steel. It's a topic worth understanding, both for water quality and for planning. Here's a practical overview.
Why older service lines matter
For much of the 20th century, service lines were commonly made of galvanized steel, and in some older installations, lead. Michigan has been a national focus on lead service line issues, and utilities across the state — including in the Ypsilanti and Washtenaw County area — have been working to identify and replace lead lines. Galvanized lines that were ever connected to lead can also accumulate deposits over the years. If your home predates the 1960s, it's worth knowing what your service line is made of.
How to find out what you have
A few approaches: check with your water utility, which may have records of your service line material; look at the pipe where it enters your home (lead is dull gray, soft enough to scratch, and non-magnetic; galvanized is harder and magnetic); or have a plumber inspect it. If you're unsure, don't guess — a professional can identify the material and its condition.
What it means for your water
Aging galvanized service lines cause the same problems as interior galvanized pipe: reduced pressure, rust in the water, and eventual leaks. Lead lines are a water-quality concern, which is why replacement programs exist. If you're on well water in the rural parts of the county, your concerns shift toward hardness and iron rather than service-line material — different issue, handled with water treatment rather than repiping.
Wondering about your service line? Call +1 (831) 290-4327 for fast, licensed help from Ypsilanti Plumbing Pros.
Your options
If your service line is aging galvanized and causing pressure or rust problems, replacing it with a modern line restores flow and water quality. If it's lead, replacement is the definitive solution, and your utility may have a program or guidance for it. We handle water line and service line replacement, coordinate the required permits, and can replace the line from the meter to the house. For interior plumbing, replacing failing galvanized supply lines with PEX or copper solves the in-home side of the problem.
Ypsilanti's older housing context
Ypsilanti's character comes in large part from its older homes — the century houses near Depot Town, the historic district, and the pre-war neighborhoods. That charm comes with older infrastructure, and service and supply lines are part of it. Across Washtenaw County, we regularly help homeowners understand what they have and plan sensible upgrades. A plumbing inspection, especially before buying an older home, is a smart way to know exactly what's carrying your water.
Practical steps you can take
- Ask your water utility whether they have your service line material on record.
- If you have or suspect lead, follow current public-health guidance on flushing and filtration while planning replacement.
- Have aging galvanized supply lines and service lines evaluated if you have pressure or rust problems.
- Get a plumbing inspection before purchasing an older home so there are no surprises.
What to do while you plan a replacement
If you suspect an older service line, replacement is the definitive fix — but there are sensible steps to take in the meantime. Ask your water utility whether they have your service-line material on record; many have been mapping it. If lead is possible, follow current public-health guidance on flushing the tap after long idle periods and using certified filtration for drinking and cooking water. For aging galvanized causing pressure or rust problems, have the line evaluated so you can budget the service-line replacement rather than being forced into it by a failure. And if you're buying an older home, put a plumbing inspection on your list — it's the cheapest way to know exactly what's carrying your water before you close.
Written by Ypsilanti Plumbing Pros — licensed Michigan master plumbers (State of Michigan Master Plumber License) serving Ypsilanti & Washtenaw County. This article is general guidance, not a substitute for an on-site diagnosis; for an active leak, backup, or gas smell, call +1 (831) 290-4327. Last reviewed June 2, 2026.
Frequently Asked Questions
Check with your water utility for records, inspect the pipe where it enters the home (lead is dull gray, soft, and non-magnetic), or have a plumber identify it. If you're unsure, get it professionally evaluated rather than guessing.
