Low pressure at every tap in an older New Jersey house is usually not the fixtures and not the town's main. It is often the service line itself closing up from the inside, and if that line is galvanized, New Jersey law says something surprising about it: a galvanized service line is legally considered a lead service line, and it is on the clock for replacement.
That last part is worth knowing before you pay anybody, because it can change who carries the bill.
First, one fixture or the whole house?
This is the question that splits the problem in two, and it takes five minutes.
One fixture. A single slow faucet or shower is an aerator, a cartridge, a supply valve or a clogged head. It is not the buried line, and it is not us. A plumber will usually fix it in one visit.
The whole house, and it came on gradually. Now you are looking at the pipe that feeds everything. Gradual is the key word. Pressure that has faded over years rather than dropped overnight is the signature of a line that is getting narrower, not one that has broken.
The whole house, and it dropped suddenly. That is a different animal: a partly closed valve, a pressure regulator that has failed, work on the utility's main, or a break. If it is sudden, call your water utility before you assume anything about your own pipe. The number for your town is on who supplies water in your NJ town.
Why galvanized closes up
Galvanized steel pipe is steel with a zinc coating. The zinc is what protects it, and over decades the water wears that coating through. Once it does, the steel underneath begins to rust, and the rust does not fall away. It builds inward, layer on layer, in a process called tuberculation, until the usable opening is a fraction of what the outside of the pipe suggests.
The practical result is a pipe that looks perfectly healthy from the outside, holds pressure fine, does not leak, and still cannot deliver. You get pressure but not volume. Run two fixtures at once and it becomes obvious. That is the classic tell, and it is why replacing fixtures never fixes it.
It also tends to show as rusty or discolored water first thing in the morning or after the house has sat empty, because that is when the water has been standing against the corroded surface longest.
What New Jersey law says about galvanized
Here is the part almost nobody knows. Under P.L.2021, c.183, the state's lead service line law:
“A galvanized service line shall be considered to be a lead service line.”
The law defines a lead service line as a water supply connection made of, or lined with, a material consisting of lead, which connects a water main to a building inlet. Galvanized is folded into that definition by the sentence above. And the law requires community water systems to identify and replace all lead service lines within ten years of its 2021 effective date, with a possible extension to fifteen.
On who pays, the law treats two kinds of utility differently, which is why the answer depends on whose name is on your bill:
- Investor-owned systems, the private companies: the law says the proportionate share of project costs for replacing the property-owner side of a lead service line is treated as an operation and maintenance cost and recovered from all customers through surcharges, rather than from the individual property owner.
- Government-owned systems, the municipal utilities and authorities: costs may be borne by all of the customers, or assessed to individual properties as local improvements.
So if your service line is galvanized, the replacement may not be your bill at all, and if you are on a private company it is less likely to be. That is a conversation to have with your utility before you hire anyone.
The honest local picture
We read the actual inventories the local systems filed with the state rather than repeating national scare copy, and the numbers do not support panic. Across the three nearby towns that publish a file: Hamburg has finished its inventory with zero lead and zero galvanized across 1,557 lines. Franklin Borough has nine galvanized lines, all of them on the customer side. Newton has one.
But the same filings carry a much bigger number: 2,886 lines across Franklin and Newton have never been looked at. Unknown is not a synonym for safe. It means nobody has confirmed the material yet, and galvanized is one of the things that hides in an unknown.
Which is why, here, the first job is almost never replacement. It is identification. That is covered in full on lead and galvanized service lines in New Jersey, including how to check your own pipe with a key and a magnet.
What the law does not cover
This trips people, and it matters because it is the difference between a bill you might not owe and one you certainly do.
The law is about the service line: the connection from the water main to the building inlet. Galvanized plumbing inside the house, the branch lines running through walls and up to fixtures, is not a service line and is not covered. Plenty of older homes have both, and it is entirely possible to have the service line replaced and still have weak pressure upstairs because the interior galvanized is what is actually strangled. That interior work is a plumber's repipe, not an excavation job, and we would rather tell you that before we dig than after.
Reading the symptom
| What you have | Usually points to | Who to call |
|---|---|---|
| One fixture slow, rest fine | Aerator, cartridge or supply valve | Plumber |
| Whole house, faded over years, old home | Galvanized closing up, service line or interior | Utility first, to ask about the service line material |
| Whole house, dropped suddenly | Valve, pressure regulator, or utility-side work | Your water utility |
| Pressure fine alone, collapses with two fixtures | Restricted diameter somewhere in the supply | Plumber, then us if it is the buried run |
| Rusty water after the house sits | Corroded galvanized surface somewhere in the supply | Utility, then a plumber |
| Low pressure plus a wet spot outside | Something more urgent than pressure | Utility immediately, to shut the curb valve |
Replacing a buried service line runs $8,000 to $10,000 for a 200 foot service in northern New Jersey, quoted against a stated length because the length is most of the job. Details on water service replacement.
Common questions
Why is my water pressure low throughout the whole house? In an older home the usual cause is a supply pipe that has narrowed from the inside rather than anything wrong with the fixtures. Galvanized steel rusts inward as its zinc coating wears through, and the rust builds up until the usable opening is a fraction of the pipe's outside diameter. The tell is that pressure seems acceptable at one fixture and collapses the moment you run two. If the drop was sudden rather than gradual, suspect a valve, a failed pressure regulator or utility-side work instead.
Is a galvanized water service line considered a lead line in New Jersey? Yes. P.L.2021, c.183 states plainly that a galvanized service line shall be considered to be a lead service line. That puts it inside the state's requirement for community water systems to identify and replace lead service lines within ten years of the 2021 effective date, with a possible extension to fifteen.
Who pays to replace a galvanized service line in NJ? It depends on what kind of utility serves you. For investor-owned systems, the private companies, the law treats the property-owner side of the replacement as an operation and maintenance cost recovered from all customers through surcharges rather than billed to the individual owner. For government-owned systems, municipal utilities and authorities, the cost may be spread across all customers or assessed to individual properties as a local improvement. Ask your utility before hiring anybody.
Does the law cover the galvanized pipes inside my house? No. The law applies to the service line, the connection from the water main to the building inlet. Interior galvanized branch lines running through your walls are not service lines and are not covered. Many older homes have both, which is why a service line replacement sometimes does not fully solve the pressure problem. The interior side is a plumber's repipe.
How much galvanized is actually out there around here? Less than the national coverage suggests. Of the nearby towns that have published inventories, Hamburg reports zero galvanized and zero lead across 1,557 lines, Franklin Borough reports nine galvanized lines, all customer side, and Newton reports one. What is large is the unknown pile: 2,886 lines across Franklin and Newton have not been checked at all. Unknown does not mean safe, it means unexamined.
Can I tell what my service line is made of myself? Often yes, where the pipe enters the building, with a key and a magnet. A magnet sticks to galvanized steel and does not stick to lead or copper, and lead scratches to a soft bright silver. The full method is on our lead and galvanized service line page.
Still not sure how this applies to your property? That is what a free on-site estimate is for. Call 862-268-2510 or tell us what is going on, and we will give you a straight answer, including when the answer is that you do not need us.
Code and source references
- P.L.2021, c.183, New Jersey's lead service line replacement law, including the galvanized provision and the cost treatment for investor-owned and government-owned systems
- NJDEP, lead service line replacement
- Local inventory figures read from each town's own filing: see lead and galvanized service lines in New Jersey
- Water purveyor contacts by town: who supplies water in your NJ town
This is general information from an excavation contractor. We are not your water utility, not a plumber and not NJDEP, and what a particular utility will pay for is a question only that utility can answer.