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Plumbing problems in NJ homes, from drips and clogs to frozen pipes: what you can fix yourself and when to call a licensed plumber.

Most plumbing problems in NJ homes start small, with a drip under the sink, a toilet that runs all night or a drain that gurgles. Picture this: on the coldest night in January, a pipe in your garage freezes and splits, and by morning water covers the floor. Knowing which problems you can handle and which need a licensed plumber saves money and stress. This guide walks you through common issues, simple checks and the clear signs that it is time to call for help.
Key takeaways
Not every drip needs a service call. The EPA’s WaterSense Fix a Leak Week page names worn toilet flappers, dripping faucets and other leaking valves as the most common household leaks. It also says these leaks are often easy to fix with a few tools and some hardware. In fact, fixing simple leaks can save homeowners about 10 percent on their water bills, according to the EPA.
Here are jobs many homeowners take on with confidence:
The EPA suggests checking the flapper from time to time and replacing it at least every five years. A worn one can let a toilet flush on its own or silently leak thousands of gallons a year. The short video below shows how the swap works.
Play video: EPA WaterSense shows how to replace a leaky toilet flapper, one of the most common household leaks.Tip: Take the old flapper, or a photo of it, to the hardware store. That way, you can match the width and style to your toilet model on the first try.
However, stop if a fix does not work or the problem keeps coming back. A repeat leak often has a deeper cause, such as a worn valve seat or a corroded fitting.

Some leaks hide inside walls, under floors or in the toilet tank. According to the EPA, the average household’s leaks waste more than 9,300 gallons of water every year. These quick checks help you find yours:
If the meter keeps moving and you cannot find the source, call a plumber. A hidden leak can damage floors, cabinets and drywall long before you see a stain.
Many small leaks can wait a day or two. However, some plumbing problems in NJ homes cannot wait until the weekend. Call a licensed plumber as soon as you notice any of these:
While you wait, turn off the water at the main shutoff valve. It usually sits where the water line enters the house, often in the basement near the meter. Walk your family through it now, so anyone at home can close it fast.
Watch out: If you ever smell gas near a water heater or boiler, do not try to fix it. Leave the house and call your gas utility or 911 from outside.
Slow drains are a familiar headache in older homes and new ones alike. The trick is to tell a local clog from a bigger blockage. This quick comparison can help:
| Local clog | Main line problem | |
|---|---|---|
| Where | One sink, tub or toilet | Several drains at once |
| Signs | Slow draining at one fixture | Gurgling, or water rising in the lowest drain |
| Common causes | Hair, grease or soap buildup | Tree roots or a damaged sewer pipe |
| Next step | Plunger or drain snake | Call a plumber |
A plumber can clean the main line and find the cause. Meanwhile, go easy on chemical drain cleaners. They can be risky to handle, and they will not clear tree roots or a broken pipe.

Water heaters tend to give warnings before they fail. So watch for these signs:
A leak from the tank itself usually means it is time for a replacement. Still, a plumber should confirm the cause first, because a loose fitting or valve can look the same.
New Jersey note: A Department of Community Affairs bulletin lists replacing a water heater with a new one of like capacity as “minor work.” Minor work needs a construction permit, but the job can start once the local code office has been notified. By contrast, replacing a faucet or clearing a stoppage counts as ordinary maintenance, with no permit.
Frozen pipes are a classic New Jersey winter headache. The American Red Cross explains that water expands as it freezes, which puts enough pressure on metal or plastic pipes to break them. Pipes in garages, crawl spaces, attics and outside walls freeze most often. Its frozen pipe guide recommends these steps:
If a faucet only trickles, suspect a frozen pipe. Keep the faucet open and warm the pipe with a hair dryer or heating pad, but never with an open flame. If you cannot find the frozen spot or thaw it safely, the Red Cross advises calling a licensed plumber.

Not always. A running toilet often has a worn flapper, which is an inexpensive part you can replace yourself. However, if a new flapper does not stop the noise, or the tank fills slowly, a plumber can check the fill valve and other parts.
A slow drain, a dripping faucet or a running toilet can usually wait for regular hours. On the other hand, a burst pipe, a sewage backup or a leaking water heater tank needs fast help. When in doubt, shut off the water and call.
Yes. A state code bulletin lists like-for-like water heater replacement as minor work, which needs a construction permit. Work may begin once the local code office has been notified. Ask your plumber to handle that paperwork as part of the job.
Ask neighbors for names, then check a few details. Ask for the New Jersey license number and proof of insurance. Also ask whether they offer emergency service, who pulls permits and whether you will get a written estimate before work begins.
Peter Travisano is with Travisano Plumbing and Heating, a West Caldwell company that has served customers in Northern New Jersey since 1999. The business handles everyday plumbing repairs, drain and sewer main cleaning, and boiler and water heater installation and repair. It also installs sump pumps, replaces water lines and takes on kitchen and bathroom remodeling. In addition, it offers emergency service 24 hours a day.
So if you face plumbing problems in NJ that you cannot fix yourself, visit Peter’s profile to call, email or request an introduction. He is part of our Home Projects & Repairs referral team. There you can also meet Tim Fisher for home improvements and custom carpentry, and pest control pro Greg Bubb, since moisture can attract pests. For more local help, browse our Home Services & Contractors members.
This article is general information, not professional plumbing advice. Every home’s plumbing is different, so speak with a licensed New Jersey plumber about your situation.
Tell us a little about what you need. We will pass it to Peter, who will get back to you directly. No cost, no obligation.