Plumbing help · free, from a master plumber
What's going on with your plumbing?
Straight answers to the problems we get called about every week in Central New Jersey. Fix the small stuff yourself, and we'll tell you exactly when to stop and call.
People ask: Sewer Backup in the BasementHow to Fix a Leaky Faucet in 6 StepsHow Long Does a Water Heater LastAre Flushable Wipes Really FlushableHow to Tell If Your Pipes Are Frozen
Is this an emergency?
If it's one of these, skip the reading. Do the first steps now, then call. Save or print the emergency guide
Leaking pipe
- Shut the main water valve.
- Don't enter standing water or touch electrical controls near the leak.
- Move valuables and start soaking up.
No water at all
- Ask a neighbor if they have water.
- If they do, check that your main valve is fully open.
- In winter, a pipe may be frozen. Never use a torch.
- This can usually wait until morning, unless someone in the home can't do without water overnight.
Sewage coming up
- Stop running water and flushing.
- Keep kids and pets away from it.
- Don't pour chemicals down the drain.
You smell gas
Leave the house first. Don't flip switches or use your phone inside. From outside, call 911 and your gas utility. Plumbing Doctor can discuss eligible repair work after the utility/authorities declare the site safe; scope of the repair work requires confirmation.
Call 911No guide matches that yet. Call 908-873-6686 and ask us.
Sewer & main line
Backups, sewer smells, camera inspections
- Know when to call
Start here
Sewer Backup in the Basement? What to Do in 6 StepsStop all water use, isolate the area, keep children and pets out, skip the chemical drain cleaners and stay out of floodwater near electrical equipment. What to do when sewage backs up, and who to call.
- Sewer Smell in the House? 6 Places to CheckKnow when to call
A sewer smell usually comes from a dry drain trap, a failing toilet seal, a blocked vent, a loose cleanout cap or buildup in a drain. Six places to check, in order, and when the smell means a bigger problem.
- Sewer Camera Inspection: What It Is, What It Finds and When You Need OneKnow when to call
A sewer camera inspection shows what's inside your sewer line: roots, cracks, sags, grease or a collapsed pipe. What it finds, when it's worth it, and what happens after.
Stop and call if sewage comes up through a floor drain, tub or toilet. Stop using water and call. 908-873-6686
Toilets & faucets
Clogged, running, not filling, dripping
- DIY · 6 steps
Start here
How to Fix a Leaky Faucet in 6 Steps (Any Type)Shut off the water, plug the drain, find out which kind of faucet you have, then replace the worn washer, O-ring or cartridge. How to fix a dripping faucet, and what a leak at the base means.
- How to Fix a Running Toilet in 6 Steps (and Stop the Hissing)DIY · 6 steps
A running or hissing toilet is almost always a leaking flapper, a chain that's too short or a fill valve set too high. How to find which one with a dye test and fix it in under an hour.
- Bad Toilet Flange: Signs, Causes and How It Gets FixedKnow when to call
A rocking toilet, water at the base or a sewer smell in the bathroom often means a broken toilet flange. The signs, what causes it, and how a flange is repaired or replaced.
- Toilet Tank Not Filling? How to Fix It in 6 StepsDIY · 6 steps
A toilet tank that won't fill usually has a half-closed supply valve, a clogged or worn fill valve, a float set too low or a leaking flapper. Here's how to find the cause and fix it.
- How to Unclog a Toilet in 5 Steps (Without Making It Worse)DIY · 5 steps
Stop the water, use a flange plunger the right way, try warm water and dish soap, then a toilet auger. How to unclog a toilet safely, and the signs the clog is in the main line.
- Shower Diverter: How It Works, the 3 Types and Signs It's FailingKnow the signs
A shower diverter sends water from the tub spout up to the shower head. How each type works, the signs it's wearing out, and when to repair or replace it.
Stop and call if water is leaking around the base of the toilet or through the ceiling below. 908-873-6686
Water heaters
No hot water, temperature, flushing, leaks
- Know when to call
Start here
How Long Does a Water Heater Last? How to Tell When Yours Is DoneMany tank water heaters last somewhere around 8 to 12 years, but it varies. How to find your heater's age, the signs it's near the end, and what can help it last longer.
- How to Flush a Water Heater: Risks and When to CallKnow when to call
Flushing a tank water heater can clear sediment, but it involves scalding water, an aging drain valve and the heater's gas or electric supply. What to check, what can go wrong and when to call a plumber.
- How to Turn Up (or Down) Your Water Heater TemperatureKnow when to call
120°F is a common delivery target at the tap, not a universal storage setting. How to adjust a gas or tankless water heater with its outside controls, check the tap, and why electric heaters and mixing valves call for a plumber.
- No Hot Water? 6 Safe Things to Check Before You CallKnow when to call
No hot water can mean a pilot that's out, a tripped breaker, a failed part or a tankless unit showing an error. What to look at on gas, electric and tankless water heaters without removing covers, and when to call.
- Water Heater Anode Rod: What It Does and When to Service ItKnow when to call
The anode rod wears away so your water heater tank doesn't rust. What it does, the signs it's used up, what you can safely look for, and why replacing it is professional maintenance.
- Water Heater Expansion Tank: What It Does and When to CallKnow when to call
An expansion tank gives hot water room to expand so pressure doesn't build up in your pipes. What it does, what you can spot by looking, and why a qualified plumber sizes, installs and tests it.
- Water Heater Leaking? What to Do Right Now and How to Find the LeakKnow when to call
Stay out of standing water, close the cold water valve if you can reach it safely, then look for the source from a safe spot. A leaking fitting can often be fixed. A leak from the tank itself means the water heater needs to be replaced.
- Water Heater Noises: Popping, Rumbling, Whistling and What They MeanKnow when to call
What popping, rumbling, hissing, whistling, ticking and humming from a water heater mean, which noises are normal, which need a plumber, and why clearing sediment is a job to do by the manufacturer's instructions.
- Types of Water Heaters: Tank, Tankless, Heat Pump and More, ComparedKnow when to call
Gas or electric tank, tankless, condensing, heat pump or solar: how each type of water heater works, what to expect from it, and which ones Plumbing Doctor installs, services or doesn't work on.
Stop and call if you smell gas near the heater, the tank is leaking, or the relief valve keeps dripping. 908-873-6686
Drains & disposals
Slow, clogged, smelly or backing up
- DIY · 5 steps
Start here
Are Flushable Wipes Really Flushable? What Happens in Your PipesFlushable wipes go down the toilet, but they don't break apart like toilet paper. Why they clog pipes and sewer lines, a simple jar test, and what to do if wipes clogged your toilet.
- Dishwasher Not Draining? 6 Things to Check Before You CallKnow when to call
Standing water in the dishwasher can come from a dirty filter, a full garbage disposal, a kinked drain hose, a clogged air gap or a clog in the kitchen drain. What you can check, and what to leave to a plumber.
- Garbage Disposal Not Working? How to Reset and Fix It in 5 StepsKnow when to call
Humming, silent or stuck: many garbage disposal problems are a jam or a tripped overload. Disconnect power before you investigate a jam, never put your hand inside, and know when it's time to call.
- How to Clean a Garbage Disposal (and Fix One That Won't Work)Know when to call
Clean a garbage disposal safely with ice, salt, baking soda and a brush. Disconnect power before you investigate a jam, never put your hand inside, and know when a stuck disposal needs a plumber.
- How to Unclog a Drain in 5 Steps (Without Chemicals)DIY · 5 steps
Clean the stopper, flush with hot tap water, plunge, snake, then clear the P-trap. Five steps to unclog a sink, tub or shower drain, and the signs the clog is in your main sewer line.
- How to Unclog a Kitchen Sink in 6 Steps (Double Sinks and Disposals Too)DIY · 6 steps
Check the garbage disposal, plug the other side of a double sink, plunge, clean the P-trap and snake the line. How to unclog a kitchen sink without chemicals, and when it's the main line.
- How to Keep Drains From Clogging: 8 Simple HabitsDIY · 8 steps
Keep grease and food out of the sink, catch hair before it goes down, flush only toilet paper and clean stoppers once a month. Eight habits that keep kitchen, bathroom and main drains running.
- How to Unclog a Shower or Tub Drain in 6 StepsDIY · 6 steps
Take off the drain cover, pull out the hair, use a zip tool, then plunge or snake it. How to unclog a shower or bathtub drain without chemicals, and how to keep hair out of it.
- Sink Stopper Stuck? How to Remove and Fix It in 5 StepsDIY · 5 steps
A stuck bathroom sink stopper is usually held by a pivot rod under the sink or clogged with hair. Here's how to get it out, clean it and put it back so it opens and closes properly.
- Bath and Shower Habits That Cause Plumbing Problems (and What to Do Instead)Know the signs
Hair down the drain, flushable wipes, drop-in tank tablets and a heavy caddy on the shower arm. The everyday bathroom habits that lead to clogs, leaks and repairs, and easy swaps for each.
- Can You Pour Cooking Oil Down the Drain? What to Do InsteadKnow the signs
Cooking oil and grease cool and stick inside your pipes, even with hot water and soap. Why oil clogs drains, how to get rid of it safely, and what to do if the sink is already slow.
- Does Coke Unclog Drains? 8 Plumbing Myths a Plumber Hears Every WeekKnow the signs
Coca-Cola, baking soda and vinegar, ice cubes in the disposal, flushable wipes: what actually happens in your pipes, and what to do instead.
- Snaking vs. Hydro Jetting: Which Does Your Drain Need?Know the signs
A drain snake works through a clog. Hydro jetting uses high-pressure water on the pipe walls. The right method depends on pipe material, condition, the obstruction and access.
Stop and call if more than one drain is slow at once, or water comes up in the tub when you flush. That points to the main line. 908-873-6686
Winter, storms & seasons
Frozen pipes, outdoor faucets, sump pumps, spring checks
- Know when to call
Start here
How to Tell If Your Pipes Are Frozen: 5 Signs to CheckA faucet that barely trickles on a cold morning is the most common sign of a frozen pipe. Five checks to tell if a pipe is frozen, and what to do next. Never use a torch or open flame.
- How to Prevent Frozen Pipes: 7 Steps Before Winter (and What to Do If They Freeze)DIY · 15 steps
Maintain adequate heat, protect exposed piping, drain outdoor faucets and never use a torch or open flame. Steps to winterize your pipes, what a thermostat can't do, and what to do if a pipe freezes.
- How to Winterize an Outdoor Faucet in 4 StepsDIY · 7 steps
Disconnect the hose, close the indoor shut-off, drain the faucet and cover it. How to winterize an outdoor faucet, when a frost-free hose bib makes sense, and what to do if one froze or split.
- Spring Plumbing Maintenance Checklist: 8 Steps After WinterDIY · 8 steps
Check outdoor faucets for winter damage, test the sump pump before the spring rains, look over the water heater and check for small leaks. An 8-step spring plumbing checklist.
- Sump Pump Not Working? How to Test It and Get Ready for Heavy RainKnow when to call
From a dry, safe spot, pour a bucket of water into the pit and watch the pump start and stop. How to test a sump pump, why one stops working, and when power or discharge problems need a professional.
Stop and call if a pipe has burst, or water is rising in the basement. 908-873-6686
Leaks, pipes & water
Burst pipes, hidden leaks, gas leaks, the main shutoff, water treatment
- DIY · 5 steps
Start here
Brown or Rusty Water From the Faucet? 5 Steps to Find the CauseBrown tap water usually comes from rust or sediment stirred up in the water main, your water heater or old galvanized pipes. Five quick checks to find out which, and when it needs a plumber.
- Pipe Burst? What to Do Right Now in 6 StepsKnow when to call
Shut off the main water valve where safe, stay clear of wet electrics, call a plumber and document the damage. What to do when a pipe bursts, step by step.
- Gas Leak Signs: What to Do If You Smell Gas at HomeKnow when to call
Smell gas? Leave the building immediately and call 911 and the gas utility from a safe location. The signs of a gas leak, what to do first, and what happens after the site is declared safe.
- How to Check for a Water Leak in Your House (Meter Test and More)DIY · 5 steps
Use your water meter to find out if you have a leak, tell whether it's inside or outside the house, and check the usual spots: toilets, sinks, appliances, ceilings and walls.
- How to Shut Off the Water to Your House (Find the Main Valve)DIY · 5 steps
Where the main water shut-off valve usually is in a New Jersey house, how to turn off a gate valve or a ball valve, and what to do when it won't turn.
- Low Water Pressure in the House? 7 Steps to Find and Fix ItKnow when to call
Low water pressure is usually a clogged aerator or showerhead, a valve that isn't fully open, a failing pressure reducing valve, a leak or old pipes. Seven checks, in order, to find the cause.
- Slab Leak Signs: How to Check for a Leak Under Your FloorKnow when to call
Running water you can hear when nothing is on, a warm spot on the floor, a jump in the water bill. The signs of a slab leak, and how to check for one with your water meter in six steps.
- Is Hard Water Bad for Your Pipes? What It Does to Plumbing and How to Fix ItKnow the signs
Hard water leaves mineral scale in pipes, faucets, shower heads and water heaters. What it damages, how to tell if you have it, and when a water softener is worth it.
- How Long Do Pipes Last? Lifespans for Copper, PEX, PVC, Galvanized and Cast IronKnow the signs
Pipe life varies with the material, the water and the installation. Rough ranges for copper, PEX, PVC, galvanized steel, cast iron and clay, what shortens them, and how to tell when it's time for a closer look.
- 7 Signs Your House Needs Repiping (and When a Repair Is Enough)Know the signs
Leaks in new places every few months, brown water in the morning, pressure that keeps dropping, gray galvanized pipe in the basement: the signs it's time to repipe, and what the job involves.
- Types of Plumbing Pipes: Copper, PEX, PVC, Cast Iron and MoreKnow the signs
Copper, PEX, CPVC, PVC, cast iron, galvanized steel and polybutylene: what each pipe is generally used for, why suitability depends on the job, and how to tell what's in your house.
Stop and call if your water meter keeps moving with every fixture off, or you see water stains spreading. 908-873-6686
Before you hire a plumber
Codes, insurance, bids and what to ask
- DIY · 7 steps
Start here
How to Find an Honest Plumber in Central New Jersey: 7 StepsLook up the license, ask how they charge before anyone drives out, read reviews for specifics and ask what's not worth fixing. Seven steps to find an honest, reliable plumber.
- Does Homeowners Insurance Cover Plumbing? What's Usually Covered and What Isn'tKnow the signs
Homeowners insurance usually pays for sudden water damage, like a burst pipe, but not for wear, slow leaks or the repair of the pipe itself. What's usually covered, what needs extra coverage, and how to file.
- How to Choose a Plumber in New Jersey: 8 Things to Check Before You HireKnow the signs
How to choose a good plumber in New Jersey: check the master plumber license, insurance, reviews, how they price and what they guarantee. A checklist from a NJ Master Plumber.
- Low Plumbing Bid? How to Compare Plumber Quotes Before You HireKnow the signs
A plumbing quote far below the others usually leaves something out. How to compare plumber quotes line by line, the warning signs of a lowball bid, and the questions to ask before you hire.
- 7 Mistakes to Avoid When Hiring a PlumberKnow the signs
The most common mistakes homeowners make when hiring a plumber, from skipping the license check to agreeing to work without a price, and how to avoid each one.
- NJ Plumbing Code and Permits: What Homeowners Need to KnowKnow the signs
NJ adopted the 2024 National Standard Plumbing Code, NJ edition, effective August 17, 2026. What that means, why permit requirements depend on scope, who pulls the permit and what the inspector checks.
- Plumbing Repairs You Shouldn't DIY (and the Ones You Can)Know the signs
Gas lines, water heaters, main sewer clogs and burst pipes are jobs for a licensed plumber. Which plumbing repairs are safe to do yourself, which aren't, and why.
Home checklists
New homes, inspections, remodels and prevention
- DIY · 5 steps
Start here
How to Check a Plumber's License in New Jersey: 5 StepsAsk for the license number and the name on it, then look it up on the state's verification site. Five steps to check a New Jersey master plumber's license before you hire.
- Common Plumbing Problems and How to Fix Them: 10 Quick FixesDIY · 10 steps
A clogged drain, a running toilet, low water pressure or no hot water? Here's the first thing to try for the 10 most common household plumbing problems, and when to call a plumber.
- How to Prevent Plumbing Emergencies: 8 Steps Every Homeowner Should TakeDIY · 8 steps
Know how to shut off the water to your house, swap old washing machine hoses, add leak sensors and fix small leaks early. Eight steps that stop most plumbing emergencies before they start.
- New Homeowner Plumbing Checklist: 9 Things to Do in Your First WeekDIY · 9 steps
Find your main water shut-off, check the water heater's age, test the sump pump, look for hidden leaks and find the sewer cleanout. A 9-step plumbing checklist for your first week in a new home.
- Plumbing During a Remodel: What to Replace While the Walls Are OpenKnow the signs
A bathroom or kitchen remodel is the cheapest time to fix old plumbing. What to replace while the walls and floors are open, what moving fixtures involves, and when to bring in a plumber.
- Plumbing Inspection Before Buying a House: What It Checks and WhyKnow the signs
A standard home inspection only skims the plumbing. What a plumber's pre-purchase inspection checks, what it costs to skip one, and when to add a sewer camera.
What things cost
What changes the price, and how we quote: written upfront flat-rate pricing options
- How Much Does Drain Cleaning Cost?Cost guide
Drain cleaning prices depend on which drain is clogged, how it's cleared and whether the line needs a camera. Here's what changes the price and how we quote after assessing the job.
- How Much Does an Emergency Plumber Cost in NJ?Cost guide
Outside regular hours, our emergency fee is $250 upfront, and paying it waives the standard $49 service fee. Repairs are quoted before work begins. Here's how the bill is built and what changes the repair price.
- How Much Does Leak Detection Cost?Cost guide
Finding and fixing a leak depends on where it is and how hard it is to reach. Here's what changes the price and how we quote after assessing the job.
- How Much Does Sewer Line Repair Cost?Cost guide
Sewer line work ranges from clearing roots to replacing a section or the whole lateral. Here's what changes the price, when a camera may be recommended, and what we don't do. We don't do outside digging or excavation.
- How Much Does Sump Pump Replacement Cost?Cost guide
Sump pump prices depend on the pump, the pit, the check valve and discharge line, and whether you add a battery backup. Here's what changes the price and how we quote after assessing the job.
- How Much Does Water Heater Replacement Cost?Cost guide
The price of a new water heater depends on the type, size and fuel, and on what the installation needs. Here's what changes it, what we do and don't install, and how we quote after assessing the job.
Get plumbing tips and reminders
New how-to guides when we publish them, a heads-up before frozen-pipe nights, and a reminder to test your sump pump before spring rains. A few emails a year. Unsubscribe anytime.

Leaking pipe right now?
Shut off the water first if you can reach the valve safely, then call us, day or night.
908-873-6686Outside regular hours and on holidays, emergency service requires a $250 upfront emergency fee. When paid, the standard $49 service fee is waived. During regular hours there is no emergency fee. Additional repairs are quoted before work begins. We respond immediately upon contact; dispatch and arrival depend on availability and location.
Do this now
- Shut the main valve. Usually where the water line enters, near the meter.
- Stay clear of electricity. Don't enter standing water or touch electrical controls near the leak.
- Open a low faucet to drain the pipes and take pressure off the leak.
What neighbors say
Had backup and they came out in half hour on a Sunday and got the blockage resolved. They cleaned up after themselves. Very very professional people.
Honest, reliable and they do a great job. I highly recommend plumbing doctor services.
Mike is awesome, knowledgeable, thorough and friendly! Overall great and expedient experience!
Excellent service and very knowledgeable. I definitely recommend them.
Very knowledgeable, attention to detail, extremely neat and organized. We highly recommend Plumbing Doctor.
Mike works quickly and is transparent with pricing. He's trustworthy, reliable and brings his own shoe covers.
They tell me what is worth doing or not doing, and won't try to upcharge me. The work is always great. They are my go-to!
Found my outdoor cleanout that was covered up for years and no other company could find! … They use drop cloths and clean up when they are done.
