10 Common Plumbing Problems in South Shore MA Homes (And How to Fix Them)

Old Homes, Real Problems

Plumbing problems don't announce themselves. A faucet that drips once a second wastes thousands of gallons a year. A slow drain that gets ignored turns into a full backup. And across the South Shore — where a lot of the housing stock is 50 to 80 years old — the underlying pipes, fixtures, and fittings often have more miles on them than people realize.

Here are the ten most common plumbing issues we see in Quincy, Braintree, Weymouth, Milton, Hingham, and Abington homes — and what's actually going on when they happen.

1. Dripping Faucets

A faucet that drips when it's off isn't just annoying — at one drip per second, it wastes roughly 3,000 gallons of water a year. That shows up on your water bill whether you notice the drip or not.

What causes it: Usually a worn washer or O-ring inside the valve seat. In older compression faucets — common in homes built before the 1980s — those rubber parts harden and crack over time. Ball faucets and cartridge faucets have their own internal seals that wear out.

Fix: Replacing the washer or cartridge is a straightforward repair. If the valve seat itself is pitted or corroded, the faucet may need replacing. Either way, don't let it drip for months.

2. Slow-Draining Sink

A bathroom sink that drains slowly almost always has a partial blockage building up in the P-trap or in the first few feet of drain line. In kitchens, it's usually grease and food solids. In bathrooms, it's hair and soap scum.

Fix: A drain snake or a hand auger clears most of these. Cleaning the P-trap manually takes five minutes with a bucket and channel-lock pliers. If it's recurring, the line may need a proper cleaning rather than just clearing the trap.

3. Clogged Shower or Tub Drain

Hair is the main culprit in shower and tub drains, and it tends to bind together with soap into a solid mass that water eventually can't get past. This builds up slowly — usually over months — until one day the tub won't drain at all.

Fix: A drain hair removal tool (a long, barbed plastic strip) pulls most clogs out manually. A drain snake handles deeper ones. A mesh drain cover going forward prevents the problem from repeating.

4. Clogged Toilet

A toilet that won't flush — or that drains slowly and gurgles — usually has a blockage somewhere between the bowl and the main drain. The cause is almost always either too much paper at once or something that shouldn't have been flushed: wipes, hygiene products, paper towels.

Fix: A quality flange plunger clears most toilet clogs. A toilet auger handles tougher ones. If multiple toilets or drains are backing up at once, the blockage is in the main sewer line — that's a different and more urgent problem.

Important: "Flushable wipes" are not actually flushable. They don't break down in sewer systems. Don't flush them.

5. Running Toilet

A toilet that runs constantly — that trickling sound that doesn't stop after the tank fills — wastes up to 200 gallons of water per day.

What causes it: Almost always a worn flapper valve that isn't sealing the tank properly. Sometimes it's a float that's set too high, causing water to spill into the overflow tube constantly.

Fix: Replace the flapper (a $5–10 part available at any hardware store). Most homeowners can do this repair themselves in under 30 minutes.

6. Water Heater Problems

Water heaters fail in predictable ways — usually after 10–15 years for tank units, and often not all at once.

• Lukewarm water: Failed heating element (electric) or burner issue (gas)
• Popping or rumbling sounds: Sediment buildup from hard water minerals accumulating on the tank floor
• Rust-colored water: The anode rod has worn out and the tank is corroding internally
• Water pooling around the base: The tank is leaking — at that point, replacement is usually the answer

Fix: Annual flushing extends water heater life. When a unit is past 12–15 years and having problems, replacement is usually the better investment.

7. Low Water Pressure

Low pressure in one faucet is usually a clogged aerator — unscrew it and rinse out mineral deposits. Low pressure throughout the house is a different problem entirely.

What causes house-wide low pressure:

• Galvanized supply lines corroding from the inside out, reducing pipe diameter. This is extremely common in South Shore homes built before 1970.
• A partially closed main shutoff valve
• A pressure-reducing valve (PRV) that's worn out or set too low
• A leak somewhere in the supply line

If your older Quincy or Braintree home has galvanized supply pipes and the pressure has been slowly declining over years, the pipes themselves are the problem. The fix is repiping — a project, but a permanent upgrade that improves both pressure and water quality.

8. Garbage Disposal Problems

Disposals jam most often because of what goes into them. Fibrous foods like celery, starchy foods like potato peels, and anything hard like fruit pits will jam or damage the grinding plates.

Fix a jam: Turn off the unit, use an Allen wrench in the hex socket on the bottom to manually rotate the grind plate until it frees up, then press the reset button (small red button on the bottom).

If the motor hums but doesn't spin and the plate isn't jammed, or if the unit leaks from the body, it typically needs replacing.

9. Leaking Pipes

Pipe leaks tend to show up at joints — couplings, elbows, and connections where two sections of pipe meet. Galvanized pipe corrodes from the inside and eventually leaks from pinhole corrosion or at threaded fittings.

Winter is when leaks get discovered on the South Shore. Pipes in uninsulated spaces — crawl spaces, exterior walls, garages — are vulnerable to freezing. After any extended cold snap below 15°F, it's worth checking under sinks and in the basement for any new moisture.

10. Sewer Line Backup

If one drain is slow, it's probably a localized clog. If multiple drains are slow or backing up simultaneously — especially if you're seeing sewage coming up in a basement floor drain — you've got a main sewer line blockage. This needs immediate attention.

Common causes on the South Shore:

• Tree root intrusion — the mature oaks and maples throughout Quincy, Milton, and Abington are the primary cause of sewer line problems in this area
• Grease accumulation in homes that use the kitchen sink for cooking waste
• Pipe collapse in older clay tile laterals
• Offset joints from ground settling

What to do: Stop using water in the house and call a plumber. A camera inspection tells you what you're dealing with before any work starts.

If you're dealing with any of these issues, Johnson Bros. Plumbing & Drain Cleaning serves the entire South Shore — Quincy, Braintree, Weymouth, Milton, Hingham, Abington, and surrounding towns. Call us at (617) 479-9911. We'll give you a straight answer about what's going on and what it takes to fix it.