The 10 Most Common Plumbing Problems in Twin Cities Homes

Leaks, clogs, fixture problems, and winter pipe damage call for different checks. Water chemistry can be relevant, but a citywide hardness estimate does not diagnose every plumbing problem.

1. Hard water scale on faucets, showerheads, and dishwasher

White deposits and soap-lather problems can be reasons to measure hardness. Results depend on the actual supply and existing treatment.

Next step: Measure hardness and consider softening if the result and household goals justify it. See our water softener installation page.

2. Running toilet

Toilets that run intermittently or constantly. Usually a worn flapper or fill valve. A toilet that runs 24/7 wastes thousands of gallons of water per year.

Fix: Replace flapper and fill valve. $50 in parts, 20 minutes of work. Worth doing yourself or having done at the same time as another service call.

3. Slow or clogged drains

See our clogged drain guide for a full breakdown. Grease, hair, mineral deposits or a pipe defect can require different responses. A hardness reading alone cannot diagnose the obstruction.

Fix: Mechanical clearing (cable auger or hand snake). Avoid chemical drain cleaners.

4. Water heater approaching end of life

Water-heater condition depends on the equipment, installation, use and maintenance. Hard water can form mineral deposits, but a local hardness estimate cannot predict failure. Follow the manufacturer’s maintenance instructions and assess the actual symptoms before choosing repair or replacement. Common signs: rusty hot water, longer recovery time, popping or rumbling from the tank.

Next step: Have the symptoms assessed and follow the exact manufacturer’s maintenance guidance. Compare repair and replacement options based on the actual equipment condition.

5. Frozen or burst pipes (winter)

A Twin Cities winter staple. Pipes in unheated garages, crawl spaces, exterior walls, and outdoor hose bibs are vulnerable.

Fix: Preventive insulation in fall, frost-free hose bib installation, knowing where your main shut-off is.

6. Leaking pipe joints

Older copper joints fail at solder points. Galvanized steel rusts from the inside. PEX is generally durable but fittings can fail.

Fix: Spot repair if isolated, repiping if widespread. Aging galvanized lines in homes built before 1960 should be planned for replacement.

7. Low water pressure throughout the home

Could be municipal supply issue, mineral buildup narrowing pipes, partially closed main shut-off, failed pressure reducing valve, or for well users, pump failure.

Fix: Diagnose first. We test pressure at the main and downstream of any softener or filter.

8. Sump pump failure

Twin Cities homes with basements often rely on a sump pump. Common failures: motor burns out, float gets stuck, primary pump fails during a power outage when you need it most.

Fix: Test annually before spring rains. Consider a battery backup pump. Replace pumps over 10 years old before failure.

9. Failing garbage disposal

A jammed or leaking disposal needs its own assessment. Do not assume a water softener will prevent mechanical faults or drain clogs.

Fix: Replace if over 10 years old or visibly leaking. Repair is rarely cost-effective on these.

10. Sewer line back-up from tree roots

In older Twin Cities neighborhoods with mature trees, tree roots find cracks in clay or cast-iron sewer lines. Spring backups are common.

Fix: Hydro jetting to clear roots, in-line camera to diagnose extent, sometimes line replacement.

The pattern

Match maintenance to the equipment and observed condition. Consider these steps:

1. Evaluate water treatment if measured hardness or a specific result gives you a reason
2. An annual plumbing maintenance check
3. Pipes insulated in unheated spaces before winter
4. Knowledge of where the main water shut-off is

Call 651-738-0580 for plumbing service or a free basic water test. The basic test does not measure PFAS or establish drinking-water safety.

See plumbing services →

Water-treatment reference: MDH, home water softening.