Common Plumbing Problems and When to Call a Pro

That distinction determines urgency. A dripping supply joint is a genuine emergency in a way a slow drain is not.

Know where the shutoff is before you need it

The most valuable plumbing knowledge in any household is the location of the main shutoff valve and how to operate it. Typically it is where the supply enters the building — a basement wall, a utility closet, a crawlspace, or an exterior box near the street.

Test it now rather than during a flood. Valves seize when unused for years, and discovering that mid-emergency is expensive. Individual fixtures usually have local shutoffs too, under sinks and behind toilets.

Jobs worth attempting yourself

A running toilet is usually a worn flapper, a $10 part fitted in fifteen minutes, and it can waste enormous volumes of water. Replacing a showerhead or a tap aerator is straightforward. Clearing a hair clog in a bathroom drain with a plastic zip tool works far better than chemicals.

Chemical drain cleaners deserve a specific warning: they generate heat, damage older pipes and gaskets, and if they fail they leave a caustic standing pool for whoever opens the trap next. Mechanical clearing is better in almost every case.

Replacing a P-trap under a sink is manageable, as is fitting a new supply line to a toilet, provided you shut the water off and have a towel ready.

Jobs that need a licensed plumber

Anything involving the main sewer line, gas lines, water heaters, or work inside walls. Anything requiring a permit, which in most jurisdictions includes moving fixtures, altering supply routing and replacing a water heater.

Water heaters specifically: they combine water, electricity or gas, and pressure. A misinstalled temperature and pressure relief valve is a genuine explosion risk, and improper venting on a gas unit is a carbon monoxide risk. This is not a cost-saving DIY candidate.

Also call a professional for repeated backups across multiple fixtures, which usually indicates a main line problem — often tree roots — rather than a local clog.

What things cost

Plumber rates commonly run $75 to $200 per hour with a call-out minimum, and emergency or after-hours rates are considerably higher. Typical jobs: unclogging a drain $150 to $400, replacing a toilet $250 to $600 installed, water heater replacement $1,200 to $3,500 depending on type, main line hydro-jetting $400 to $900.

Sewer line replacement is the expensive one, frequently $4,000 to $15,000, since it usually involves excavation. Trenchless methods cost more per foot but avoid destroying a driveway or mature landscaping, so compare total restored cost rather than the pipe work alone.

Prevention that actually pays

Replace rubber washing machine hoses with braided stainless steel. Burst washer hoses are among the most common household water damage claims, and the upgrade costs about $20.

Install an automatic water leak detection and shutoff device on the main. These have become affordable, and several insurers offer premium discounts for them. In a house that sits empty during holidays, the payback is easy to justify.

Insulate exposed pipes in unheated spaces before winter, and during hard freezes let a tap drip slightly on exterior walls. Never pour grease down a drain. Know that flushable wipes are not, in any practical sense, flushable.

Water pressure and hidden leaks

Excessive pressure damages fixtures and shortens appliance life. Above roughly 80 psi, a pressure-reducing valve is worth fitting; a gauge that screws onto a hose bib costs a few dollars and tells you where you stand.