Plumbing Maintenance: What to Do, How Often, and What It Costs

Plumbing problems are expensive for one reason: water keeps moving. A dripping fitting under a sink can run for months before anyone notices, and by then the bill is for the cabinet, the subfloor, and the mold, not the fitting. Most of the plumbing maintenance worth doing is about catching small leaks early and knowing how to stop water fast when something fails.

This guide covers the plumbing jobs that actually matter, how often to do them, what each costs to do yourself versus hiring a plumber, and what each one prevents. It also links to answers for the problems people search for most, like a leaking water heater, a toilet that keeps running, and low water pressure.

If water is actively leaking right now, skip ahead to what to do in a plumbing emergency.

What to do in a plumbing emergency

When water is coming from somewhere it should not, the order matters. Stop the water first, then figure out the cause.

1. Close the nearest shutoff. Toilets and sinks usually have a small valve on the supply line underneath. If you have a tank water heater, there is usually a valve on the cold line at the top.
2. If that does not work, close the main. The main shutoff is usually where the water line enters the house: in a basement, crawl space, garage, utility closet, or near the water heater. In some homes it is outside near the meter.
3. Cut power to anything wet. If water is near outlets, an electric water heater, or appliances, turn off those breakers before you stand in it.
4. Open a faucet on the lowest floor to drain pressure out of the lines, which slows any leak that is still dripping.
5. Take photos before you clean up, if there is damage you might need for an insurance claim.

The water heater

If you have a tank water heater, it is the plumbing fixture most likely to cause serious water damage when it fails, because it holds a lot of water and usually sits in a closet, basement, or garage where a slow leak goes unnoticed. A yearly flush, a pressure check, and an occasional look at the anode rod are the maintenance that matters. Tank water heaters often last somewhere around 8 to 12 years. Knowing yours is near the end lets you replace it on your schedule instead of after a flood.

• Water around the base? Start with why your water heater is leaking.
• Wondering whether to repair or replace? See how long a water heater lasts.

Toilets, faucets, and the small leaks that add up

A running toilet or dripping faucet will not flood the house, but they are the leaks people tolerate longest, and the water bill keeps running the whole time. Both are usually cheap parts and a short DIY job. A flapper or fill valve is a few dollars to about $25. A faucet cartridge is often $10-$40.

• Why your toilet keeps running, including the dye test for leaks you cannot hear.
• How to fix a dripping faucet, and when replacing the faucet makes more sense.

Drains and clogs

One slow drain is almost always a local clog of hair, soap, or grease close to the fixture, and a plunger or a $5 plastic drain snake often fixes it. Several slow drains at once, gurgling, or water backing up in a tub or floor drain point to a clog farther down the line, which is a job for a plumber with a cable machine or camera.

Go easy on chemical drain cleaners. They can damage some older pipes, they rarely clear a serious clog, and they make the job more hazardous for whoever has to open the line next.

• Why your drain is slow and how to clear it.
• Why your garbage disposal hums but does not spin, if you have one.
• Why your washing machine is not draining, and how to tell a drain clog from a machine problem.

Water pressure and noisy pipes

Pressure problems go both ways. Low pressure is annoying and sometimes points to a failing valve or a hidden leak. High pressure is quiet and does more damage: it wears out supply lines, toilet valves, and water heaters faster. A $10-$15 gauge on an outdoor faucet tells you where you stand. A reading above about 80 psi is a common threshold for calling a plumber.

• Why your water pressure is low.
• Why your pipes bang or knock, which is often a pressure problem in disguise.

Basements, crawl spaces, and sump pumps

If your home has a basement or crawl space, groundwater is part of your plumbing picture whether you think of it that way or not. If you have a sump pump, test it in spring and fall by pouring a bucket of water into the pit. If you do not have one and get water after heavy rain, it may be worth asking whether you need one. See sump pump basics.

Freezing weather

If you get hard freezes, frozen pipes are the most expensive plumbing failure on this page. Drain outdoor faucets in fall, insulate pipes in unheated spaces, and know what to do the night before a cold snap. See how to winterize outdoor faucets and how to prepare for a hard freeze.

When to do it yourself and when to call a plumber

• Do it yourself. Flappers and fill valves, faucet cartridges and aerators, plunging and hand-snaking a single drain, replacing washing machine hoses, flushing a water heater, and testing a sump pump.

• Probably hire it. Replacing a shutoff valve that will not seal, anode rods on a tank that has never been opened, clogs that come back after you clear them, and anything where you would need to cut or solder pipe.

• Always hire it. Gas lines and gas water heaters, main sewer line clogs, replacing a water heater, pressure reducing valves, and any leak inside a wall or ceiling.

Plumbers often charge a service call fee just to show up, commonly somewhere around $75-$200, and emergency or after-hours rates run higher. That is one more reason to handle small leaks during business hours, before they become emergencies.