How much does it cost to replace a water shut-off valve?
Updated
Short answer
Exercising the water shut-off valves costs nothing and takes 10 to 15 minutes. The cost arrives when a valve won't turn: a plumber charges $150 to $400 to replace a stuck main shut-off, because the water has to be stopped at the street first. The small valves under sinks and behind toilets are cheaper to replace and within reach of a handy owner, but the main valve is the one that matters and the one a plumber should do.
Cost breakdown
| Item | DIY | Pro |
|---|---|---|
| Materials | none | included |
| Tools you may need to buy | none | included |
| Labor | your time | $150 to $400 |
| Total | $0 | $150 to $400 |
The exercise itself costs nothing, and a wrench and a flashlight are the only tools. The pro price is for replacing a main valve that's seized, which includes shutting the water at the meter or the street and the new valve.
What drives the cost
- Which valve. The main shut-off is the expensive one, because of the street shutoff and because it's often an old gate valve in a tight spot. A sink or toilet valve is a small job.
- Valve type. A quarter-turn ball valve costs a little more than a gate valve and is the one to ask for, since it's far less likely to seize again.
- Access. A main valve in a crawl space or behind a finished wall takes longer to reach and replace.
- The street shutoff. If the valve at the meter is also stuck, or the utility has to come out to shut the water, the job takes longer and may wait on their schedule.
- Emergency or planned. A valve replaced on a weekday you chose costs the standard rate. One replaced during a flood, after it snapped off, costs the emergency rate on top of the water damage.
DIY vs. pro
The exercising is yours, and it's the whole reason the valve keeps working: how often to exercise the water shut-off valves is every 6 to 12 months, and a valve that moves twice a year rarely seizes. The small valves under sinks are a moderate DIY replacement for someone comfortable with compression fittings.
The main valve is the plumber's. Replacing it means stopping the water at the street, and a valve that breaks during a DIY attempt leaves the house with no way to shut off the water and a plumber coming at an emergency rate. The $150 to $400 for a planned replacement with a ball valve is money that buys a valve you can trust at midnight.
FAQ
How much does it cost to replace a main water shut-off valve?
$150 to $400 from a plumber, including stopping the water at the street and fitting the new valve.
Can I replace a water shut-off valve myself?
A sink or toilet valve, yes, if you're comfortable with compression fittings. The main valve needs the water stopped at the street and is a plumber's job.
Is it worth replacing a gate valve with a ball valve?
Yes. A ball valve turns a quarter turn and rarely seizes. If the main valve is a gate valve that's getting stiff, replace it before it fails.
What if the shut-off valve won't turn?
Don't force it. Work it gently with a wrench, and if it won't move, have it replaced while the house still has water and the calendar is yours to choose.