In a plumbing emergency, the amount of damage is decided almost entirely by how many minutes pass before the water stops. Not by how good the plumber is. Twenty minutes on a dry afternoon — finding your valves, testing them, and labeling them — is worth more than anything else in this whole guide section.
If you’re on town water — Laconia, Franklin, Tilton, Northfield, or the villages of Meredith, Wolfeboro, Ashland, Bristol, or Plymouth — your main shut-off is where the service line comes through the foundation, usually near the water meter. It’s typically a gate valve (a round handle you turn many times) or a ball valve (a lever that moves a quarter turn).
There’s usually a second one too: the curb stop, out at the street under a small metal cap. That one belongs to the town and needs a special key; it’s their valve, not yours, but it’s worth knowing it exists.
If you’re on a well &mdash which is most of this region — there are two things that stop water, and you need both:
Closing the valve alone leaves a pump that may keep cycling against a closed system. Killing the breaker alone leaves a pressure tank full of water that will keep feeding a break until it empties. Do both.
Every fixture should have its own shut-off so you can isolate a problem without shutting down the house. Go find each of these:
Plenty of older Lakes Region houses are missing some of these entirely — a bathroom with no way to isolate it is common in a house that’s been added to over a century. Adding stops where they’re missing is inexpensive and it’s one of the highest-value small jobs you can do.
Two kinds of valve, two failure modes.
Multi-turn stops — the little football-shaped chrome valves with a ridged oval handle, standard under sinks and toilets for decades — use a rubber washer on a threaded stem. Sitting untouched for fifteen years, the washer hardens and the stem corrodes in place. When you finally turn it, one of three things happens: nothing, it snaps off, or it closes partway and starts weeping around the packing nut. All three of those occur in the middle of the emergency you were trying to stop.
Gate valves — the round-handled ones common as house mains in older buildings — have a brass gate that drops into the flow. They corrode and seize open, and sometimes the stem turns freely while the gate stays exactly where it was. That last one is the worst, because you think you’ve shut the water off.
Ball valves — the lever type, quarter turn — are what modern plumbing uses and they’re dramatically more reliable. If your critical valves are old multi-turn stops or gate valves, replacing them is cheap insurance.
Pick a day when you’re home, awake, and not in a hurry — and when a plumber could get to you if something goes wrong. Then close each valve fully and reopen it. That’s the whole exercise.
Do it gently. If a valve won’t move with reasonable hand pressure, stop. Do not put a wrench on an old stop and lean on it — a snapped valve on a live line converts a maintenance task into a flood. A valve that won’t move is a valve to have replaced, on a Tuesday, at normal rates.
If a valve weeps slightly around the stem after you’ve turned it, a gentle eighth-turn on the packing nut usually stops it. If it doesn’t, that valve is due.
Tag the main shut-off. Label the well pump breaker in the panel — ideally label the whole panel while you’re there, because in a wet basement you want to kill a circuit at the panel rather than reaching for a plug while standing in water. Write on the tag which way closes it.
Then tell everyone in the household where it is. The person who’s home when a pipe lets go is frequently not the person who read this page.
For a seasonal house, put the same information in writing and leave a copy at the property — it’s the first thing a caretaker, a neighbor, or a plumber you’ve never met will need.
On town water, follow the pipe from the water meter back toward the wall — the valve is almost always within a few feet of where the line enters, often low and behind something. On a well, find the pressure tank (a tall blue or grey tank, usually in the basement) and follow the pipe leaving it. If you genuinely can’t find one, that’s worth a service call before you need it and not after.
It’s not an emergency today and it will be one eventually. A valve that closes partway is a valve you can’t rely on, and you’ll discover that at the worst moment. Replacing a fixture stop is a small job; replacing a seized house main is bigger but still a scheduled one. Do it while it’s a choice.
For anything longer than a weekend in winter, yes — and drain a low faucet afterward. It’s free, it takes a minute, and it means the worst case while you’re gone is whatever water was already in the pipes rather than an unlimited supply. Many homeowner policies effectively expect it for a vacant home.
Yes, the cold supply valve on top of the unit. Knowing it is what lets you stop a leaking water heater without shutting down the whole house. Also know how to kill its power or fuel: breaker for electric, gas valve for gas or propane, burner switch for oil.
Adding shut-offs and replacing seized ones is small, cheap work that prevents big, expensive work. Tell us what you found.
If your valves are seized or you don’t have one where you need it, that’s a small job now and a flooded floor later.
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