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Should I close main shut off valve when I go
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| konstantinknight9 | Date: Fr, 08/02/2024, 11:23 AM | Message # 1 |
 Plumber
Group: Administrators
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| Should I close main shut off valve when I go on a long vacation ?
Yes, it’s a good idea to close the main shut-off valve when you go on a long vacation. This helps prevent potential water leaks or bursts that could cause significant damage to your home. Closing the valve stops the flow of water into your home, reducing the risk of plumbing issues while you’re away. Additionally, consider draining the water from the water heater if you’re going to be away for an extended period, especially if you live in an area prone to freezing temperatures.
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| Mary A. | Date: Fr, 08/02/2024, 1:06 PM | Message # 2 |
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Group: Guests
| I wish I knew it before, last December our house was flooded when we were on vacation.
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| Mary A. | Date: Sa, 08/03/2024, 10:54 PM | Message # 3 |
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Group: Guests
| Where can I locate the main line shut off valve in my house ?
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| konstantinknight9 | Date: Sa, 08/03/2024, 10:58 PM | Message # 4 |
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Plumber
Group: Administrators
Status: Offline
| Mary,
The main shut-off valve for your plumbing system is typically located in one of these common areas:
1. Basement: Look near where the main water line enters your home, often on a wall close to the floor.
2. Crawl Space: If your home has a crawl space, the valve may be located there, near the point where the main water line enters the house.
3. Utility Room: In some homes, the main shut-off valve is located in a utility room where water heaters and other systems are housed.
4. Garage: If your garage is attached to the house, the valve might be on an interior wall where the main water line comes through.
5. Exterior Wall: In some cases, the valve is located on an exterior wall, often in a covered area or box. The valve is usually a round wheel or lever that you turn to open or close the water supply.
If you're having trouble finding it, consulting your home's plumbing blueprint or call our office for help.
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| Mary A. | Date: Tu, 07/28/2026, 5:50 AM | Message # 5 |
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Group: Guests
| Found it, thanks — it's in the basement near the water heater. Now that I know about closing it for vacations, is there anything I should be careful about when turning it back on when we get home? Or can I just open it back up normally?
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| plumber | Date: Tu, 07/28/2026, 5:51 AM | Message # 6 |
 Soldier
Group: Administrators
Status: Online
| Good question — turning it back on isn't complicated, but there are a few things worth doing carefully so you don't run into surprises, especially after your flooding experience.
Steps for turning the main valve back on:
Open the valve slowly, not all at once. Turning it fully open in one quick motion can cause a pressure surge (water hammer) that stresses pipes, fittings, and connections — especially in an older home. Turn it gradually over 15-20 seconds.
Check for leaks before leaving the house again. Once the water's back on, walk through and check under sinks, around the water heater, near the washing machine hoses, and any other visible connections. A slow leak that started while you were away, or one caused by the valve itself, is much easier to catch right away than weeks later.
Run a few faucets to clear air from the lines. After being shut off, there's often trapped air in the pipes. Run cold and hot water at a few faucets for a minute or two until it flows smoothly without sputtering.
If you drained the water heater before leaving, don't just turn the power/gas back on immediately. Make sure the tank has fully refilled with water first (you'll know because the faucets will be running steadily) before restoring power to the water heater. Turning on a gas or electric water heater with a partially empty tank can damage the heating element or burner.
Check your water pressure gauge if you have one. After being closed for a while, some valves (especially older gate valves) don't reopen to their full original flow capacity. If pressure seems noticeably lower than before you left, the valve itself might be wearing out and worth having inspected.
One extra tip given what happened to you last December: consider also having a plumber check the condition of that main valve itself next time they're out for something else. Older gate valves can seize up or develop leaks around the stem over years of infrequent use, and it's a cheap thing to have inspected compared to the cost of another flood.
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| Guest | Date: Mo, 08/10/2026, 3:49 AM | Message # 7 |
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Group: Guests
| Thank you, this is really thorough. One more thing — since our old gate valve might be worn out like you mentioned, would it be worth just replacing it with a ball valve while a plumber is already out? I've heard ball valves are more reliable. Is that a big job?
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| plumber | Date: Mo, 08/10/2026, 3:50 AM | Message # 8 |
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Soldier
Group: Administrators
Status: Online
| Great instinct, Mary — yes, I'd generally recommend it, especially given your history.
Why ball valves are worth the upgrade:
- Quarter-turn operation: A ball valve shuts off with a simple 90° turn of the handle, versus a gate valve that needs many full turns of a wheel. In an emergency (like a burst pipe), that speed matters.
- Longevity: Gate valves rely on a rising stem and wedge mechanism that can corrode, seize, or develop leaks around the packing over years of infrequent use — exactly the issue we discussed with your old valve. Ball valves have far fewer moving parts prone to failure and tend to hold a tight seal for decades.
- Clear on/off indication: The handle position tells you at a glance whether it's open or closed, which gate valve wheels don't.
On the job itself:
- It's a relatively straightforward repair for a licensed plumber — usually 1–2 hours of labor, since the water needs to be shut off at the street/meter, the old valve cut out, and the new one soldered or pressed in.
- Cost is modest compared to most plumbing repairs, and it's a very reasonable thing to bundle in the next time you already have someone out for an unrelated visit, as you suggested.
Given you're planning to have your main valve inspected anyway, this is a good time to just handle both at once rather than waiting for the old valve to fail on its own.
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| Guest | Date: Th, 08/13/2026, 3:23 AM | Message # 9 |
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Group: Guests
| Can a main shut-off valve leak after being reopened?
I recently turned my home's main water shut-off valve back on after being away for several weeks. The valve works, but I noticed a small amount of water around the stem after opening it.
Is this something that can happen with an older gate valve after it has been operated for the first time in a long time? Can the packing nut be tightened, or does a leaking valve usually need to be replaced?
How serious is a small leak around the main shut-off valve, and should I have it repaired immediately?
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| plumber | Date: Th, 08/13/2026, 3:24 AM | Message # 10 |
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Soldier
Group: Administrators
Status: Online
| Can a main shut-off valve leak after being reopened?
Yes, an older main shut-off valve can sometimes begin leaking around the stem after it has been operated, especially if it has not been used for many years.
A small amount of moisture around the valve stem can indicate that the packing seal is beginning to deteriorate. On some valves, carefully tightening the packing nut may stop a minor leak. However, it should not be overtightened because that can make the valve difficult to operate or damage the packing.
If the valve continues to leak, is difficult to turn, or does not completely shut off the water, replacement is usually a better long-term solution. This is particularly true for older gate valves that have been in service for many years.
A leaking main shut-off valve should not be ignored. Even a small leak can become worse, and the main valve is an important safety component in case of a burst pipe or other plumbing emergency.
If replacement is necessary, a properly sized quarter-turn ball valve is often a practical modern alternative to an aging gate valve, subject to the plumbing configuration and applicable local requirements.
Because the main valve controls the entire home's water supply, replacement is best handled by a licensed plumber, particularly if the home's water cannot be independently shut off upstream of the valve.
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| Guest | Date: Fr, 08/14/2026, 8:34 AM | Message # 11 |
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Group: Guests
| What should I check after turning the main water valve back on after a long vacation?
We recently returned from a long vacation and turned the main water supply back on. Everything seems to be working normally, but I'm wondering if there are any plumbing problems I should specifically look for after the water has been shut off for several weeks.
Should I check the water heater, toilets, faucets, washing machine hoses, and under-sink connections for leaks?
Is it also a good idea to check the water pressure after reopening the main valve?
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| plumber | Date: Fr, 08/14/2026, 8:35 AM | Message # 12 |
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Soldier
Group: Administrators
Status: Online
| What should I check after turning the main water valve back on after a long vacation?
After the main water supply has been shut off for an extended period, it's a good idea to inspect the plumbing system before returning to normal use.
Open the main valve slowly and listen for unusual noises. Air trapped in the pipes can cause some sputtering when faucets are first opened, so run several faucets briefly until the water flows normally.
Then check visible plumbing connections throughout the house. Look under sinks, around toilets, near the water heater, washing machine hoses, dishwasher connections and any exposed pipes. Pay particular attention to older flexible supply lines and valves.
The water heater deserves special attention. If the tank was drained while you were away, make sure it is completely full before restoring power to an electric heater or restarting the heating system.
If you have a pressure gauge, check the home's water pressure after reopening the valve. A significant change from the normal pressure could indicate a problem with the main shut-off valve, pressure-reducing valve, or another component.
It's also worth checking toilets and faucets for slow leaks. A toilet that begins running continuously after the water is restored may have a worn fill valve or flapper.
Finally, walk through the basement, utility room and other areas where plumbing is exposed and look for any signs of moisture.
A few minutes of inspection after returning home can help catch a small leak before it becomes a major water-damage problem. If the main valve is difficult to operate, leaks around the stem, or doesn't fully open or close, have it inspected by a licensed plumber.
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| Guest | Date: Su, 08/16/2026, 3:14 AM | Message # 13 |
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Group: Guests
| Should I test my main water shut-off valve regularly?
I recently learned that my main shut-off valve had been sitting unused for years, and it started leaking around the stem when I finally operated it.
How often should a homeowner test the main shut-off valve? Is it better to leave an older valve alone, or should it be operated periodically to make sure it still works?
What should I do if the valve becomes difficult to turn?
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| plumber | Date: Su, 08/16/2026, 3:14 AM | Message # 14 |
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Soldier
Group: Administrators
Status: Online
| Should I test my main water shut-off valve regularly?
Yes. It's a good idea to know where the main shut-off valve is and periodically verify that it still operates properly. A valve that has not been touched for many years can become stiff, corroded or difficult to close when you actually need it during a plumbing emergency.
You don't need to repeatedly cycle the valve. A simple periodic check is enough. Turn it slowly and make sure it can shut off the home's water supply, then reopen it and check the valve and surrounding connections for leaks.
If the valve is difficult to turn, starts leaking around the stem, or doesn't completely stop the water, don't force it. Excessive force can damage an old gate valve or the plumbing connection.
Older gate valves are particularly prone to becoming difficult to operate after years of inactivity. A properly sized quarter-turn ball valve is often a more convenient replacement because it requires only a 90-degree turn and provides an obvious visual indication of whether it's open or closed.
It's also worth checking the main valve after returning from a long vacation, especially if you closed it before leaving. Open it gradually, inspect for leaks and run a few faucets briefly to remove trapped air from the plumbing.
If the valve is the only point where the home's water can be shut off, I'd have an old or questionable valve inspected before an emergency occurs. Replacing a deteriorated main valve proactively is much easier than discovering during a burst-pipe emergency that the valve won't close.
The goal isn't to exercise the valve constantly—it's to make sure your home's most important plumbing safety valve actually works when you need it.
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| Guest | Date: Sa, 08/22/2026, 2:32 AM | Message # 15 |
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Group: Guests
| Should I turn off the water heater when I close the main water valve for vacation?
I usually shut off the main water supply when I leave the house for several weeks. I have a tank-style water heater, but I'm not sure whether I should also turn it off.
Is it necessary to shut down the water heater if the house will be empty? If I turn it off, should I also turn off the gas or electricity? And what should I do when I return?
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| plumber | Date: Sa, 08/22/2026, 2:33 AM | Message # 16 |
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Soldier
Group: Administrators
Status: Online
| Should I turn off the water heater when I close the main water valve for vacation?
If you're going to be away for several weeks, it's worth considering the water heater as part of your vacation shutdown procedure. However, the correct procedure depends on the type of heater and the manufacturer's instructions.
If the water heater will remain full and the home will not be exposed to freezing temperatures, simply closing the main water valve does not necessarily require draining the tank. For an extended absence, many homeowners choose to place the heater in an appropriate vacation or low-temperature mode, if the unit has one.
For a gas water heater, don't simply shut off the gas supply without following the manufacturer's shutdown procedure. For an electric water heater, the power can generally be switched off when appropriate, but the tank should remain completely full if the heating elements may be energized again later.
The most important rule when returning home is never restore power to an electric water heater until you are certain the tank is completely full. Opening a hot-water faucet until water flows steadily without sputtering is a useful indication that the tank has filled.
After reopening the main water supply:
Open the main valve slowly.
Check the water heater and its connections for leaks.
Run several faucets briefly to remove trapped air.
Confirm that the tank is full before restoring power to an electric heater.
Follow the manufacturer's procedure for restarting a gas heater.
Check the home's water pressure if you have a pressure gauge.
Since this thread has already discussed leaks appearing around older main shut-off valves after they are operated, it's also a good opportunity to inspect the valve itself when you return.
If freezing temperatures are possible, the situation is different: simply closing the main valve isn't enough to protect the plumbing. The home may require appropriate heating, winterization and, in some circumstances, draining of vulnerable plumbing.
For a normal vacation, the safest approach is to follow the water heater manufacturer's vacation/shutdown instructions rather than simply turning everything off.
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