Finding Your Main Water Shut Off Valve
It’s funny that the two most important things in your house are hidden as they’re not pretty, so you really don’t want to have to look at them. Or you don’t want to look at them until you need them the main water shutoff valve and your electrical panel.
When you move into a new house, there are so many things to learn that it’s easy to forget a few of them. That’s why I wrote 30 New Homeowner Tips You Don’t Want to Skip. Number 17 reads Find your main water shutoff and learn how to turn your water off . So if you don’t already know where your main water shut off valve is, here are the places to check. And you’re right that it would be nice if there was an industry standard, but there isn’t one.
Trust me, finding out where your main water shutoff valve is location isn’t something you want to put off.
Where Is The Water Heater Valve Located
A shut off valve is required, by plumbing code, to be installed on the cold water supply pipe to the water heater . Since this valve supplies water to the water heater, by shutting it off you will also be shutting off the water to all of the hot water pipes throughout the rest of the home.
This valve will also either be a ball valve or a gate valve. Typical practice in our area is for this valve to connect to a flexible supply pipe that attaches to the inlet pipe on top of the water heater.
Because the typical water heater has an average life-expectancy of about 10-12 years in our area, many people opt to install some sort of automatic shut off valve as well. This valve has a sensor which detects water if there is a leak and automatically turns the water off.
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A Beginners Guide To Installing A Shutoff Valve
When you have a leaking faucet, the last thing you want is to waste water letting it drip loudly into a pan until you get around to fixing it, or calling in a plumber. Even worse is a broken washing machine that can flood your home. From a practical sense, its simple logic to conclude that you wont be able to do repairs on pipes with water still flowing through them. So what can you do to stop the flow so repairs can be made? If you have shutoff valves installed in your home, then you already know the answer.
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Remove Old Sweat Valve
Family Handyman
Hold the valve with a pliers, loosen the packing nut and unscrew the entire valve stem. Peek inside and remove the old washer if its stuck on the seat. Removing the valve stem allows any remaining water to drain out, making the unsweating process easier. Before you do any torch work, make sure theres a fire extinguisher nearby and safeguard the wall with a flame protection cloth. Then remove the old valve and the remaining solder.
To begin, drape the flame protection cloth over the copper tubing and tape it to the wall. Adjust the torch to a small fame and aim it toward the body of the valve. As soon as the solder melts, twist and pull the valve off the copper tubing with a pliers.
Adding Sink Shutoff Valves

How to keep them level. Making this simple change will yield a lifetime of convenience and ensure a quick response.
It shouldn’t be necessary to turn off the water to the entire house just to fix a leaky faucet, but that’s exactly what many homeowners must do. Why? Because they don’t have individual shutoff valves installed under every sink.
If you’re facing the same situation, consider putting a valve on every hot- and cold-water supply tube. The valves will not only allow you to shut off the water to one sink without disrupting the flow to others but they’ll also provide a quick way to turn off the water in the event of a flood caused by, for instance, a cracked fitting or ruptured supply tube.
The good news is that adding compression shutoff valves to an existing sink is a simple, straightforward job that most homeowners can handle. In most cases you won’t even need to replace the supply tubes that run from the valves to the faucet. However, if the tubes are corroded or kinked, replace them with braided stainless-steel supply lines . Standard compression valves cost about $7 each.
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Two Conditions Two Valves
There are two styles of compression valve commonly used in sink hookups. When the water pipe enters the sink cabinet through the back wall, a right-angle-stop valve is required to make the 90-degree turn to the faucet. When it enters through the floor, no turn is needed so a straight-stop valve is used.
You must also consider the type of pipe that supplies water to the sink. If it’s made of 1/2-in. rigid copper, you’ll need a compression fitting to connect the valve. If the piping is threaded galvanized iron, use a valve that has female iron-pipe threads.
Here, we’ll show two different installations: adding an angle-stop valve to galvanized iron pipe and putting a straight-stop valve onto copper pipe. Note that angle- and straight-stop valves are available for both copper and iron piping.
Angle-Stop Valve
Your first step is to shut off the water to the entire house at the meter. Drain the system by opening the sink and tub faucets on the lowest floor. Some water might remain in the system, so keep a small bucket handy.
Next, use a wrench to loosen the water-supply tube from the adapter. Break the 3/8-in. compression nut free with the wrench, then twist it off with your fingers . To disconnect the other end of the supply tube from the faucet, use a basin wrench . The long handle of this wrench allows you to reach up behind the sink bowl and grab onto the faucet’s coupling nut.
Where Are The Kitchen Faucet Valves
Under kitchen sinks, there will typically be three shut off valves. The two uppermost valves will be the hot and cold valves for the sink faucet. The lower valve is for the dishwasher.
Conventionally, these valves would connect to the faucet in the same way as bathroom valves/faucets with replaceable supply lines. Many newer kitchen faucets now come with integrated supply lines that connect directly to the outlet of the valves.
In larger, newer homes, you may find an additional valve designed to feed an under-sink water filter or instant hot water tap.
The common rough-in dimensions are very similar to bathroom faucets with the hot valve ideally being on the left side of the drain pipe when facing the wall and the cold valve being on the right side. Of course, there is usually much more space under the kitchen sink, so you will often see these valves in various places.
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There Are A Variety Of Water Shut
These valves top the most commonly used list, and are nearly always located in the open right under the toilet tank. Look for the oval-shaped valve knob.
Sink valves are typically located just under the sink, toward the rear and near the bottom of the cabinet.
Washer shut-off valves are typically just behind or above the washer, with one each for hot and cold supply lines.
- Dishwasher/Refrigerator
Refrigerators with water dispensers and icemakers as well as dishwashers SHOULD also have a water shut-off valve, but some may not. For dishwashers, look for a second valve on the hot water supply line that has a horizontal pipe leading away from it. For refrigerators, its usually located at the wall at the back of the refrigerator sometimes hidden in a panel. Valves MIA? Check the attic/basement ceiling directly above/below the appliance.
Where Do I Find My Main Water Shutoff
Around the house, the main shutoff valve is usually located on the outside towards the street. You can trace the water lines back to the main valve or the mechanical area if there is a basement in your home. If the home does not have a basement, an access panel can hide the shutoff valve.
Also, outside your home, there may be a primary shutoff valve. Located on the curbside of the street usually next to the water meter. Some main shutoff valves may need specialized tools to turn on or off.
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When To Call A Professional
In rare instances, you may find that your dishwasher has been hard-wired into an electrical circuit it is not plugged into an outlet at all. In this case, the disconnection involves turning off the circuit breaker controlling power to the dishwasher, then disconnecting the circuit wires inside the dishwashers wire connection panel, located behind the access panel at the lower front of the appliance. Unless you have experience with electrical work and are confident in your skills, this may be best left to a professional.
- Is it hard to uninstall a dishwasher?
Uninstalling and removing an old dishwasher is a doable task for DIYers with some knowledge of how the appliance is hooked up. Its best to complete this task with at least one other person.
- Do you need to turn the water off to remove a dishwasher?
There should be a valve that shuts off water to the dishwasher, so you dont have to completely shut off the buildings water. However, if the valve is damaged or nonexistent , then youll need to turn off the main water supply.
- What do you do with the space after removing a dishwasher?
If youre not looking to install a new dishwasher after you remove an old one, there are several ways to make use of that space. You can add cabinetry that matches the rest of the kitchen or create custom shelving, for example. It also can be a good spot for a trash can or rolling storage containers.
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Valves As In More Than One
There are several water shut-off valves around your home, allowing you to cut off water flow at the source before problems become titanic. Waiting until you need to break out flotation devices to find them is a bad idea. It is extremely important for you and everyone in your home to know where your homes water shut-off valves are and how to use them BEFORE disaster occurs.
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Disconnect The Drain Line
The dishwasher is also tied into the plumbing system via a drain line. Locate the rubber hose coming from the dishwasher and trace it to the end connection. It may run upward to connect to an air gap fitting mounted to the sink or countertop. If so, loosen the clip or clamp holding the hose to the air gap, and detach the hose.
If the drain hose does not run to an air gap, it will terminate at a nipple fitting on the food disposer or sink drain tailpiece. If so, detach the hose at this point.
How To Uninstall A Dishwasher In 5 Simple Steps

Aaron Stickley is a licensed plumber with 15 years of experience in commercial, new residential plumbing, and residential service and repair. He started his own residential service and repair plumbing business. Aarons articles about plumbing on The Spruce span four years.
The Spruce / Ana Cadena
- Working Time: 30 mins 1 hr
- Total Time: 30 mins
- Skill Level: Intermediate
Although it can seem intimidating, installing a new dishwasher is well within the reach of most DIYers. But first, you must remove the old dishwasher, a task that involves disconnecting water and power connections, as well as dealing with the hardware bracketing that holds the dishwasher in place. Enlisting the aid of a helper will make this work easier, especially as you extract the appliance from the opening beneath the countertop.
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Prepare For Valve Replacement
Shut off the water at the main shutoff valve. If you have a gas water heater, turn the knob to the pilot position. Shut off the circuit breakers to an electric water heater. Then open a faucet on the lowest level of your house and another faucet on an upper level to drain the pipes. Then disconnect the supply tube from the shutoff valve. Replace the valve.
Where To Install Water Shutoff Valves In Your Home
Every house has a main water shutoff valve. Sadly that can’t be said for each and every place in your home where you use water which can leak for some reason. Building codes keep improving but they focus first on safety like preventing fires which is why we now have smoke alarms. As a homeowner you might think a flooded basement is just as big a catastrophe but home repairs don’t have the same emotional impact as a ride in an ambulance.
If this bothers you, here are all the places in your house where you could add water shutoff valves for peace of mind. As some people prefer to see the details, I’ve tried to include a link to an article or video for each of these water shut off valves.
Under your kitchen sink, you should find a shutoff valve for the supply lines. Here’s a video on How to Install a Water Shut Off Valve.
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Grohe Switch Electronic Shut
Grohe Switch Electronic Shut-Off Valve for Dishwasher
consists of:
Control Element
- retrofittable safety for kitchen fittings, special kitchen fittings with utility shut-off valve are no longer necessary
- control element can be positioned flexibly within a radius of 10 metres around the sink
- activates by pressing
- colour signal when battery change is pending
- with integrated safety timer, valve switches off automatically after 4 hours
- battery-operated
- batteries included, battery life: approx. 2-4 years
- protection class: IP45
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How To Replace Your Dishwashers Water Inlet Valve
This article was co-authored by Gevorg Grigorian. Gevorg Grigorian is an Appliance Repair Specialist and the Owner of G and R Appliance Repair in Los Angeles, California. With over 12 years of experience, Gevorg specializes in residential and commercial appliance repairs as well as heating, ventilation, and air conditioning services. Gevorg holds a BS in Business Administration and Management from California State University-Northridge. This article has been viewed 42,578 times.
The water inlet valve feeds the water from your homes water line into the dishwasher. When this valve is defective, water can leak out of your dishwasher. If it doesnt let enough water in, your dishes may not be cleaned correctly! Fixing the dishwashers inlet valve is an easy project for the DIYer.
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What Are The Most Common Reasons For Shut Off Valve Failure
Stuck Valves
Shutoff valves may become stuck from age, non-use , or sediment. This condition can cause water leakage with the valve being stuck open. First, spray a lubricant such as WD40, loosen the stem nut, and turn again by hand. If successful, retighten the stem nut to prevent any water leakage. If this does not work, it may be time to replace the valve.
Leaky Faucett
We have all heard the drip, drip of a leaking valve at some time. But, it can grow into a much larger problem if left unchecked. Leaks need tightening or replacing the packing nut, then trying to turn it off/on again. If water leaking persists, it may be time to contact a plumber. But make sure and shut the water feed off first.
Partially Closed
When you try to close the valve and only close part way, try the WD40 procedure in treating a stuck valve. Loosen the valve with an adjustable wrench then close and open it to get it working. Make sure to retighten and check for proper functioning.
The Definitive Guide To Your Water Shut
Burst pipes and water leaks from appliances and fixtures can rapidly result in thousands of dollars in water damage to your home and a sky high water bill. Quick action is key, before repair needs turn your home into a money pit. How can you prevent water damage headaches? It all starts with a little 4-1-1 on the water shut-off valves throughout your home.
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Different Types Of Sink Shut Off Valves
Do you ever think about sink shutoff valves? Yeah, I didnt either until I walked into a flooded bathroom, and stood in the water, then had only one thought. Where is the sink shutoff valve as water gushed from the sink faucet?
I discovered there are many types of sink shutoff valves. I recognized the importance of sink shutoff valves when a major leak developed. And also where to look to shut them off.
This article covers various sink shutoff valves to help you to know how to turn the water line off if a leak happens.