Plumbing hookup for kitchen sink

If you really want to go through this effort rather than just capping off the lines , then you should just install the lines into the walls if they aren't already.

How To Install a New Kitchen Sink , Faucet and Drain

Normally you'd just cap the lines off until you're ready to hook everything up as seen in my picture above , but there's nothing stopping you from putting valves on instead of caps, which is a great idea anyway it makes it easier to hook up, service later, etc. With the pipes in the walls, you can freely work on the floor and install cabinets without worrying about them and as you can see in this photo, it was before I had flooring or cabinets in.

Nothing stops you from using valves instead of caps, though it does require cutting a bigger hole in the cabinet to install. Depending on your cabinet style you may or may not like this -- in my case these are pretty cheap cabinets installed in a laundry room in the basement, I wasn't too worried.

Just be sure you don't accidentally knock the vales open while you're working, or you'll ruin the floor that you're not even finished installing yet! It is not advisable to have an inaccessible trap for a kitchen sink. That probably violates code for the clean-out somehow. Yes, it will work, however there will also be an air gap where you shoved the drain into the standpipe leading to bad smell if the trap has goo in it.


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It's OK for washing machines because there's no food waste and a good dose of soap every time. There should be shutoff valves under the sink. Usually those can be turned off verify that once they are no water comes out of the faucet and the pipes up to the faucet can be disconnected.

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The same is true with the waste lines. They normally have screw fittings that can be removed and reassembled. Installing a new sink is a fast and easy kitchen facelift. One thing to consider when choosing a new sink and faucet is how many holes the faucet requires.

Is it a single-handle unit or does it have separate handles for hot and cold water? Do you need holes for a separate sprayer or soap dispenser? Most drop-in sinks are available with various numbers of faucet holes.

How to Install a Kitchen Sink Drain (with Pictures) - wikiHow

If you end up with different setups, such as a one-hole faucet and a three-hole sink, you can make it work by using the plate, called an escutcheon, that typically comes with the faucet to cover unused holes in the sink. Measure the width of the base cabinet in which your sink will be installed. A sink should be four inches narrower than the cabinet to allow room for a mounting that doesn't require modifications of the cabinetry.

Also know that when it comes to the quality of sink materials, you get what you pay for. An inexpensive stainless-steel sink flexes when you push on it, scratches easily, and is difficult to keep clean. A higher-quality, heavier-gauge 6- or 8-gauge stainless-steel sink, such as one with a burnished finish, is a better choice.

Installing Kitchen Sink Drain Pipes

If you opt for a stainless-steel sink, make sure the underside is well coated with sound-deadening insulation. Enameled cast-iron sinks come in a variety of colors; they last much longer than enameled steel sinks.


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Acrylic sinks have the look of enameled cast iron, and the higher-end models are nearly as durable. Both cast-iron and acrylic sinks have insulating properties, so water stays warm longer than it does in a stainless-steel sink. To complete this project you will need the following tools and materials: Keep a jigsaw close by in case you need to enlarge the opening in the countertop.

The copper lines that supply hot and cold water to the sink often have shutoff valves under the sink. In some homes, you may need to turn off water elsewhere, such as at the lines in the basement that lead to the sink. Once the water supply is off, turn the faucet on to let water and pressure drain from the lines. If you have a garbage disposal, turn off the breaker panel switch that provides electricity to the kitchen and unplug the disposal's power cord.

Use a crescent wrench or a basin wrench if the nuts are difficult to reach to disconnect the faucet from the supply lines. Then disconnect the sink from the drainpipes using water pump pliers. As a landscape builder, he helped establish two gardening companies. Skip to main content. Tip The fasteners for the sink may already be installed on the underside of your countertop.

If so, you only need to connect them to the sink and tighten them.

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Warning If you are attaching the sink to a granite countertop, be sure the surface to which you are gluing the bolt posts is dust-free. Even a small amount of dust can interfere with adhesion of the glue. References 2 Ask the Builder: Undermount Kitchen Sinks Home Tips: How to Install an Undermount Sink. About the Author Chris Deziel has a bachelor's degree in physics and a master's degree in humanities.