How To Vent A Basement Sink | 3 Easy Steps

Vents are an essential part of your plumbing system and without them, your plumbing can mess up easily. Vents are there to deal with the positive pressure pressures or the negative pressure that is called vacuum. You have to have vents so your plumbing can breathe. You don’t want your toilets, sinks, or tubs to bubbling or gurgling or making a whole lot of noise. That’s why we will describe to you How to Vent a Basement Sink following simple and easy steps. 

Types Of Venting Systems Into The Basement

Plumbers usually use two different ways of vents in residential construction. A good old-fashioned passive vent through the roof which most plumbers prefer. Because going through the roof you’re handling that positive pressure that comes along; it can blow out the top of that lid.

Then once that column of water makes its little turn, it starts heading in the other direction. It can suck air back in. so this way it’s handling both the positive pressure and the negative pressure. 

The other option you have is called an air admittance tile. It’s also called steward vent. It has a little flapper inside it and it only handles the negative pressure there. This is designed to go inside a cabin; you can’t put it on a wall. This has to be serviceable.

It controls the sewer odors and will not let the air come out. Here the positive pressure will shut and when you vacuum; it’s going to pull that out open and let air in. it’s mostly used in kitchens and island sinks

How To Vent A Basement Sink

If you don’t have a vent that can go from the top of your pipe up through the attic and out to the top of your house it’s better to add a mechanical vent with the pipes under your sink. You can do the same thing in your basement sink. Here we will show you how to install a mechanical vent or steward vent under your basement sink. To get started with your vent installation follow the steps down below-

How To Vent A Basement Sink

Step 1 

First, disconnect your faucet from the pipes and get all the plumbing below out of the way. The mechanical vent here will allow air to come in from the top of the vent when the water will go by. The air will be able to break the vacuum but it will never let sewer gas go out from the top of the vent. 

Step 2

This vent has threads underneath and comes with an adapter that you can screw with the main pipe of your sink. Here you have to select your vent which meets the plumbing code of your area. Before installing the vent you have to make sure that you at least have a minimum of 4 inches of clearance rising from where the p-trap comes in.  

Step 3 

Wrap some Teflon tape on the threads of your vent to make sure it’s watertight sealed. When you’re wrapping the tape make sure you go in the opposite direction of the threading. Put the vent in the adapter and tighten it up with the pipe. As it’s made of plastic do not put too much pressure on the joint to make it tight; it might break the vent joint. 

Now you have the proper vent that meets code and you don’t have to worry about putting a hole through your wall and trying to get this up through your house and up to the attic or rip open the wall and find the old cast-iron pipe that’s in the wall which you really wouldn’t want to do.

How The Venting System Works

To understand this whole venting process go to your basement sink and look at the plumbing happening there. Fill your sink to the top and pop that little drain in the middle. Here the water comes down the pipe underneath and when it’s moving through the pipe it creates a column of water that will move forward on the front side of that column of the water. Here it will create a positive pressure on the back end of that column a negative pressure will be created. And that’s called vacuum. That’s why you have to vent it; to take care of those pressure issues. 

Final Verdict

This is the easiest solution to install a vent on your basement sink or any sink you like. And you can do it on your own. So this is the whole procedure of How to Vent a Basement Sink. We hope this solved your problem.

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Frequently Asked Questions (FAQ)

How To Vent A Kitchen Sink Under A Window

Assuming you have a window above your kitchen sink, and you want to vent the sink without moving the window, here are some options:

  1. Use a vent fan: If you have a vent fan installed in your kitchen, you can open the window and turn on the fan to vent the sink.
  2. Use a window fan: If you don’t have a vent fan, you can use a window fan to vent the sink. Place the fan in the window so that it’s blowing out, and open the window a few inches.
  3. Use a portable fan: If you don’t have a vent fan or a window fan, you can use a portable fan to vent the sink. Place the fan in the window so that it’s blowing out, and open the window a few inches.
  4. Use a hairdryer: If you don’t have a vent fan, a window fan, or a portable fan, you can use a hairdryer to vent the sink. Turn the hairdryer on to the lowest setting and hold it up to the window, opening the window a few inches.

Do I Need To Vent A Basement Sink?

If you have a basement sink, you may be wondering if you need to vent it. The answer is yes, you should vent your basement sink to avoid any problems with your plumbing. Venting a basement sink allows air to flow into the drain and prevents clogs from forming. It also prevents sewage gases from entering your home through the sink.

Does A Sink Drain Need A Vent?

A sink drain typically doesn’t need a vent, because the trap under the sink already has a water seal that prevents sewer gases from coming up through the drain. However, if you have a double sink with two drains, then you’ll need to install a vent to prevent the drains from siphoning water out of the trap and causing a sewer gas smell.

Can You Vent A Sink Inside?

If you have a sink that is draining slowly or is full of water, you may need to vent it. Venting a sink means allowing air to enter the drain line so that water can flow freely. There are a few ways that you can vent a sink, and the best method will depend on the location of the sink and the type of sink.

If the sink is located in an area where there is little or no ventilation, you may need to use a plunger to force air into the drain line. Placing the plunger over the drain and pushing and pulling the plunger up and down will create a suction that will help to vent the sink.

If the sink is located in an area with good ventilation, you can open the window or door nearest to the sink to help ventilate the area. You may also want to turn on a fan to help circulate the air.

If the sink is clogged, you may need to use a plunger or a plumbers’ snake to clear the clog before you can vent the sink. Once the clog is cleared, you can use one of the methods mentioned above to vent the sink.

I'm Jimmy, the creative mind behind Drawing from extensive expertise in home improvement, I founded this platform to help individuals transform their living spaces. My dedication lies in empowering homeowners with dependable advice, ensuring that every DIY project not only elevates your home but also enhances your lifestyle. Join me as we redefine homes, one project at a time.

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