Plumbing Vent Diagram: How to Properly Vent Your Pipes

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How to Properly Vent Your Pipes

If you?re ready to tackle the task of remodeling your kitchen or bathroom, you may be intimidated when you think about the plumbing. There is a lot you should know before you embark on making any major changes. But luckily, it?s easy to learn the basics. Our plumbing vent diagram and simple DIY instructions will have you ready to take on your remodel before you know it.

Let?s take a look at how to properly vent your pipes. Then you can start remodeling your kitchen or bathroom with confidence. Here?s what you need to know to complete your project.

So, you?re ready to remodel your kitchen or bathroom and realized that new plumbing is in order. If this isn?t an issue you?ve run into before, you might find it a little more difficult than most other DIY projects. Before panicking and calling a plumber, know that there are simple ways to ensure your pipes are properly ventilated.

A quick internet search for ?plumbing vent diagram? will bring up multiple ways to tackle this issue. But how do you know which one will work for your home? What are the pros and cons of each system? Whether it?s a new sink, tub, or toilet, here?s how to properly vent your pipes.

Visualizing the pipes inside your wall (using a plumbing vent diagram) is made easier if you start from where you can see. You?ve opened up the cabinets under a sink before to see the P-shaped tube directly underneath the drain, right? It?s called the P-trap, and it starts the sewage/ventilation process.

Related Read: Everything You Need to Know About Plumbing Traps

The true vent

The true vent
A re-vent pipe
The common vent
And the loop vent

These drain pipes connect to showers, sinks, tubs, and other appliances in order to carry water away after you?re done using it. From there, the water moves into slightly larger drain pipes as they continue to connect and make their way to the stack. Soil pipes do the same for toilets.

The stack pipe leads the whole way out through your roof and further underground in the opposite direction to the main sewer lines. Water and waste head down the pipe, while gasses are vented up and outwards. The stack also allows fresh air in to keep water running smoothly through your piping.

Without the stack to properly ventilate things, your home would reek and fill with noxious sewer gasses. To help the stack do its job, ventilation pipes are often added to fixtures. This allows gasses to freely move away from your home while using fresh air to move sewage freely.

There are four main types of ventilation used in piping. They are:

The true vent is aligned vertically and attaches to your drain line through the roof. This is best implemented if a fixture rests close to the stack and the top floor of your home, allowing the stack to serve as a vent. True vents also have no water running through them. While the true vent is simple, it isn?t always a possible solution since fixtures are rarely located so close to the stack.

Understanding the Plumbing Vent

Re-vent pipes, otherwise known as auxiliary vents, attach to the drain line near your fixture. They run upwards and over the main vent. They can attach right behind your fixture or horizontally to the drain line. These are excellent options when your sink is too far away from the main stack.

In the event that you have another fixture on the opposite side of the wall, you probably want to use a common vent. This allows both drain lines to tie together in a sanitary cross. You can usually find these on back-to-back sinks.

Types of Vents

The loop vent is a solution for many freestanding sink codes. It loops up and around before connecting to the drainpipe. This allows ample ventilation to take place just behind your fixture. There is also a wet vent. However, these are mostly reserved for tubs that sit close to a stack and may not be allowed by your locality?s code.

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