ABS vs PVC Drain Pipes: Which One Should You Choose?

If you’ve ever stared at two types of plastic pipe at the hardware store—one black and one white—and had no idea which to grab, you’re not alone. This is a common situation for Canadian homeowners tackling drain work. Should you choose the black ABS pipe that’s been in your basement since you bought the home, or the white PVC drain pipe recommended by the store?

Both materials are plastic and are commonly used for drain, waste, and vent (DWV) systems. However, they have important differences that can affect installation, durability, and code compliance. Choosing the right one can save you time, money, and future repairs.

Here’s what you need to know.

What Is an ABS Pipe?

ABS stands for Acrylonitrile Butadiene Styrene. It is a tough, black thermoplastic known for its excellent impact resistance. ABS plumbing fittings and pipes are commonly found in Canadian homes built before the 1990s, particularly throughout Ontario and the GTA.

ABS is widely used for residential drain, waste, and vent (DWV) systems. Most ABS drain pipes are installed behind walls or beneath basement floors, where they quietly carry wastewater away from the home.

What makes it different:

• Always black, making it easy to identify.
• Bonds using a single-step solvent cement without requiring primer.
• Performs well in cold temperatures, making it suitable for Ontario winters.
• More impact-resistant than PVC if the pipe is struck.
• Provides slightly better sound dampening in multi-storey homes.

One drawback is that ABS does not perform well under prolonged UV exposure. Direct sunlight can gradually weaken the material, making it unsuitable for exposed outdoor installations.

Common ABS applications include:

• Residential drainage systems.
• Vent piping.
• Underground drainage lines.
• Basement plumbing systems.
• Wastewater removal systems.

ABS plumbing systems use specialized ABS pipe fittings that create strong, dependable, and leak-resistant connections.

What Is PVC Drain Pipe?

The white or light grey pipe that you’re familiar with from any plumbing supply store is PVC drain pipe  polyvinyl chloride. It has been in use for decades in North American plumbing, and it’s no wonder that it is chemically resistant, durable, and is only slightly more expensive than ABS.

PVC sewer pipe is suitable for above-ground interior pipe and for underground pipe. It has a higher resistance to UV exposure as compared to ABS and is therefore more suitable for use outdoors where UV is a factor. 

What makes it stand out:

• White or grey colour (clear visual difference from ABS)
• Requires primer plus solvent cement for a proper bond (two-step process)
• More flexible than ABS, which helps in tight spaces with complex angles
• Better for outdoor/above-ground exposed runs where sun hits the pipe
• PVC sewer pipe is commonly used for underground drainage to the municipal connection

The trade-off is installation. The two-step gluing process  purple primer first, then cement  adds time and more room for error if you’re DIYing. Miss the primer step and that joint will eventually fail.

Common PVC applications include:

• Residential drain pipes
• Commercial drainage systems
• Sewer lines
• Wastewater management systems
• Underground drainage networks

ABS Piping vs PVC: Head-to-Head Comparison

Which One Does Ontario’s Building Code Allow?

This is where many of the DIY-ers go wrong. ABS and PVC are permitted in drain, waste and vent systems within buildings by the plumbing code in Ontario (CAN/CSA-B181.1 and CAN/CSA-B181.2). In fact, both are legal.

However, the terms ‘legally allowed’ and ‘what your local inspector expects to see’ do not necessarily mean the same thing.

Most plumbers in the GTA (including Mississauga, Hamilton, Brampton) do interior above ground DWV jobs with ABS. That’s what is traditionally used here for many years and most home inspection centres have a larger selection of abs pipe fittings and abs plumbing fittings for it.

The bottom line: when beginning a plumbing job, particularly in an older residence, make sure to know what is currently present in the walls. If your current system is ABS, stay with ABS. When it comes to PVC, use PVC. A combination of both is not possible without a rubber transition coupling with stainless steel clamps. It is not possible to glue them together.

Can You Connect ABS And PVC Together?

Yes, but the proper fit is necessary. The only approved method is by a rubber transition coupling with stainless steel clamps. Do not attempt to join together directly, as the two plastics are incompatible in terms of their chemical makeup, and the resulting joint will fail.

This is most frequently encountered in renovations. A new bathroom in a completed basement, existing drain line is ABS and new fittings are PVC. Use a transition coupling. Problem solved.

Is ABS Or PVC Better For Canadian Winters?

This is a question which homeowners in the GTA (or areas as far away as Oakville, Hamilton, Milton, Cambridge, Niagara) with basements or crawl spaces that actually get cold should ask themselves.

ABS pipe is more resistant to temperature changes. Remains more flexible in cold conditions, important in unheated utility areas. If temperatures fall too low, PVC can become brittle, making it more prone to cracking under pressure.

ABS is the safer choice for unheated spaces such as garages and cold crawl spaces, or outdoor-adjacent utility rooms.

What About The Abs Sink Drain Specifically?

The ABS sink drain is standard in most of the Canadian residences. Everything from your bathroom or kitchen sink to your P-trap, tail pipe and a drain arm is almost always made of black ABS. If replacing any component of this assembly, match the material. All ABS pipe and fittings are system compatible and bond together.

If white PVC, use PVC when replacing a kitchen drain pipe if the existing tailpiece is white PVC. Apply ABS if it is black.

When Should You Call A Plumber Instead Of DIYing?

Swapping out a P-trap or a short section of drain pipe? Manageable for most homeowners with a bit of research.

But certain drain pipes situations need a licensed plumber:

• You’re adding new drain lines to an existing stack
• There’s a suspected crack or collapse in the main drain
• Your basement floor drain backs up regularly
• You need to connect to the municipal sewer line
• The existing pipe is cast iron or clay (common in GTA homes built before 1960) and you’re transitioning to plastic drainage pipe

These are situations where a wrong cut or missed slope creates backups, water damage, or a failed inspection. Getting it right the first time costs less than fixing it twice.

Does It Matter For A Home Plumber Vs A Licensed Pro?

If you are a home plumber and are making a small repair, such as replacing a leaking drain arm, or replacing a cracked P-trap (either of the materials will work, as long as you have a material that is the same as what you’ll be replacing it with.)

A licensed plumber is required for services related to the main, floor drains, or services that require a permit in Ontario. This is not an option. In most municipalities throughout the GTA, it’s the law.

People Also Ask

1. Is Abs Or PVC Better For Drain Pipes In Canada?

For most interior residential drain work in Canada especially in Ontario ABS is the more common and widely stocked option. It installs faster, handles cold temperatures better, and is the standard in homes across the GTA. PVC is a solid choice for outdoor runs and sewer connections where UV exposure is a concern.

2. Can I Mix Abs And PVC Drain Pipes?

You can, but only with a rubber transition coupling and stainless steel clamps. Never cement the two materials directly together; the bond won’t hold.

3. What’s The Lifespan Of Abs Vs PVC Pipe?

Both are long-lasting materials. Installed correctly, either type can last 50 to 100 years. The bigger factor is installation quality, not the material itself.

4. Do I Need A Permit To Replace Drain Pipes In Ontario?

For like-for-like repairs same pipe, same location usually no. For any new drain runs, changes to the drainage system, or work involving the main stack or sewer connection, a permit is typically required. Check with your local municipality.

5. How Do I Know If My Drain Is Abs Or PVC?

Simple: colour. Black pipe is ABS. White or grey pipe is PVC. You can also check the stamp on the pipe the manufacturer and material type are printed on the outside.

Working With A Drain Pipe Problem? Bos Plumbing And Drains Can Help.

Some plumbing jobs are worth figuring out yourself. Others, a backed-up main drain at 10 PM on a Sunday, a cracked sewer line, a basement flooding with raw sewage are not the moments to watch YouTube tutorials.

BOS Plumbing and Drains has been handling exactly these situations across the GTA for over 20 years. Based in Mississauga, they serve homeowners and businesses across the whole GTA including Mississauga, Oakville, Hamilton, Milton, Niagara, Cambridge, Brampton, and Etobicoke.

Their team handles everything from drain cleaning and hydro jetting to emergency plumbing, sewer line replacements, leak detection, sump pump installation, and full residential and commercial plumbing. Whether you’re a homeowner dealing with a slow drain or a business owner facing a plumbing emergency that can’t wait, BOS is available 24 hours a day including after-hours plumbing calls when most other companies go quiet.

For plumbing emergencies, same-day service, or just an honest answer about what’s going on with your drains, BOS Plumbing and Drains is the local emergency plumber GTA homeowners have trusted for two decades. They back major work with a 25-year transferable warranty and charge with no hidden fees which is exactly what you want when water is going somewhere it shouldn’t.