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Many older homes in Toronto feature cast iron drain stacks as part of their plumbing system. These pipes extend from the basement’s main drain, rise vertically through the home, and terminate above the roof. While durable in their time, cast iron pipes have become prone to several issues as they age. Common problems include:
• Hairline cracks leading to wastewater leaks.
• Sewage odors caused by deteriorating pipe integrity.
• Slow drainage due to internal corrosion, which reduces pipe diameter.
For modern plumbing systems, ABS (black plastic) pipes are a preferred alternative to cast iron. However, replacing cast iron stacks requires specialized tools, skills, and expertise. At Toronto Sewer and Drain Services, our team of licensed plumbers provides professional replacement services for leaky or broken cast iron stacks in the standard sizes of 3” and 4”.
Our comprehensive service includes upgrading both above-ground and underground portions of the pipe, as the cast iron section often extends approximately five feet below ground to connect with clay pipes. During the process, we ensure that all work complies with plumbing codes and correct any existing issues or code violations for optimal drainage.
Understanding Drain Stack Requirements
A drain stack is a vertical pipe that serves two primary functions:
1. The soil stack, which carries wastewater from fixtures like sinks, showers, and toilets.
2. The vent stack, which allows air circulation and prevents sewer gases from entering your home.
By plumbing code, every house must have at least one vertical drain stack, with a minimum diameter of 3” extending to the roof. Additionally, a sewer cleanout (a removable access lid) must be installed within 1 meter of the basement floor for easy inspection and cleaning.
Replacement Considerations:
• From 4” to 3” Pipes: Older 4” cast iron stacks can often be replaced with 3” ABS pipes if the entire stack is upgraded, as 3” pipes can handle up to six toilets.
• Reusing Vent Stacks: To avoid roof repairs or flashing replacements, the existing 4” cast iron vent stack above the roofline can remain in place, with a secure connection made to the new ABS pipe using mechanical joint couplings.
Because strict plumbing codes govern these installations, hiring a professional plumber is crucial to ensure compliance and proper functionality.
Our Cast Iron Drain Stack Replacement Process
Step 1: Initial Assessment
Our service begins with a thorough inspection to locate the cast iron pipe and assess its condition. If the pipe originates underground, we prioritize replacing the underground section up to its connection with the clay pipe before addressing above-ground portions.
Step 2: Accessing the Pipe
The cast iron stack is typically concealed behind walls. Our skilled plumbers strategically determine the best locations to cut into the drywall, minimizing disruption to your home.
Step 3: Safe Removal of Old Pipes
Using professional-grade tools like snap cutters and diamond saws, we carefully cut the heavy cast iron pipe into manageable pieces for safe removal.
Step 4: Installing the New ABS Pipe
We replace the old stack with durable ABS piping, reconnecting all branch drains from plumbing fixtures using Y-fittings and pipe elbows. Connections are secured with high-quality ABS glue, allowing immediate use of water after the job is complete.
Step 5: Final Touches
After completing the replacement, homeowners will need to hire a drywall professional to repair any openings made during the process.
Why Choose Us for Cast Iron Drain Stack Replacement in Toronto?
For over 20 years, we have been the trusted choice for thousands of homeowners in Toronto needing cast iron stack replacements. Our team is known for its:
• Expertise: Certified plumbers with advanced tools and techniques.
• Compliance: Strict adherence to plumbing codes for safety and functionality.
• Customer Satisfaction: A professional approach and top-quality results.
Whether you need a partial replacement or a complete upgrade from the underground connection to the roofline, we are here to help.
Don’t delay – call us today at 416-834-6893 or submit an online request. Let us take care of your plumbing and drain needs efficiently and professionally!