Why Choose Morrison Plumbing & Mechanical
We specialize in professional rough-in plumbing that meets code, passes inspections and keeps your project on schedule. Whether you’re a builder, general contractor, developer or homeowner planning a high-level project, we provide clear scope, meticulous execution, and reliable coordination with trades.
Trusted by builders, GCs and homeowners throughout Toronto & the GTA:
- Fully licensed and insured mechanical contractor
- WSIB certified
- Inspection-ready installations
- Projects completed on schedule
- Clean and organized job sites
Our Rough-In Plumbing Services
We handle all aspects of rough-in plumbing for new construction and renovation projects, including:
- Under-slab and basement drain rough-ins
- Waste and vent stack installation
- Waterline distribution installation (PEX, copper or other)
- Fixture set points (bathroom, kitchen, laundry, bar sinks)
- Hose bibs and exterior water outlets
- Backwater valve and sump pump rough-in piping (Rebates available!)
- Pressure and drainage testing
- Documentation and support for inspections
Our rough-ins are executed with precision, full code compliance and disciplined scheduling.
With deep experience in Toronto housing, we design drain and waterline layouts that preserve ceiling height and eliminate unnecessary bulkheads — helping your finished space feel intentional, clean and professionally built.
Contact Us
Who We Work With
Our clients include:
- Builders & General Contractors
Seeking reliable mechanical partners who deliver quality installations and inspection support - Custom Home Owners & Renovators
Looking for a professional rough-in that supports design intent and future finishing - Legal Basement Suite Projects
Wanting code-compliant plumbing rough-ins that pass inspection and integrate with final finishes - Multi-Residential Developments
Requiring structured coordination with trades, plumbing rough-in expertise and documentation support
How Our Process Works
Clear communication and structured execution set us apart:
- Consultation & Plans Review
We discuss scope, review plans, and confirm details before mobilizing. - Site Walk & Measurements
On-site verification of conditions and clear job expectations. - Detailed Quote & Scope
You get a written scope and quote with no surprises. - Testing & Inspection Support
Pressure and drain tests completed and documented for inspector approval.
Builder Testimonial:
“Morrison Plumbing delivered an inspection-ready rough-in exactly as specified, kept us on schedule, and communicated clearly throughout the project.”
– Steve, Toronto
Homeowner Testimonial:
“The rough-in was done professionally with great coordination — inspectior knew Joshua on first name basis. Thanks again, Joshua”
– Sarah, Toronto
Frequently Asked Questions
When does the plumbing portion of the project start?
We are typically both the first and last trades onsite.
We begin with any required underground work. This often includes selective demolition of the basement slab, installation of new drain and vent lines, and proper re-pouring of concrete once testing is complete.
After underground plumbing is finished, we temporarily demobilize while framing is completed. During this phase, we coordinate layout with the framing and HVAC teams early to prevent conflicts and reduce the need for unnecessary bulkheads or lowered ceilings.
Once HVAC rough-in is complete, we return to install drain, vent, and waterline systems, set tubs where required, and prepare the system for testing.
After passing inspection and pressure testing through the City of Toronto portal, we demobilize again and return at the finishing stage to complete trim installations, fixture hook-ups, and final testing.
What is rough-in plumbing?
Rough-in plumbing is the foundational installation of drain, waste, vent, and water supply systems before insulation and drywall. It must be installed to code, properly sloped, pressure tested, and ready for inspection prior to final finishes.
A properly planned rough-in directly impacts ceiling height, fixture placement, and long-term system performance.
Do you handle basement suite rough-ins?
Yes. We specialize in basement rough-ins for legal secondary suites, full basement renovations, and additions. Our installations are designed to pass inspection and integrate cleanly with finished layouts while preserving usable ceiling height wherever possible.
Do you provide documentation and inspection support?
Yes. All rough-ins are pressure tested and installed to Ontario Building Code requirements. We coordinate inspections through the City of Toronto portal and ensure systems are fully compliant prior to moving into finishing stages.
Will you coordinate with other trades?
Absolutely. Early coordination is critical to a clean rough-in.
We review layout with other contractors at the start of the project to align fixture locations, framing considerations, beam runs and HVAC routing. This proactive communication helps eliminate conflicts, reduce bulkheads and maintain ceiling heights in the finished space.
How long does a rough-in plumbing installation take?
Timeline depends on project size, how many fixtures and complexity. Most basement rough-ins can be completed within 1-3 days including underground and testing, while full custom home rough-ins vary based on square footage and scope. We provide a clear timeline during quoting and align with the overall construction schedule.
Ready to get started?
Explore More Services
Drain Cleaning
Clogged drains are a nuisance – unwanted materials taking up residence in your pipes. These issues are a gradual build-up, meaning these pesky drainage become durable and grow into tough blocks.
Sewer Repair
Have a sewer back up? Need a sewer line repair? Our team of experts can help you fix any issue your home is experiencing.
Waterproofing
In a finished basement, this can damage the foundation of your home, ruin the flooring and walls, damage furniture, and leave lingering problems like mold growth.
