Basement Bathroom Rough-In across Vaughan

If you have a roughed-in floor

Look for capped pipes sticking up from the concrete, usually two or three in a group near the stack: a three-inch toilet drain and one or two smaller drains for a shower and sink. Builders in Vellore, Maple and Thornhill Woods often installed these. Sometimes the vent was roughed in as well, and sometimes it was not. We check each stub with water and a camera to make sure it actually connects and was not filled with concrete during the pour.

If you are starting from bare concrete

We locate the building drain, which runs under the slab toward the front wall. A concrete saw cuts a trench from the new fixtures to that drain. The fill is dug out, new ABS drains are laid at the correct slope, joined to the main with a proper wye, and the trench is backfilled and re-poured.

• Every fixture needs a vent, either tied into an existing vent stack or a new one through the roof.
• Where the building drain sits above the new toilet, a sewage ejector pit is needed instead.
• A backwater valve is well worth adding while the floor is open.

Permits and inspection

New drains and venting need a plumbing permit in Vaughan, with inspection of the under-slab work before the trench is closed. Inspection is your proof the work was done properly, and it matters when you sell. Our permits note covers the basics; confirm the details with the City's building department.

Supply lines

Hot and cold come from the basement mains, typically in PEX, with shutoffs for each fixture. If the water heater is far from the new bathroom, expect a short wait for hot water at the shower. Insulating the hot line helps.