Under the Ontario Condominium Act, the unit owner is responsible for plumbing within the unit boundary (typically from the shut-off valve into the unit), while the corporation maintains common element pipes including stacks, main lines, and shared services. The exact boundary is defined in the condo corporation's registered declaration.

The corporation typically owns all common element piping: vertical drain stacks, main supply risers, roof drains, storm drainage, and the building's connection to municipal services. The exact boundary depends on the registered declaration and description for each specific corporation.

If a common-element pipe failure causes damage to a unit, the corporation's insurance generally covers repair of common elements and the unit to the standard unit description. Unit owners' insurance covers personal property and above-standard betterments. Raise the issue with the condo board promptly and document all damage.

Only if those pipes are within the common elements as defined by the declaration. Pipes within the unit boundary — inside your walls from the stack connection to your fixtures — are typically the owner's responsibility to maintain and replace.

Yes. In Ontario condominiums, the corporation is responsible for maintaining the common element drain stacks. Camera inspection and hydrojetting of vertical stacks is a corporation responsibility. Owners are responsible for their branch drains — the horizontal runs from their fixtures to the stack.

A single slow drain is likely a localized blockage in the branch drain — your responsibility. If multiple units on the same stack are slow simultaneously, report it to the condo manager immediately as this typically indicates a common element stack issue.

The corporation carries insurance for common elements and the standard unit. Unit owners carry their own condo unit owner policy for personal property and betterments. When a leak occurs, which policy responds first depends on whether the source is in a common element or within the unit. Both parties should file claims and let insurers determine allocation.

Yes, for plumbing within your unit that does not affect common elements. Work that affects or connects to common elements typically requires coordination with or approval from the condo corporation. Check your condo's rules and declaration before proceeding with any plumbing work.