What's the maximum distance a toilet can be from the main waste stack in condo units?

In condos, toilets need a pretty direct connection to the main waste stack to avoid blockages. The general guideline is that the horizontal run from the toilet to the stack shouldn’t exceed about 3 to 4 feet, or roughly 1 metre, before it starts to slope properly into a vertical stack. Longer runs can work, but you need to maintain the right slope—about 1 to 2 percent—so waste and water flow freely. Since you’re considering moving it about 2 metres, that’s pushing the limit. You’d need to make sure the pipe has a consistent downward slope and that all fittings are properly sized. It’s also important to keep it accessible, as you mentioned, for future maintenance. A plumber experienced with condo layouts can confirm if this is doable without risking clogs or backflow.

In a condo, a toilet can usually be moved up to about 2–3 meters from the main waste stack if it’s done properly. The toilet is often placed close to the main pipe because it’s easier to keep the correct slope, and it reduces plumbing problems. A longer horizontal pipe is not a problem as long as The pipe is 3 inchesIt has the right slop It is properly vented If the slope is wrong or the pipe is too small, waste can get stuck. Since everything must stay above the concrete floor, space for slope is the main limit. Bottom line: 2 meters is usually fine if installed correctly and approved by the condo.

Hello! Ontario does NOT regulate toilet placement by “distance to the main stack.” A toilet in Ontario can be located any distance from the main waste stack, provided the trap arm length to the vent does not exceed: • 3.0 m (10 ft) for 3″ pipe • 6.0 m (20 ft) for 4″ pipe Most condo toilets use 4″ horizontal branches Everything else is a design choice, not a code violation. Hope it helps