06/12/2026
This is the single most reviled water shutoff valve in the GTA.
It's common throughout the city and is notorious for not shutting off even when the handle is moved to the closed position.
It's common enough that we warn our trainees about it during training.
They're instructed to look for the main shutoff, which is usually located under the sink at the rear in the bathroom in the master bedroom.
Even worse, this particular valve had just recently been installed throughout the entire building. Our technician warned the customer and instructed them on where to find the main shutoff.
A month prior, our technician warned another customer about this valve. In the most ironic moment of all, they closed the valve, ran the washer, and it still filled (the valve didn't close, so the washer was still being supplied with water). The customer immediately called for a plumber to have it replaced.