Plumber on the Plateau Mont-Royal.
Triplex stacks, cast iron, spiral staircases — we know them.
The Plateau is gorgeous until your 1920s drain stack reminds you it is also 1920s. Triplexes stacked three high, cast-iron pipes that have seen a century of pasta water, galvanized supply lines slowly closing up like arteries — this is the daily reality. Plomberie PSF works on the Plateau every week. CMMTQ-licensed, RBQ-certified, 10+ years of poking around behind those iconic spiral staircases. We get the building stock, we get the timing, we get there.
Cast-iron drain stacks giving up
After 100 years, the inside of your stack looks like a coral reef. Slow drains on every floor, gurgling toilets, mystery smells. We camera-inspect, descale, or replace the section — without tearing your triplex apart.
Galvanized supply lines clogging slowly
Pressure dropping in the kitchen? Brown water in the morning? Your galvanized supply is rusting from the inside out. We swap to copper or PEX section by section, working around your finishes and your tenants.
Shared stacks between floors
Triplex life means one floor clogs and three floors hear about it. We diagnose which unit is the actual culprit, snake or hydro-jet the right line, and explain it to every co-owner without the drama.
Why does my Plateau triplex drain so slowly?
Almost always cast iron that has scaled up over decades, plus grease and hair from three units feeding one stack. Plomberie PSF runs a camera, identifies the choke point, and clears it the right way — snake, hydro-jet, or partial replacement depending on the wall thickness left.
Can you work in an occupied triplex without shutting down all three units?
Yes. We schedule water shut-offs tight, communicate with tenants, and stage the work so only the unit being serviced loses water. CMMTQ-licensed crews, clean job site, and you get the timing in writing before we start.
Are old galvanized pipes worth replacing or just patching?
If pressure is already weak, patching just buys you a few months. We give you a straight answer after a quick visual + pressure check. When replacement makes sense, we usually do it in one day per unit and route around your existing finishes.
Do you do emergency calls on the Plateau at night?
All night, every night. Burst pipe, flooded basement, sewage backup — call (514) 665-6560 and we roll. Plomberie PSF runs 24/7 with techs already living in the city, so a Plateau call is almost always a fast arrival.
Plateau plumbing has its own personality. Cranky, charming, century-old. Plomberie PSF speaks fluent triplex — call (514) 665-6560 and we will be at your door, tools in hand, before the next gurgle.