Skill Level Legend:
Beginner: Simple tools, no flame or cutting involved. Great for first-timers.
Intermediate: Requires basic plumbing knowledge and comfort with hand tools or heat.
Advanced: Complex techniques, potential for damage if done incorrectly. Best left to professionals.
Skill Level:🟡 Intermediate
When it comes to combining style and function in a small bathroom, few fixtures deliver like a pedestal sink. With its clean lines and space-saving design, it can instantly refresh a powder room or tight ensuite. But while installing one may seem straightforward, the plumbing can be a bit tricky due to the sink’s open, exposed base.
This step-by-step guide will walk you through the process of plumbing a pedestal sink the right way, so you can enjoy a clean, professional-looking finish without costly leaks or damage.
What You’ll Need:
📌Pedestal sink (basin + pedestal)
📌P-trap kit
📌Supply lines (hot and cold)
📌Shutoff valves (if not already installed)
📌Basin wrench
📌Pipe wrench or adjustable wrench
📌Pipe tape (Teflon tape)
📌Plumber’s putty or silicone caulk
📌Level
📌Pencil
📌Tape measure
📌Drill (if wall mounting is needed)
Step 1: Shut Off the Water
Before doing anything, turn off the water at the shutoff valves located beneath your existing sink. If no shut offs are present, turn off your home’s main water supply. Open the faucet to release pressure and drain remaining water from the lines.
Step 2: Remove the Old Sink
Carefully disconnect the water supply lines and the drain trap. Loosen any mounting hardware holding the old sink in place. Once everything is detached, remove the old sink and clean the area thoroughly. This is also a good time to inspect and possibly upgrade your shutoff valves and wall plumbing, especially if they’re outdated or corroded.
Step 3: Position the Pedestal Sink
Unbox your new pedestal sink and place it near the wall to determine final placement. Use a level to make sure the basin sits flat and true. Mark the mounting holes for the sink basin and pedestal base with a pencil. Be sure your drain and supply lines align with the openings in the pedestal.
Step 4: Install the Faucet and Drain Assembly
It’s much easier to attach the faucet and drain assembly before mounting the sink to the wall. Follow the manufacturer’s instructions and don’t forget to use plumber’s putty or silicone around the drain flange to prevent leaks. Attach the supply lines to the faucet tailpieces but don’t connect them to the shutoffs just yet.
Step 5: Mount the Sink Basin
Line up the basin with your earlier markings and fasten it to the wall using the provided hardware. You may need wall anchors if studs aren’t located where your holes are. Once mounted, position the pedestal base under the basin. Ensure it supports the sink’s weight and hides the plumbing as intended. Make minor adjustments as needed to keep everything level.
Step 6: Connect the Water Supply Lines
Wrap Teflon tape around the threads of the shutoff valves, then connect your hot and cold supply lines. Tighten with a wrench, being careful not to over-tighten and crack any fittings. Turn the shutoff valves back on and check for leaks.
Step 7: Install the P-Trap and Drain
Attach the trap arm to the wall drain stub-out and connect the U-bend to the sink tailpiece. Make sure all connections are snug and aligned. Use slip joint pliers or a pipe wrench to secure fittings. Once everything is in place, run water through the sink to test for leaks. If you see drips, carefully tighten the connections.
Step 8: Seal and Finalize
Apply a bead of silicone caulk around the base of the pedestal and where the sink meets the wall. This helps prevent water from seeping into gaps and causing damage. Clean up any excess putty or caulk, give everything one final inspection, and enjoy your newly installed pedestal sink!
Pro Tips:
Take your time during alignment visible plumbing means visible mistakes.
Keep a bucket and towels nearby in case of unexpected leaks.
If your wall plumbing doesn’t line up with the pedestal, consider installing a flexible drain extension or consulting a plumber.
Why It’s Worth It:
Installing a pedestal sink isn’t just about aesthetics, it can make a small bathroom feel larger and more open. By keeping the plumbing neat and tidy, and the installation solid, you ensure functionality as well as style. With a little patience and the right tools, this project is completely doable for a confident DIYer with intermediate plumbing skills. And of course, if you’re ever in doubt, The Great Plumbing Co. is just a call away to help make your vision a leak-free reality.
The Great Plumbing Co.
For nearly three decades, The Great Plumbing Co. has been providing exceptional plumbing services for homeowners as well as business owners throughout Toronto and the GTA. Whether you’re dealing with a leaky hose bib, a clogged drain, or a toilet repair and service you can trust The Great Plumbing Co. to deliver timely solutions tailored to your specific requirements.
Contact us or book online to schedule your residential plumbing appointment.
