10/17/2025
🚿 How to Install a Pedestal Sink — Step by Step by MS Group Construction
Thinking of replacing your old vanity with a clean, modern pedestal sink? 💡 Here’s a complete guide to help you understand what’s involved before you start your next bathroom upgrade project.
🔧 Tools You’ll Need:
🪛 Combination wrenches
🔩 Ratchet & sockets
🔨 Drill with bits
🪚 Jigsaw
🧰 Screws
🧱 Materials:
🚽 Pedestal sink
🚰 Faucet
🔩 Sink drain (if not included with the faucet)
🪵 2x6 support board (actual 1.5x5.5 in)
🔧 Screws for wall and floor anchoring
🧠 Before You Begin — Plan Ahead
Pedestal sinks come in two parts — the stand (pedestal) and the sink bowl.
Depending on the model, plumbing may fit inside the pedestal or remain partially visible. The sink itself mounts to the wall and rests securely on the stand.
📋 Important considerations before installation:
• Installing a pedestal sink is more technical than a drop-in vanity. Precise plumbing alignment and wall support are key.
• Pedestal sinks don’t provide storage like vanities — consider adding shelves or a wall-mounted cabinet for extra space.
• Removing an old vanity often exposes unfinished wall or flooring. Be prepared for small repairs or touch-ups.
• If water lines need to move, call a licensed plumber — this ensures your project meets code and prevents leaks later.
🪚 Step-by-Step Installation Guide
🔹 Step 1: Turn Off the Water Supply
Shut off both hot and cold water valves. Turn on the faucet to relieve line pressure. Place a bucket under the pipes to catch any remaining water before disconnecting supply lines and the drain.
🔹 Step 2: Remove Old Vanity
Cut along the backsplash with a utility knife to break the seal. Remove screws securing the vanity to the wall, detach the top, and lift it out carefully.
👉 This is a good time to inspect plumbing and decide if relocation or replacement is needed.
🔹 Step 3: Install a Wall Support Board
Some pedestal sinks require a solid support behind the wall for extra stability.
1️⃣ Mark your desired sink height.
2️⃣ Cut into the drywall and expose studs.
3️⃣ Use a jigsaw to notch the studs for the board.
4️⃣ Screw the 2x6 support board securely to the framing.
Once in place, patch, smooth, and paint the wall as needed.
🔹 Step 4: Prep the Wall & Floor
After repairs or painting, mark the centerline of your sink on both wall and floor.
Measure around 10 inches from the wall (or as per manufacturer specs) to position the pedestal. Make sure it’s perfectly centered and level.
🔹 Step 5: Mark and Drill Anchor Holes
Use your sink as a template. Mark anchor points for the wall hanger bolts and floor lag bolt. Remove the sink and pedestal, then drill pilot holes.
🔹 Step 6: Install the Hanger Bolts
Thread hanger bolts into the wall using a socket wrench, leaving about one inch exposed.
Secure the pedestal to the floor with a lag bolt and washer — don’t overtighten.
🔹 Step 7: Mount the Sink Bowl & Reconnect Plumbing
Attach your faucet and drain assembly before setting the sink bowl.
Slide the sink onto the hanger bolts and secure with cap nuts and washers. Reconnect the drain and water lines, then test for leaks.
💬 Common Questions
❓ Are pedestal sinks easy to install?
They require precision and sometimes two people — the porcelain parts are heavy and fragile. Plumbing alignment can be tricky but manageable with patience and the right tools.
❓ How do you attach a pedestal sink to the wall and floor?
The sink bowl mounts to the wall using hanger bolts, while the pedestal base anchors to the floor with a lag bolt and washer.
❓ How do you hide plumbing behind a pedestal sink?
For a seamless look, choose a pedestal design that conceals plumbing inside the stand. If not possible, opt for polished metal pipes instead of PVC — they look much more professional.
💡 Pro Tip from MS Group Construction
Always install a support board if your sink model allows it — it prevents stress cracks in the porcelain and keeps your sink secure for years. Also, check level frequently during setup. Small adjustments now will save big headaches later.
🧱 MS Group Construction Recommends:
If your bathroom plumbing needs to be rerouted or upgraded, leave it to the pros. Our licensed installers handle every step — from demolition and wall prep to plumbing and finishing touches — ensuring your new sink is beautiful, stable, and leak-free.
📞 Ready to upgrade your bathroom?
Contact MS Group Construction today for professional remodeling, tile work, and full bathroom installations across Michigan. Call us Today +1 313-355-0228
We bring precision, craftsmanship, and modern design to every home project.
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