How to Move Shower Plumbing From One Wall to Another

Dreaming of a more functional or stylish bathroom layout? You’re not alone. Many homeowners want to move shower plumbing from one wall to another to open up space, improve flow, or modernize their bathroom—but don’t know where to start. Whether you’re tackling a full remodel or just repositioning your shower, this guide walks you through the process with clarity, safety, and confidence.

Why Would You Move Shower Plumbing?

Before diving into the “how,” it’s important to understand the “why.” Common reasons include:

• Bathroom layout redesign (e.g., converting a tub-shower combo to a walk-in shower)
• Accessibility upgrades (e.g., installing a curbless shower for aging-in-place)
• Aesthetic preferences (e.g., moving the showerhead to a feature wall)
• Structural changes (e.g., knocking down a wall during a renovation)

According to the National Association of Home Builders (NAHB), over 60% of bathroom remodels in 2024 included some form of plumbing reconfiguration—proof that rerouting pipes is more common than you might think.

Is It Possible to Move Shower Plumbing?

Yes—but with caveats. Moving shower plumbing is technically feasible in most homes, but complexity depends on:

• Your home’s framing (wood vs. concrete)
• Existing pipe material (copper, PEX, PVC)
• Distance to the main drain and water supply lines
• Local building codes

💡 Pro Tip: Always check with your local building department before starting. Permits are often required for plumbing modifications.

For authoritative background on plumbing systems, refer to the Wikipedia entry on domestic water supply .

Tools & Materials You’ll Need

Before you begin, gather these essentials:

• Pipe cutter or hacksaw
• PEX crimping tool (if using PEX tubing)
• Adjustable wrenches
• Level and measuring tape
• Stud finder
• Drywall saw
• Pipe insulation (for cold climates)
• Shut-off valves
• Drain-waste-vent (DWV) fittings
• Waterproofing membrane (e.g., Schluter-Kerdi)

Note: If you’re not experienced with soldering copper or working with pressurized lines, consider hiring a licensed plumber.

Step-by-Step: How to Move Shower Plumbing From One Wall to Another

Step 1: Turn Off Water & Drain Lines

Shut off the main water supply. Open faucets to drain residual water from pipes. For the drain line, plug it temporarily to prevent sewer gases from entering.

Step 2: Remove Existing Fixtures & Drywall

Carefully remove the shower valve, showerhead, and trim. Cut away drywall to expose studs and existing plumbing. Use a stud finder to avoid cutting into electrical wires.

Step 3: Plan the New Route

Map the shortest, most efficient path to the new wall. Ideal vertical runs minimize bends. Remember:

• Supply lines can be rerouted more easily than drains.
• Drain lines must maintain a ¼-inch-per-foot slope toward the main stack (per IPC code).

Step 4: Frame the New Wall Opening (If Needed)

If the new location lacks framing access, you may need to open the adjacent wall or notch studs (never cut more than 60% of a load-bearing stud’s depth).

Step 5: Install New Supply Lines

Use PEX tubing (preferred for DIY due to flexibility and no-solder joints). Run hot and cold lines from the existing manifold or water heater to the new valve location. Secure with clips every 32 inches.

✅ Best Practice: Install serviceable shut-off valves behind an access panel for future maintenance.

Step 6: Reroute the Drain Line

This is the trickiest part. The new drain must connect to the existing waste stack while maintaining proper slope. Use 2-inch PVC pipe for showers. Dry-fit all connections before gluing.

Step 7: Pressure Test & Inspect

Before closing walls:

• Cap the lines and pressurize with water (50–80 PSI for 15 minutes).
• Check for leaks.
• Schedule a plumbing inspection if required by code.

Step 8: Waterproof & Finish

Apply a waterproofing membrane to the shower walls and pan. Then install tile, fixtures, and drywall as usual.

Cost Considerations: DIY vs. Hiring a Pro

Source: HomeAdvisor 2025 Cost Guide

⚠️ Warning: A poorly rerouted drain can cause slow drainage, clogs, or even sewage backup. When in doubt, call a pro.

Common Mistakes to Avoid

• Ignoring venting: Every drain needs a vent to prevent siphoning and odor.
• Skipping permits: Unpermitted work can void insurance or complicate home sales.
• Using wrong pipe size: Shower drains require 2-inch minimum; supply lines are typically ½-inch.
• Poor slope on drain: Less than ¼” per foot = standing water and mold risk.

FAQ: Your Top Questions Answered

Q1: Can I move shower plumbing without opening the floor?

A: Yes—if you’re only moving the showerhead and valve on the same level and can route supply lines through walls or ceiling. However, drain relocation almost always requires subfloor access unless you raise the shower base.

Q2: How far can I move a shower drain?

A: Technically, there’s no strict distance limit—but every extra foot adds complexity. The drain must maintain slope and connect properly to the vent stack within 5–6 feet (per most codes) unless re-vented.

Q3: Do I need a permit to move shower plumbing?

A: In nearly all U.S. jurisdictions, yes. Plumbing modifications affecting drainage or water supply require inspection. Check with your local building department.

Q4: Can PEX be used for shower plumbing?

A: Absolutely. PEX is code-approved for hot/cold water lines in all 50 states and is easier to install than copper. Just ensure you use oxygen-barrier PEX if connecting to a boiler system.

Q5: Will moving plumbing affect water pressure?

A: Only if you add excessive length or too many elbows. Keep runs as straight as possible. A 50-foot PEX run with 3–4 bends typically causes <5% pressure drop—negligible for most homes.

Q6: How long does it take to move shower plumbing?

A: A skilled DIYer may take 2–3 days. A professional plumber can often complete it in 1 day, assuming no structural surprises.

Conclusion

Moving shower plumbing from one wall to another is a challenging but achievable project that can dramatically improve your bathroom’s functionality and value. With careful planning, the right tools, and respect for plumbing codes, you can execute this upgrade safely—whether you DIY or hire help.

If this guide saved you time or stress, share it with a friend tackling their own bathroom remodel! And don’t forget to pin it on Pinterest or tweet it to your DIY community. Your next project just got a little easier.