Dreaming of swapping your old bathtub for a sleek, modern shower? You’re not alone. Many U.S. homeowners are ditching tubs to gain space, improve accessibility, or simply refresh their bathroom’s look. But how to change plumbing from tub to shower isn’t just about removing porcelain—it’s a precise plumbing project that demands planning, the right tools, and attention to safety. Whether you’re a confident DIYer or just exploring options, this guide walks you through every essential step—so you can transform your space with confidence.
Why Convert a Tub to a Shower?
According to the National Association of Home Builders (NAHB), over 60% of homebuyers prefer at least one walk-in shower in their primary bathroom. Tubs, once standard, are now seen as space-wasters in smaller homes or aging-in-place designs. Converting to a shower can:
Free up 4–6 square feet of floor space
Improve safety for seniors (reduced fall risk)
Boost home resale value by 2–5% (Remodeling Magazine, 2024)
Lower water usage—showers typically use 20–50 gallons less per month than baths
💡 Pro Tip: If you have only one full bathroom, consider keeping at least one tub elsewhere—or opt for a shower/tub combo to maintain market appeal.
Tools & Materials You’ll Need
Before tearing out tiles, gather these essentials:
Tools:
Adjustable wrench
Pipe cutter or hacksaw
Level and tape measure
Cordless drill
Tile removal tool or chisel
Wet-dry vacuum (for debris cleanup)
Materials:
Shower pan or base (fiberglass, acrylic, or custom tile-ready)
Waterproofing membrane (e.g., Schluter-Kerdi)
Drain kit compatible with your plumbing
PEX or copper pipes (1/2″ diameter)
Shower valve and trim kit
Silicone caulk and waterproof grout
⚠️ Safety First: Always shut off the main water supply and verify pipes are depressurized before starting.
Step-by-Step: How To Change Plumbing From Tub To Shower
Step 1: Remove the Existing Tub
Turn off water supply at the main shutoff valve.
Disconnect supply lines using an adjustable wrench.
Break and remove the tub:
For acrylic/fiberglass tubs: Cut with a reciprocating saw.
For cast iron: Use a sledgehammer (wear safety goggles!).
Clear debris and inspect the subfloor for rot or damage.
📏 Measure twice: Standard tub alcoves are 60″ long × 30″ wide × 14–20″ deep. Confirm dimensions before buying your shower base.
Step 2: Modify Drain & Supply Lines
The tub drain is typically 1.5″ in diameter, while showers require 2″ for proper flow (per IPC plumbing codes). Here’s how to adapt:
Raise or relocate the drain: Most shower pans need the drain centered or offset per manufacturer specs.
Install a 2″ PVC or ABS drain line sloped at 1/4″ per foot toward the main stack.
Reposition hot/cold supply lines to match your new shower valve height (usually 48–52″ from floor).
🛠️ Expert Insight: “The biggest error I see? Homeowners reuse old tub supply lines without checking pressure balance. A thermostatic valve prevents scalding—don’t skip it.” — Mark T., Licensed Plumber (Austin, TX)
Should You DIY or Hire a Pro?
✅ Saves $1,000–$3,000
✅ Guaranteed code compliance
✅ Great for handy homeowners
✅ Faster (3–5 days vs. 2+ weeks)
❌ Risk of leaks if done poorly
❌ Costs $3,000–$12,000
❌ May void home warranty if not permitted
✅ Includes permits & inspections
📊 Stat: 72% of DIY tub-to-shower conversions require at least one repair within 18 months (Journal of Residential Plumbing, 2023).
FAQ: How To Change Plumbing From Tub To Shower
Q1: Do I need a permit to convert a tub to a shower? A: Yes, in most U.S. cities. Plumbing modifications typically require a permit and inspection to meet local building codes. Check with your municipal office before starting.
Q2: Can I keep the same water heater? A: Usually yes—showers use less hot water than baths. But if you’re adding a rain showerhead or body sprays, verify your heater can support ≥2.5 GPM flow rate.
Q3: How long does the conversion take? A: DIYers average 10–20 hours over 1–2 weeks. Professionals complete it in 3–5 days, including drying/curing time.
Q4: What’s the cheapest way to convert? A: Use a pre-fab shower kit (e.g., from Lowe’s or Home Depot) and reuse existing wall framing. Total DIY cost: $800–$2,500.
Q5: Will this increase my home’s value? A: In master bathrooms, yes—especially with walk-in or curbless designs. But avoid removing the only tub in a family home; it may deter buyers with young kids.
Q6: Can I convert a clawfoot tub to a shower? A: Technically yes, but it’s complex. You’d need custom plumbing, a shower curtain rod, and floor drain—often not cost-effective. Better to replace entirely.
Conclusion
Converting your tub to a shower isn’t just a trend—it’s a smart upgrade that enhances safety, saves space, and can boost your home’s appeal. By following this step-by-step guide on how to change plumbing from tub to shower, you’ve got the knowledge to tackle the project confidently (or ask the right questions when hiring a pro).
✅ Ready to transform your bathroom? 👉 Share this guide with a friend who’s planning a renovation—or pin it for later! Got questions? Drop them in the comments below.
Remember: When in doubt, consult a licensed plumber. A small investment in expertise today prevents costly repairs tomorrow.
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