Mia Stone
Converting a shower to a tub often requires relocating the existing drain to accommodate the new tub's configuration, a task that demands careful planning and execution. The process involves assessing the current plumbing layout, determining the optimal position for the new drain, and ensuring compliance with local building codes. Homeowners must consider factors such as the tub’s dimensions, the slope of the drainpipe, and the availability of space beneath the floor. While DIY enthusiasts may attempt this project, hiring a licensed plumber is recommended to avoid costly mistakes and ensure proper functionality. This guide will outline the steps, tools, and considerations needed to successfully move the drain and complete the shower-to-tub conversion.
| Characteristics | Values |
|---|---|
| Project Type | Bathroom Renovation |
| Primary Goal | Convert Shower to Tub |
| Key Task | Move Drain Location |
| Required Skills | Plumbing, Tile Work, Carpentry |
| Tools Needed | Wet Saw, Drill, Pipe Cutter, Wrenches, Level, Measuring Tape |
| Materials Needed | New Drain Assembly, Tub, Mortar, Tile, Grout, Waterproofing Membrane |
| Drain Types | Center Drain (Common for Tubs), Offset Drain (Shower-to-Tub Conversion) |
| Steps Involved | 1. Remove Shower Base/Tiles 2. Relocate Drain Pipes 3. Install New Drain Assembly 4. Build Subfloor for Tub 5. Install Tub 6. Tile/Finish Walls |
| Permits Required | Plumbing Permit (Check Local Codes) |
| Cost Range | $2,000 - $8,000 (Depending on Materials & Labor) |
| Timeframe | 3-7 Days (Professional), 1-2 Weeks (DIY) |
| Challenges | Matching Existing Tile, Proper Waterproofing, Ensuring Drain Slope |
| Professional Help | Recommended for Plumbing & Tile Work |
| Maintenance | Regular Caulking, Grout Sealing, Drain Cleaning |
| Benefits | Increased Home Value, Improved Bathing Experience |
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What You'll Learn
Planning the Layout
When planning the layout for moving a drain to convert a shower to a tub, the first step is to assess the existing bathroom configuration. Measure the dimensions of the space, noting the location of the current shower drain, water supply lines, and any obstructions such as walls, windows, or fixtures. Determine the ideal placement for the new tub, ensuring it aligns with the bathroom’s aesthetic and functional needs. Consider the size and shape of the tub, allowing adequate clearance for access and maintenance. Sketch a rough floor plan to visualize the changes and identify potential challenges, such as relocating plumbing or modifying structural elements.
Next, evaluate the plumbing requirements for the drain relocation. Standard shower drains are typically 2 inches in diameter, while tub drains require a 1.5-inch pipe. Decide whether the existing drain can be adapted or if a new drain line needs to be installed. Check local building codes to ensure compliance with regulations regarding drain slope (typically 1/4 inch per foot) and venting. If the tub will be placed in a different location, plan the route for the new drain pipe, considering the shortest and most direct path to the main stack or existing drainage system. Use your floor plan to map out the plumbing adjustments needed.
Consider the impact of the tub installation on the bathroom’s overall layout. Ensure the new tub does not interfere with door swings, toilet clearance, or other fixtures. Plan for the addition of a tub filler and showerhead if you intend to include a shower function. Decide whether to install a freestanding tub, alcove tub, or drop-in tub, as each type has different space and plumbing requirements. Account for the height of the tub and any necessary waterproofing or structural reinforcements, especially if the tub will be placed on a second floor.
Incorporate accessibility and safety into your layout planning. Ensure the tub is easily accessible, with enough space to enter and exit comfortably. Consider adding grab bars or a non-slip surface around the tub area. If the tub will have a shower function, plan for a shower curtain or door that doesn’t obstruct the space. Think about the placement of controls and fixtures to ensure they are within reach and user-friendly.
Finally, consult with a professional plumber or contractor to review your layout plan. They can provide insights into feasibility, potential issues, and cost estimates. Discuss the materials needed, such as new drain pipes, fittings, and waterproofing membranes. A professional can also help identify any structural modifications required, such as reinforcing the floor to support the weight of the tub and water. With a well-thought-out layout plan, you’ll be better prepared to execute the conversion efficiently and avoid costly mistakes.
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Removing Existing Drain
Before you begin the process of moving the drain to convert a shower to a tub, the first critical step is removing the existing drain assembly. Start by turning off the water supply to the shower to avoid any accidental spills or leaks. Next, remove the showerhead and any remaining water from the shower area to ensure a dry workspace. Place a bucket or towel beneath the drain to catch any water or debris that may come loose during the removal process.
With the area prepped, focus on the drain cover. Most shower drains have a screw or a set of screws holding the cover in place. Use a screwdriver to carefully remove these screws, taking note of their size and placement for reassembly or future reference. Once the screws are removed, gently pry the drain cover off using a flathead screwdriver or a drain key tool. Be cautious not to damage the surrounding tile or shower floor during this step.
After removing the drain cover, you’ll expose the drain body or strainer. This component is typically secured with a locking nut or a series of screws underneath the shower pan or floor. Accessing this area often requires cutting a small hole in the subfloor or crawling into the space below the shower (if accessible). Use a wrench or pliers to loosen and remove the locking nut, turning it counterclockwise. If the nut is corroded or difficult to turn, apply penetrating oil and allow it to sit for a few minutes before attempting again.
Once the locking nut is removed, carefully lift the drain body out of the shower pan. Inspect the area for any old plumber’s putty, caulk, or debris, and clean it thoroughly. If the drain is glued or sealed in place, use a utility knife or oscillating tool to carefully break the seal without damaging the shower pan. Take note of the drain’s size and configuration, as this information will be crucial when installing the new drain for the tub.
Finally, with the existing drain removed, assess the condition of the shower pan and surrounding area. If there is any water damage, rot, or mold, address these issues before proceeding with the tub installation. Patch any holes in the subfloor and ensure the area is structurally sound. Properly removing the existing drain sets the foundation for a successful conversion from shower to tub, ensuring the new drain can be installed correctly and securely.
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Relocating Drain Pipes
To relocate the drain, you’ll need to cut into the existing drain pipe using a hacksaw or PVC cutter, depending on the material. Carefully disconnect the pipe at the appropriate point, taking note of the direction and angle of the existing plumbing. Use a tubing cutter for copper pipes or a reciprocating saw for cast iron, ensuring clean cuts to facilitate new connections. Once the old pipe is removed, measure and cut a new section of pipe to bridge the gap between the existing plumbing and the new drain location. Use appropriate fittings, such as elbows or couplings, to maintain the required slope (typically 1/4 inch per foot) for proper drainage.
After cutting and fitting the new pipe sections, assemble the pieces using solvent cement for PVC or threaded fittings for metal pipes. Double-check all connections for tightness and alignment before securing them in place. If the new drain location requires additional support, install hangers or straps to hold the pipes securely. Ensure the new drain pipe aligns perfectly with the tub’s drain hole, as misalignment can cause installation issues later. Test the slope by pouring water through the pipe to confirm it flows smoothly toward the main drain line.
Once the drain pipe is relocated and secured, install the tub’s drain assembly according to the manufacturer’s instructions. This typically involves attaching the drain strainer to the tub and connecting it to the newly relocated pipe. Use plumber’s putty or silicone sealant to create a watertight seal around the drain flange. After installation, perform a leak test by filling the tub with water and checking for any drips or moisture around the connections. Address any leaks immediately by tightening fittings or applying additional sealant.
Finally, insulate the relocated drain pipe to prevent condensation and potential freezing in colder climates. Use foam insulation sleeves or wrap the pipes with insulation tape, ensuring all exposed areas are covered. Once the plumbing is complete, proceed with installing the tub and finishing the surrounding walls and flooring. Relocating drain pipes requires precision and adherence to plumbing codes, but with careful planning and execution, it’s a manageable task that paves the way for a successful shower-to-tub conversion.
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Installing Tub Drain
When converting a shower to a tub, one of the critical steps is relocating and installing the tub drain. The process begins with assessing the existing plumbing layout to determine the new drain location. Typically, the tub drain should align with the existing shower drain to minimize plumbing modifications. However, if relocation is necessary, you’ll need to cut into the subfloor to access the drain pipes. Ensure the new drain location complies with local building codes, which often specify the height and positioning relative to the tub. Use a hole saw or reciprocating saw to create an opening in the subfloor for the new drain assembly, taking care not to damage any underlying structures.
Next, prepare the new drain assembly by assembling the components according to the manufacturer’s instructions. Most tub drains consist of a strainer, shoe, and tailpiece. Apply plumber’s putty or silicone sealant around the strainer to create a watertight seal when installed in the tub. Insert the strainer into the tub’s drain hole and secure it from underneath using the provided washer and nut. Tighten the nut carefully to avoid cracking the tub material. Attach the tailpiece to the strainer, ensuring it aligns with the direction of the new drain pipe.
With the drain assembly in place, focus on connecting it to the existing plumbing. If the new drain location is offset from the original shower drain, you’ll need to install a drain extension or reconfigure the P-trap. Use PVC or ABS piping, depending on your existing system, and ensure all connections are secure with solvent cement. Test the slope of the drain pipe to ensure proper water flow—it should have a gradient of 1/4 inch per foot toward the main drain line. Double-check that the P-trap is installed correctly to prevent sewer gases from entering the bathroom.
Once the plumbing connections are complete, secure the drain assembly to the subfloor using screws or brackets to prevent movement. Insulate any exposed pipes to reduce condensation and noise. Finally, test the drain by pouring water into the tub and checking for leaks at all connections. If leaks are detected, tighten fittings or reapply sealant as needed. After confirming the drain functions correctly, proceed with installing the tub and finishing the surrounding walls and flooring. Proper installation of the tub drain ensures longevity and prevents water damage, making it a crucial step in the shower-to-tub conversion process.
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Testing for Leaks
Once you’ve relocated the drain as part of converting your shower to a tub, testing for leaks is a critical step to ensure the plumbing is secure and functional. Start by turning off the water supply to the area to avoid any accidental spills during the test. Next, inspect all connections, including the new drain assembly, pipes, and fittings, for any visible signs of moisture or dripping. Even a small amount of water around the joints can indicate a potential leak. Use a dry cloth or paper towel to wipe down the area, making it easier to spot any new moisture during the test.
With the area inspected, turn the water supply back on and slowly fill the tub to its maximum capacity. Pay close attention to the drain and the surrounding pipes as the water level rises. Look for any signs of water seeping through the connections or pooling around the base of the tub. If you notice any leaks, immediately turn off the water supply and tighten the affected fittings or replace faulty components before proceeding.
After filling the tub, let it sit for at least 30 minutes to an hour to simulate prolonged use. During this time, periodically check the drain and pipes for any new signs of leakage. Also, inspect the ceiling or floor below the bathroom for any water stains or dampness, as this could indicate a hidden leak in the plumbing system. If you detect any issues, address them promptly to prevent water damage.
Once the tub has been full for the allotted time, drain the water completely and repeat the inspection process. Watch the drain closely as the water empties to ensure there are no leaks around the trap or the pipe connections. If the drain assembly was installed correctly, the water should flow smoothly without any visible seepage. After draining, dry the area again and leave it overnight, checking the next day for any delayed signs of moisture.
Finally, test the tub’s functionality by running water through the faucet and allowing it to drain multiple times. This will help identify any leaks that may only appear under pressure or during active use. If no leaks are detected after these tests, the drain relocation and tub installation are likely secure. However, it’s a good practice to periodically check for leaks in the future, especially after heavy use or if you notice any changes in water flow or drainage.
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Frequently asked questions
Moving the drain is often necessary when converting a shower to a tub, but it’s not the only step. You’ll also need to adjust plumbing, ensure proper slope for drainage, and possibly modify the subfloor to accommodate the tub’s size and weight.
Moving the drain can range from moderately difficult to complex, depending on your plumbing setup and floor structure. It often requires cutting into the subfloor, relocating pipes, and ensuring proper alignment with the new tub’s drain. Hiring a professional plumber is recommended.
Yes, in most areas, you’ll need a permit for plumbing modifications like moving a drain. Check with your local building department to ensure compliance with codes and regulations.
Tools typically include a reciprocating saw or jigsaw for cutting the subfloor, a wrench or pliers for adjusting pipes, a drain kit for the new tub, and possibly a level to ensure proper slope for drainage.
While it’s possible to move the drain yourself if you’re experienced in plumbing and construction, hiring a professional is often the safer and more efficient option. Mistakes can lead to leaks, water damage, or code violations.
