20 Tips to Install Removable Bathtub

Removable bathtub: Installing a bathtub is a complex job that shouldn’t be attempted by novices. However, if you have some plumbing and construction experience, this may be a DIY project that you feel comfortable tackling. If you’re looking for a starting point, this guide provides an outline of the job. If you’re unsure what to do at any point in the process, it’s best to call a plumber. They can install the bathtub for you and ensure it’s to code.

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Removable bathtub

Removable bathtub: BusinessHAB.com

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1. Turn off the water at the main line.

The first step is to shut off the water for the bathroom you’ll be working in. Locate the main line and turn it all the way off. Then, turn on the faucet in your tub to drain the lines.

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2. Remove the accessories and disconnect the water lines.

Use a screwdriver to unscrew the faucet and disconnect it from the water lines by unscrewing it. Remove the handles, overflow drain cover, and the drain cover on the bottom of the tub. If you have a showerhead, remove that as well.

  • You may need to pry off a plastic cover to gain access to the screws.
  • You may be able to reuse some of these accessories, so keep them if you don’t want to buy new ones.

Removable bathtub

3. Remove the existing tub surround or tiles.

You need to expose the studs in the wall in order to install a new bathtub, so you must remove the existing surround and the drywall behind it. Using a utility knife, cut through the drywall around the outside edge of the entire surround. Then, use a pry bar to pry the drywall and surround or tiles out of place. Be careful not to damage any pipes or wires!

  • Be sure to wear safety gear, including goggles and a dust mask, throughout this process.
  • Work from the top of the surround down to the bottom.

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4. Gain access to the plumbing.

In some homes, you may be able to access the plumbing from the room next to the bathroom. In other cases, the plumbing may be situated in the floor under the tub. Most likely, you’ll need to cut a hole in the wall or floor in order to access the plumbing.

5. Take out the old tub.

First, unscrew the tub drain and overflow from the P-trap underneath the tub. If your tub is acrylic or fiberglass, cut it into pieces with a jigsaw to make the removal process easier. If you want to try to keep the tub in one piece, use a jigsaw to cut away the tub flange that’s nailed to the studs, then tip up the tub and pull it out.

  • You may need to slice through the caulk that connects the tub and floor before removing the tub. Use a utility knife to do so.
  • As you do this, check and see if you need to replace any damaged parts.

Removable bathtub

6. Select a tub that will fit in the designated space.

Measure the length and width of the alcove where you will install the tub. Also, measure the height and width of your bathroom doorway to make sure the tub will fit through the bathroom door! Take your measurements to a home improvement store to guide your purchase.

  • If you’re replacing an old tub, choose a new tub with a similar configuration and make sure the drain and faucets are on the same side and in roughly the same location to make installation easier.
  • Make sure your tub comes with all the faucets, drains, and accessories you will need. Typically, you’ll need a faucet, water handle(s), and the drain, which includes the drain chute, strainer, strainer cover, trip lever, stopper, linkage, and overflow drain cover.
  • If needed, remove any toilets or sinks that might get in the way of the installation.

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7. Dry-fit the tub in the alcove.

To ensure the tub fits, place it in the designated area. Check that the drain hole in the bottom of the tub lines up with the P-trap in the floor underneath the tub. Ensure you have the right fittings to connect the water supply lines to the faucet you purchased, as well.

  • Set the tub somewhere safe after you make sure it fits so you can move onto installing a ledger board.
  • Use caution to prevent scratches or other damage to your new tub!

8. Install a ledger board.

Cut a 2 by 4 in (5.1 by 10.2 cm) board to the length of the wall that the long edge of the tub will be placed against. Measure the height of the lip, or flange, of the tub, then mark that height measurement on the back wall. Use a drill to screw the ledger board to the studs in the wall so that the top of the ledger board is just below the flange when the tub is sitting level in the alcove.

  • A ledger board helps support the weight of the tub and ensures it can be securely attached to the wall.

Removable bathtub

9. Attach the drain to the tub.

Before you actually set the tub in place, secure the drain to it. Wrap the bottom of the strainer (the part of the drain you see on the inside of the bottom of the tub) with plumber’s putty and press it into the tub from the inside. Place a gasket around the strainer from the outside of the bottom of the tub, then screw the strainer to the drain chute, which a long pipe that includes the overflow drain.

  • Use pliers to tighten the strainer from the inside of the tub and remove any excess putty.

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10. Connect the overflow drain.

Slip the trip lever stopper and linkage through the overflow drain opening on the inside of the tub. Use a screwdriver to secure the overflow cover with the trip lever to the inside of the tub.

  • The trip lever is what you move up to prevent water from draining out of the tub. The stopper and linkage go inside the pipe to stop or allow the flow of water.
  • The overflow drain will prevent the tub from overflowing if you leave the water running as it directs the water into a drain pipe.

11. Set the tub in place and level it.

Carefully position the tub in the alcove so that the drain rests over the drain opening in the floor. Place a level on each side of the tub. If any spots are uneven, position hardwood shims underneath the tub and glue them in place.

  • Some manufacturers may advise you to spread mortar on the floor and set your tub on the mortar to secure it in place.

Removable bathtub

12. Secure the tub to the studs.

There will be a small flange, or vertical lip, around the outside of the tub. Follow the manufacturer’s directions to secure the flange to the studs in the wall. In most cases, you can use a hammer to drive roofing nails through the flange to secure it to each stud in the wall.

13. Fit a new tub surround.

The surround is made up of the panels that protect the wall around your tub from moisture and mildew. First, dry-fit the surround and mark the location of the accessories, including the faucet and water handles. Ensure that the faucet will line up with the water lines in the wall. Then, cut out the accessory openings with a jigsaw.

  • Make sure you measure the location for accessories multiple times before cutting into the surround!
  • A one-piece surround is the easiest type to install.

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14. Caulk the tub to the surround and secure the surround to the studs.

Place a bead of silicone caulk around the entire perimeter of the tub on the ledge next to the flange. Then, carefully set the surround on top of the silicone caulk. Next, use a drill to screw the surround into each wall stud. Aim to use a screw every 6 inches (15 cm) up the length of the surround.

  • Be sure to choose silicone caulk meant for use in bathrooms.

Removable bathtub

15. Connect the water lines and install your accessories.

Screw the faucet into the coupling for the water lines through the hole in the surround. Then, screw the strainer cover over the drain opening in the floor of the tub. Add any other accessories you need, such as handles if they are separate from your faucet.

16. Connect the drain to the P-trap.

Thread the drain chute into the P-trap under the tub. You may need to use PVC pipe to connect the drain chute to the P-trap if they don’t align perfectly. If that’s the case, dry-fit the pieces first and secure the PVC pipe to the chute and P-trap with ABS cement to prevent it from coming loose.

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17. Caulk the tub to the floor.

Run a bead of silicone caulk along the outside edge of the tub where it meets the floor. Make sure it meets both outside corners to prevent water from getting in between the tub and floor. Smooth out the bead with your finger or a damp rag.

Removable bathtub

18. Wait 24 hours before turning on the water.

To give the caulk and other adhesives time to dry, wait at least a full day. Then, you can turn on the water and check for leaks. If you find any problems, contact a certified plumber.

  • Goggles
  • Dust mask
  • Utility knife
  • Pliers
  • Screwdriver
  • Hammer
  • Pry bar
  • Roofing nails
  • Pencil or marker
  • Jigsaw
  • Silicone caulk
  • Caulk gun
  • Drill

Removable bathtub

20. More tips

  • Since tile damage is a given with this sort of project, you might want to select and purchase your replacement tiles beforehand. This helps speed up the process!
    • Wear appropriate safety gear, such as goggles and a dust mask.

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