How to Install a Shower Drain in a Concrete Floor


When it comes to building or renovating a bathroom, one of the crucial components to consider is the shower drain. A properly installed shower drain ensures efficient water drainage, preventing potential water damage and mold growth.

Installing a shower drain in a concrete floor might seem like a daunting task, but with the right tools, materials, and a systematic approach, you can achieve a successful and durable installation. In this comprehensive guide, we will walk you through the step-by-step process of installing a shower drain in a concrete floor.

Things You Need to Know Before Installing shower drain in concrete floor

So, you’re taking the plunge and installing a shower drain in your concrete floor. Before you roll up your sleeves and dive in, there are a few key points you should be aware of. This isn’t a project that you can rush into without a little bit of knowledge under your belt. Here are the essentials you need to know before you get started: 

  • Understand the Basics of Plumbing: It’s crucial to have a basic understanding of plumbing. You don’t need to be a pro, but knowing the difference between a P-trap and a pipe wrench is definitely a plus.
  • Know your Building Codes: Each locality has its own building codes and regulations. Make sure you understand the specifics for your area to avoid any legal hassles post-installation.
  • Get the Right Tools: This project requires specific tools. You’ll need more than your standard hammer and nails for this job. Things like a concrete drill, pipe cutter, and wrenches are essential.
  • Be Patient and Precise: Working with concrete requires care and precision. You only get one shot at it, so make sure you measure twice and cut once.
  • Consider the Floor Slope: The floor of your shower needs to be sloped properly towards the drain. This ensures the water flows away efficiently, and doesn’t pool.
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Tools and Materials You’ll Need

Before you start the installation process, gather all the necessary tools and materials. Having everything on hand will make the process smoother and more efficient. Here’s a list of what you’ll need:


  1. Adjustable wrench
  2. Screwdriver
  3. Hacksaw
  4. Tape measure
  5. Chalk line
  6. Power drill
  7. Masonry drill bit
  8. Hammer
  9. Pipe cutter
  10. Level
  11. Safety goggles and gloves


  1. Shower drain kit (including drain assembly, rubber gasket, and locking ring)
  2. PVC or ABS drain pipe
  3. Concrete mix
  4. Gravel
  5. Teflon tape
  6. Waterproofing membrane
  7. Drainage mortar
  8. Pipe primer and cement
  9. Silicone caulk
  10. PVC pipe fittings

Step-by-Step Installation Guide

Preparing the Work Area

  1. Plan the Location: Before you start the installation, determine the optimal location for the shower drain. It should be positioned in the center of the shower floor to ensure proper water drainage.
  2. Mark the Location: Use a chalk line to mark the center of the shower floor. Double-check the measurements to ensure accuracy.

Installing the Drain Base

  1. Prepare the Concrete Floor: Using a power drill and masonry drill bit, create a hole in the marked location. The hole should be slightly larger than the drain pipe.
  2. Insert the Drain Pipe: Apply primer and cement to the end of the drain pipe and insert it into the hole. Make sure it sits securely and vertically.
  3. Attach the Drain Base: Place the drain base over the drain pipe. Ensure that it sits flush with the floor surface.

Creating the Slope

  1. Build the Slope: To ensure proper water drainage, create a slight slope in the concrete floor using a mix of concrete and gravel. The slope should direct water toward the drain.
  2. Use a Level: Place a level on the sloped surface to ensure it is even and has the correct slope towards the drain.
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Installing the Drain Assembly

  1. Assemble the Drain: Follow the manufacturer’s instructions to assemble the shower drain. This usually involves attaching the rubber gasket and locking ring to the drain base.
  2. Insert the Drain Grate: Place the drain grate on top of the assembled drain. Make sure it fits securely and aligns with the surrounding floor.

Waterproofing and Sealing

  1. Apply Waterproofing Membrane: Apply a waterproofing membrane over the entire shower floor area, including the drain. This will prevent water from seeping into the concrete and causing damage.
  2. Seal the Edges: Apply silicone caulk around the edges of the drain grate and where the floor meets the wall. This further enhances waterproofing and prevents leaks.

Connecting the Drain Pipe

  1. Cut and Measure the Pipe: Use a pipe cutter to cut the PVC or ABS drain pipe to the required length. Measure and dry-fit the pipe to ensure a proper fit.
  2. Apply Teflon Tape: Wrap Teflon tape around the threads of the pipe fittings to create a watertight seal.
  3. Connect the Pipe: Attach the pipe fittings to the drain pipe and secure them using an adjustable wrench. Make sure the connections are tight.

Finalizing the Installation

  1. Mix and Pour Mortar: Prepare drainage mortar according to the manufacturer’s instructions. Pour it around the drain pipe and over the waterproofing membrane. Smooth the surface with a trowel, ensuring a gradual slope towards the drain.
  2. Allow Drying: Let the mortar dry completely as per the manufacturer’s recommendations. This step ensures a solid and stable foundation for the shower floor.
  3. Test the Drain: Run water into the shower to test the drainage system. Check for any leaks or issues and make necessary adjustments.

What are the common mistakes to avoid when installing a shower drain in a concrete floor?

 We’re going to explore some common pitfalls that can spring up during this project. Forewarned is forearmed, right? 

  • Incorrect measurements: Measure twice, cut once. That’s a golden rule in any DIY project. Make sure to get the precise dimensions for your shower drain and the location where it needs to be installed. A small miscalculation can lead to significant problems.
  • Wrong tools or materials: Not all shower drains and concrete floors are created equal. Using the wrong type of drain, or substandard concrete-cutting tools, can potentially ruin your project.
  • Ignoring local building codes: Always check local regulations before starting. Some areas have specific requirements for shower drain installations, and non-compliance can be costly.
  • Insufficient slope: Drainage relies on gravity. If your shower floor isn’t sloped correctly towards the drain, water won’t flow as it should. This can result in pooling or even worse, water damage.
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Safety Precautions

Let’s talk about how to keep you safe during this project. 

  • Dress Appropriately: Concrete work can be messy. Wear old clothes that you don’t mind getting dirty. More importantly, wear sturdy shoes to protect your feet from any falling tools or sharp objects.
  • Use Safety Gear: Never underestimate the importance of safety glasses, gloves, and a dust mask. These will protect your eyes, hands, and lungs from concrete dust and debris.
  • Handle Tools with Care: Be it a jackhammer, drill, or even a simple wrench, handle each tool with respect and care. Remember, a moment’s carelessness can lead to a serious injury.


Installing a shower drain in a concrete floor requires careful planning, precise execution, and the use of appropriate tools and materials. By following this step-by-step guide, you can successfully install a shower drain that provides efficient water drainage, prevents water damage, and contributes to the overall functionality and aesthetics of your bathroom.

Remember to prioritize safety and accuracy throughout the installation process, and don’t hesitate to seek professional assistance if you encounter challenges along the way. With the right approach, you’ll have a properly functioning and durable shower drain that enhances your bathroom experience for years to come.

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