The Ultimate Guide: How to Connect 2 Toilets Together Seamlessly

Connecting Two Toilets: A Comprehensive Guide

Connecting two toilets to a single drain line can be a practical solution for homes with multiple bathrooms or for creating an additional toilet in a basement or garage. This process, known as plumbing a toilet stack, involves some basic plumbing skills and the right tools. Here's a step-by-step guide to help you understand how to connect two toilets together.

Understanding Toilet Stacks

Before you begin, it's essential to understand what a toilet stack is. A toilet stack is a plumbing configuration where two or more toilets are connected to a single drain line, typically using a stack pipe that runs vertically through the wall. This setup is common in multi-story buildings and can save space and reduce the complexity of your plumbing system.

Tools and Materials Needed

To connect two toilets together, you'll need the following tools and materials:

• Adjustable wrench
• Crescent wrench
• Hacksaw
• Plumber's putty
• Teflon tape
• Two toilets
• Two wax rings
• Two closet flanges
• Two 3-inch PVC pipes (for the stack)
• Two 3-inch PVC 90-degree elbows
• Two 3-inch PVC couplings
• PVC cement
• PVC primer

Preparation

Before you start, turn off the water supply to both toilets and drain the water from the tanks and bowls. This will make the installation process safer and easier. Also, ensure that the floor is level and can support the weight of the toilets.

Installing the First Toilet

Start by installing the first toilet following these steps:

1. Position the closet flange in the floor opening, ensuring it's level and centered.
2. Apply plumber's putty around the base of the toilet and set it onto the closet flange, ensuring the bolts on the toilet base align with the holes in the flange.
3. Secure the toilet to the flange using the bolts and nuts, and tighten them with an adjustable wrench.
4. Connect the water supply line to the toilet tank and turn on the water supply to test for leaks.

Creating the Toilet Stack

Now that the first toilet is installed, it's time to create the toilet stack:

1. Measure and cut the PVC pipes to the desired height, ensuring they're long enough to reach the second-floor ceiling but not so long that they create a siphon effect.
2. Apply PVC primer to the ends of the pipes and the insides of the elbows and couplings.
3. Glue the 90-degree elbow to one end of the pipe, creating a vertical section of the stack.
4. Glue the coupling to the other end of the pipe, creating a horizontal section of the stack that will connect to the second toilet.
5. Repeat steps 3-4 to create the second section of the stack, which will connect to the first toilet.
6. Connect the two sections of the stack using a coupling, ensuring they're securely glued together.

Installing the Second Toilet

With the toilet stack in place, you can now install the second toilet:

1. Position the second closet flange onto the horizontal section of the stack, ensuring it's level and centered.
2. Apply plumber's putty around the base of the second toilet and set it onto the second closet flange, ensuring the bolts on the toilet base align with the holes in the flange.
3. Secure the toilet to the flange using the bolts and nuts, and tighten them with an adjustable wrench.
4. Connect the water supply line to the toilet tank and turn on the water supply to test for leaks.

Testing the Toilets

Once both toilets are installed and connected to the stack, it's essential to test them to ensure they're working correctly:

1. Flush both toilets simultaneously to check for any leaks or blockages in the stack.
2. Listen for any unusual noises or signs of leaks around the toilets and stack.
3. If everything seems to be working correctly, you're done! If not, double-check your connections and ensure there are no blockages in the stack.

Connecting two toilets together can be a complex task, but with the right tools and a careful approach, it's well within the reach of a DIY enthusiast. Always remember to prioritize safety and follow local building codes when performing any plumbing work. If you're unsure about any aspect of the process, don't hesitate to consult a professional plumber.