How to Install a Delta Toilet

A Step-by-Step Guide to Installing a Water-Efficient Toilet

Delta WaterSense toilets are virtually clog-free and potentially offer savings of more than $90 per year in reduced water bills. Here’s how to install a toilet in five steps.

What You'll Need

Before you begin, you’ll want to assemble everything you’ll need for the job. The toilet bowl, tank, tank lid, toilet seat, wax ring and mounting hardware are included in the box. You will also need to purchase a supply line for the installation process. Additionally, you may want to have safety goggles, as well as a flashlight so you can see behind the toilet. Have a blanket or another soft surface on hand to set the toilet on while installing the mounting bolts. It’s a good idea to have someone on hand to help you lift and install the toilet bowl. 

You’ll also want to make sure you’ve properly uninstalled your previous toilet and cleaned any excess material from the area. 

Step 1: Mount the Toilet Bowl

Step 1: Mount the Toilet Bowl

The bolts and washers used for mounting your toilet bowl are included in the box. Slide the plastic washers over the bolts, leaving approximately a ¾-inch space between the washer and the head of the bolt. Next, hook the mounting bolts into the drain flange. Insert the bolt head into the larger part of the opening and slide along to the smaller part of the opening. Push the plastic washers down to tighten the bolts to the flange. Align the bolts on the drain flange so that they are parallel to the wall behind the tank. Next, carefully turn the toilet upside down and place it on a soft, flat surface, such as a blanket. Take the wax seal included with your toilet and press it firmly and evenly around the toilet flange on the underside of the bowl. The raised rubber portion of the wax seal will fit into the floor drain, so point it away from the toilet. If you used a towel to plug the waste drain during the uninstall process, remove the towel now, before you install the toilet bowl. 

Step 1: Continued

Step 1: Continued

Have someone help you lift the toilet bowl as you align the two mounting holes on either side of the toilet with the mounting bolts you installed on the drain flange. Carefully place the toilet over the flange. Make sure the rubber side of the wax seal properly fits into the drain flange. Your toilet-base mounting hardware includes a circular plastic disc, washer and nut for each side of the toilet bowl. Loosely install the circular plastic discs, washers and nuts onto the mounting bolts. Make sure the toilet is square with the wall. With a gentle rocking motion, press the toilet down to seat the wax ring and the flange. Alternating sides, tighten the washers and the nuts to the bolts using the wrench tool until the toilet is firmly seated on the floor. Be careful not to overtighten. Your toilet bowl should now be securely mounted. Check around the bottom edge of the bowl and remove any excess silicone with a towel. Install the plastic mounting covers over the bolts on both sides. 

 
 

Step 2: Install the Tank

Step 2: Install the Tank

Once the bowl is in place, it’s time to install the tank. First, remove the nut, washer and grommet from the fill-valve inlet. Next, install the large tank gasket over the outlet on the tank so that the octagonal shapes align with each other. Delta toilets feature the exclusive SmartFit tank-to-bowl connection. 

Utilizing a metal bracket on the bottom of the tank to secure the bolts to the bowl, the SmartFit tank-to-bowl connection eliminates the need for holes typically found in the bottom of the tank. This reduces potential leak points and is intended to prevent overtightening of the fasteners and cracking of the porcelain on the toilet. For your convenience, the three bolts are preassembled on the mounting plate. 

Align the three mounting bolts on the tank with the mounting holes on the toilet bowl. Slide the bolts into the mounting holes, and ensure the tank gasket is in the water inlet on the bowl. Install the washers and nuts onto the tank mounting bolts from the underside. Make sure the tank is square with the wall, then tighten the mounting nuts with the provided wrench tool. Alternate bolts while tightening until the tank fits snugly against the bowl. Be careful not to overtighten. 

 

Step 3: Connect the Water Supply Line

Step 3: Connect the Water Supply Line

Connect the supply line to the threaded inlet on the underside of the tank. Be careful not to overtighten. 

If you are installing a new supply line, connect it to the valve. Leave the valve in the off position for now. 

 

Step 4: Install the Seat

Step 4: Install the Seat

Now it's time to install the toilet seat. Seats may vary depending on which model you have, so refer to the installation instructions that came with your seat.

 

Step 5: Start the Water Supply

Step 5: Start the Water Supply

The final step is to start the flow of water within the toilet. Some models may have a rubber band or cardboard inside the tank. Be sure to remove these prior to use. Turn on the water supply at the wall, and let the tank fill to the water line. Check for any leaks. Flush the toilet and let it cycle once. Check for any leaks. Flush the toilet and let it cycle once. This completes the installation process.

If you experience difficulty at any point in the process, please call 1-855-345-3358 for assistance, or contact us online

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