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How to Install a Hatbox Toilet

A hatbox-style toilet makes for a less obtrusive bathroom essential. This unique looking toilet utilizes a motorized flush mechanism concealed in the body of the bowl, so there is no visible tank.

More in Plumbing

  • Time


  • Price Range

    $500 - $1,000

  • Difficulty

    Moderate to Hard


Step 1: Attach the Tank to the Floor

Follow the manufacturer's instructions for installation of the hatbox toilet. Begin by setting the wax ring directly onto the flange (Image 1) then pressing the entire unit onto the floor, making certain that it aligns properly with the drain hole in the floor.

Attach the tank to the floor and plywood subfloor, using long lag screws. Use a socket wrench with a socket extender to tighten the bolts down.

Next, attach the rubber gasket to the tank itself (Image 2).

Step 2: Connect the Water Supply Line

Connect the water supply line to the shut-off valve and then the toilet. Hand-tighten the connections first, then tighten each down fully using a small adjustable wrench.

Step 3: Fill the Tank and Position the Toilet Bowl

Open the shut-off valve on the supply line and allow the tank to fill to the water line. An adjustment screw can be tightened or loosened to adjust the level of the water in the bowl.

Snap the collar over the rubber gasket that leads to the drain. Set the toilet bowl in position, centering it over the collar piece.

Step 4: Connect the Electrical Lines and Finish Installation

Once the bowl is in place, follow the manufacturer's instructions to connect the electrical lines and the refill tube. Now you can check for proper operation with a test flush.

Attach the toilet seat to complete the installation.

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  • Hatbox tankless toilet from Kohler