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  1. Adequate structural support shall be provided under shower floors.
  2. Finished shower floor surfaces shall be smooth and waterproof.
    EXCEPTION: Grouted shower floors and other shower floors that are not waterproof, but are water-resistant, shall be permitted if the floor has a shower pan liner or a pan, base, or receptor that is waterproof with drainage.
  3. Manufactured shower pans, shower bases, and shower receptors shall be installed in accordance with this Code and the manufacturer's instructions.
  4. The edges of shower pans, bases, and receptors shall include flanges or other means of making a waterproof joint with the walls of the shower enclosure.
  5. Shower pan liners shall be provided beneath shower floors that are water-resistant (not water-proof) and also if required by the manufacturer's installation instructions for prefabricated or prefinished shower pans, bases, or receptors.
    EXCEPTION: Shower pan liners shall not be required under water-resistant shower floors if they are installed on shower pans, bases, or receptors that provide for the drainage of water seepage through the floor finish.
  6. Shower pan liners shall slope to the shower drain outlet and be sealed to the weep holes in the drain fitting. The liner shall provide a water-tight basin up to the overflow elevation of the shower floor.
  7. Shower pan liners shall be tested for leakage. There shall be no leakage indicated on the floor surrounding the shower pan for a period of not less than 15 minutes.
See Figure 7.10.6
Figure 7.10.6
A SHOWER PAN AND DRAIN

Related Code Sections

7.10.6 Plumbing Fixtures, Fixture Fittings and Plumbing Appliances, Shower Floors and Shower Pan Liners
: Grouted shower floors and other shower floors that are not waterproof, but are water-resistant, shall be permitted if the floor has a shower pan liner ...