Collierville, TN Building Safety: Plumbing Permits (2026)

Section 150.050 of the Collierville Code of Ordinances adopts modifications and amendments to the 2018 International Plumbing Code (IPC). Wherever the IPC refers to the code official, it means the person appointed or designated by the municipal governing body to administer and enforce the Plumbing Code.

The local amendment to IPC Section 106.1, where required, is the permit trigger. Any owner, owner's authorized agent or contractor who wants to construct, enlarge, alter, repair, move, demolish or change the occupancy of a building or structure, or to erect, install, enlarge, alter, repair, remove, convert or replace any plumbing system, must first make application to the code official and obtain the required permit. The text expressly includes residential and non-residential irrigation sprinkler systems, so a lawn sprinkler installation needs a plumbing permit too. Irrigation components located in the public right-of-way or easements are installed at the owner's risk, and replacing or repairing them is the owner's responsibility if the easement or right-of-way is used.

The Town also changes several technical IPC provisions. The minimum diameter of water service pipe is 1 inch (25.4 mm). Building sewers must be a minimum of 12 inches below grade, and the drainage and vent air test is held at 5 psi for not less than 15 minutes. A reduced pressure backflow preventer must be tested and certified by an individual certified by the State of Tennessee, with test results on site at the time of inspection. Water distribution fittings are not placed under slab installations without prior approval from the Code Official.

Appeals of code official decisions go to the Town of Collierville Construction Board of Adjustments and Appeals under the local amendment to the means of appeal section.