Uniform Swimming Pool, Spa and Hot Tub Code

Designated as an American National Standard, the Uniform Swimming Pool, Spa and Hot Tub Code (USPSHTC) is a model code developed by the International Association of Plumbing and Mechanical Officials (IAPMO) to govern the installation and inspection of plumbing systems associated with swimming pools, spas and hot tubs as a means of promoting the public's health, safety and welfare. The USPSHTC is developed using the American National Standards Institute's consensus development procedures.

Source: Wikipedia — Uniform Swimming Pool, Spa and Hot Tub Code (CC BY-SA 4.0)