The Uniform Swimming Pool Spa and Hot Tub Code&code; is the only model code governing the installation, inspection and maintenance of swimming pool, spa and hot tub systems and their component products. This is an ANSI designated American National Standard consensus document written by representatives from industry companies, inspectors, plumbers and engineers.

The Key provisions of the 2009 USPSHTC and changes from the 2006 edition include:

• New specific provisions in Chapter 1: Administration to include structures, materials, equipment, appurtenances and other associated components for swimming pool, spa and hot tub systems.
• New definitions were added that specifically address terms used with the code, such as: abrasion hazard, acid, acid wash, acrylic, action pool, air channel, air switch system, ancillary facility, aquatic playgrounds, backwash, break in grade, catch pool, cavitation, coping and various types of swimming pools.
• New provisions referencing American National Standards for the installation of public swimming pools, private in-ground swimming pools, private above-ground/on-ground swimming pools, public spas, private permanently installed spas and private portable spas, including structural design requirements.
• Specific language addressing maximum water velocity in branch suction piping and suction piping velocities based on various materials.
• Revised language to include specific safety provisions in accordance with the Virginia Graeme Baker Act regarding anti-body and hair entrapment.
• Also added safety provisions for vacuum release systems to conform to American National Standards.