This Standard establishes material, mechanical, electrical, marking, and testing requirements for bathtubs/whirlpool bathtubs with doors that are made water tight by the use of a pressure seal.�?�  It addresses the functional performance and physical characteristics for a pressure sealed door of a bathtub/whirlpool bathtub.�?�  The door is intended to allow entry into the fixture when the tub is empty, and maintains water tightness when the tub is full.�?�  The use of alternate materials or methods are permitted, provided the proposed material and method comply with the performance requirements and intent of this Standard.