Final answer:
A pump located more than 2 feet from the access opening in a whirlpool bathtub requires a minimum 12-inch opening for maintenance and safety.
Step-by-step explanation:
If a pump at a whirlpool bathtub is located more than 2 feet from the access opening, a minimum size opening of 12 inches should be installed. This requirement is to ensure that service personnel can access the pump for maintenance or repair without significant hurdles.
The opening size facilitates a reasonable level of accessibility aligned with codes and safety standards in construction and plumbing. Creating an adequate access point helps prevent complications during routine checks and when addressing potential pump malfunctions at the whirlpool bathtub.