If a water heater is installed in a crawlspace, it shall have adequate access with a travel path no less than ______ feet of vertical distance.

When a water heater is installed in a crawlspace, proper accessibility is crucial for maintenance and safety. The requirement of having a travel path with a minimum of 5 feet of vertical distance is specifically designed to ensure that a technician can safely and easily access the water heater. This height allows for adequate headroom, reducing the risk of injury while working in a confined space.

Additionally, having sufficient vertical clearance can also facilitate the removal of the unit if necessary, making it easier to perform repairs or replacements. By setting this standard, the regulations ensure that plumbing professionals can do their jobs effectively and safely, while also minimizing potential hazards associated with improper access conditions.