What happens when both teams commit a fault simultaneously in volleyball?

When both teams commit a fault simultaneously (double fault), the rally is replayed with the same server. Neither team scores a point.

Full Explanation

Per FIVB Rule 6.1.3, if two faults occur simultaneously by both teams, the rally is replayed. This is called a "double fault." Neither team is awarded a point. The replay uses the same serving team and the same server. Double faults are rare but can occur in situations such as both teams contacting the net simultaneously or both committing a positional fault at the same moment of the serve. NFHS and NCAA rules similarly result in a replay on simultaneous faults.

Rulesets covered: FIVB/USAV/NFHS/NCAA  |  Rule Reference: FIVB Rule 6.1.3