A manual gas switchover system is a gas switchover system that needs to be manually triggered. You need to do some work with a manual gas switchover system, because a manual switchover system requires a person to swap tanks when the gas is low. There are two options for the configuration of manual systems: single tank and multitank. Single-tank systems require complete gas shut down while the tanks are replaced.
Multitank systems can maintain a continuous gas supply as long as someone’s there to swap the tanks. Multitank systems accomplish this if you have a worker there switching valves to a second tank when the first one empties. Multitank systems can still run into problems, though. For example, if the secondary tank also empties before the first is replaced, no gas will feed into your system. The multitank manual system is preferable but still risky for facilities that demand a constant flow of industrial gas.