October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Air Relief Valve

The air relief valve is defective when boost pressure is below 7.5 psi (.53 kg/cm² ) and air is being relieved. This can be detected by a loud hissing sound. Replace the air relief valve if defective.