Nitrous / Purge Lines

Hi Guys,

was at Hockenheim Race track yesterday with some buddies, there was a dragster Test and Tune session and public race.

I checked some engine bays and the guys running nitrous had these purge lines with a solenoid valve, i asked one which purpose does it have but he could not explain. I saw that a guy used this in the pre-start during waiting to get into the staging lights.

Can you tell me the purpose of the purge valve in the Nitrous System? Is it there to empty the system if you don´t want to use it?

Thank you!

regards Michael