What is ACV & how to work ?

How to Alarm Check Valve working ?
#fire
#firealarm
#firesystem
#firefighter
#firefighting
#bell
#sprinklersystem
#alarmcheckvalve
#alaraaf #alarmsystems
Music: A New Beginning
Musician: Agnese Valmaggia
URL: filmmusic.io/s...
License: creativecommon...

[@faizansheik5879]

Than u

[@ShahbazHussain-iw6ol]

Good job sir

[@mokhles23]

Thanks

[@dharmendrachauhan7671]

Thoda or detail me bataun please

[@mokhles23]

@@dharmendrachauhan7671 apka doubt batai.