Fire Alarn Flow switch and Fire control Panel 

grat video

Excellent grt explained

Nice explanation, great video. What tool did you used to remove the waterflow cover?

Sir, i want to know about the zone valve which you stated that it will give signal if missed use say if anyone accidentally closes the zone valve the tamper switch will give an alarm please show a tamper switch

good

does the size vary as per pipe size of the discharge line

1st floor 2end floor 3floor flow switch timer setting please seay

at least i found a good explanation of the system, hi YOUR FRIEND i need help with a system can you send your email to explain the trouble