ITM Dry Valve System

ITM Information on the inspection, testing and maintenance of a Dry Valve Fire Sprinkler System.

[@alibaba855]

I've watched lots of videos to try and understand how sprinkler systems work. This guy is hands down the clearest and most helpful.

[@regionalfpinspections835]

accelerator valve should be open! cool video thanks for sharing

[@michaeltavares4370]

Hahahah he knows he will pop the valve if he opens it. Those things suck

[@ansarishad8830]

Can you make the video of double interlock preaction valve trim assembly installation

[@TheGardista]

A strange dry system😳 What are those two valves above dry valves for 😳?

[@briancook9579]

That is so you can trip the Valve without flooding the System, you would close those valves above the dry valve then trip the valve. Water would only go to that point. You see this application with pre action systems where they protect very expensive equipment and don’t want to flood the System when they are doing there 3-year full trip test

[@ericcorona4466]

Shouldn’t the Dry and the Wet system have to have separate mains ?

[@briancook9579]

Usually there is only 1 under ground Main that can feed several systems from a Manifold, Dry or Wet it doesn’t matter

[@leam89]

Does a building owner have to periodically test the flow switch like on a wet system? How would you do this without tripping the dry system?

[@malcolmdown9170]

The dry side has no flow switch. But it does have a pressure switch which will operate from flowing water from the test drain. This will ring the water motor alarm bell and activate the pressure switch to raise an alarm.

[@briancook9579]

Dry Systems use a pressure switch in which you can test on the alarm line trim without tripping the system

[@ChuonSophak]

I don't understand a lot.sir