I replaced a HWT in a house and noticed a leak in the mech room on the sprinkler system from a gauge. It looks simple to replace but is there anything I need to know about shutting down or refilling the system? I know it has a flow switch but I don't know, do you need to shut power off to the system before draining it?
If it matters it's a single detached house.
Any help is appreciated.
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If it has a flow switch it may well be connected to an alarm system. If the system is monitored you get a neat response form the fire department.
If monitored notify the alarm company your shutting down for repairs, then kill it. Should be a drain down port to drain the system. Do what you need fire it up, bleed it out, power on and notify alarm company your back up.
In my State a plumber may only work on a system with 5 or less heads. Anything else you need to be certified for suppression systems. Make sure your OK where your at to work on them.