Thread: @ 2" ceiling plate?

Anyone know what this thing on the breakfast area ceiling is - it's about two inches in diameter and is in a few other rooms too.

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Glass breakage detector for central alarm system.

Originally Posted by Raymond Wand

Glass breakage detector for central alarm system.

Thanks Raymond!

Many newer homes have fire sprinkler heads covered by plastic caps. They pop off when the system activates.

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Many newer homes have fire sprinkler heads covered by plastic caps. They pop off when the system activates.

Yes sir! You find those in most multi-family units! And some homes.

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Yes sir! You find those in most multi-family units! And some homes.

I've seen something like that without the holes in it. One in the kitchen, one in the living room. They were the capped off lift point for a manufactured building. Look on the outside roof above the cap to find out for sure. There will be a raised nipple where the cable passed through. It should be capped off; if it's not... it will leak. (I'm aware another forum member identified it as a glass breakage sensor... it probably is... just putting in my two cents worth).

- - - Updated - - -

I've seen something like that without the holes in it. One in the kitchen, one in the living room. They were the capped off lift point for a manufactured building. Look on the outside roof above the cap to find out for sure. There will be a raised nipple where the cable passed through. It should be capped off; if it's not... it will leak. (I'm aware another forum member identified it as a glass breakage sensor... it probably is... just putting in my two cents worth).

I've seen something like that without the holes in it. One in the kitchen, one in the living room. They were the capped off lift point for a manufactured building. Look on the outside roof above the cap to find out for sure. There will be a raised nipple where the cable passed through. It should be capped off; if it's not... it will leak. (I'm aware another forum member identified it as a glass breakage sensor... it probably is... just putting in my two cents worth).