What type of sprinkler head is commonly found above ceilings with cover plates?

Concealed sprinkler heads are designed specifically for installation in locations where a seamless appearance is desired, such as above ceilings. They are equipped with cover plates that blend with the ceiling finish, allowing for an aesthetic integration into architectural designs. This type of head remains hidden until activation, which helps to maintain the visual appeal of a room or space while still providing effective fire protection.

The functional design of concealed heads includes a mechanism that holds the cover plate in place until heat activates the sprinkler system. This activation causes the plate to drop, exposing the sprinkler and allowing water to be discharged directly where needed in the event of a fire.

This design contrasts with other types of sprinkler heads, such as exposed sprinkler heads, which are visible and project from the ceiling or wall, and traditional sprinkler heads, which are also visible and can have varying designs but do not offer the concealment feature. Delayed response heads are specifically engineered to react at a slower rate to high heat, typically used in specific applications where added time is beneficial.