A device (2) for the protection of a water sprinkler head (13) includes a base (3) and sides (4) enclosing the head (13), with an open top (5).

If sampling out of an irrigation system, allow the system to run for at least 15 minutes before taking a sample at the end of a drip line or sprinkler head.

Each zone includes a sprinkler control unit (2311, 2312 ...231N) including a sprinkler connected to a water pipe for irrigation.

The arrangement is such that the sprinkler is devoid of any dynamic seals.

A method of using a residential fire protection sprinkler.

The revolving sprinkler is characterized by that its mouthpiece is exchangeable with another, second mouthpiece.

The sprinkler coefficient preferably defines a ratio of a mass flow from a compartment, in the absence of a discharging sprinkler, to the mass flow from a compartment, in the presence of a discharging sprinkler.

The waste collection unit also includes a sprinkler system (200) for cleaning the canister after disposing of the collected medical waste.

The sprinkler system includes a sprinkler having a helical configuration in a cap of the canister for generating a cone-shaped spray pattern and a spray nozzle in a base of the canister.

An adjustable sprinkler tee connector (92) for connecting a sprinkler (12) to the fire sprinkler system, a sprinkler mounting system (80) and an anti-tamper stop tap security system (68) are also provided.