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Is the installation of the retaining flange provided with the Model XL institutional sprinkler escutcheon kit a UL Listing requirement?

April 26, 2017escutcheon flange installation institutional kit model provided retaining sprinkler XL

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Is the installation of the retaining flange provided with the Model XL institutional sprinkler escutcheon kit a UL Listing requirement?

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No, installation of the retaining flange is not a UL Listing requirement. The tamper resistant and self-injury prevention features of institutional sprinklers are not part of the UL Listing. They are design features provided by the sprinkler manufacturer. For maximum tamper resistance, it is the responsibility of the installing contractor to secure the nipple on which the sprinkler is installed to prevent the sprinkler and escutcheon assembly from being pulled away from the wall or ceiling. The retaining flange is provided as a way of securing the branch line piping, in the form of a nipple or arm-over, to prevent pipe movement initiated by the room occupant. If the retaining flange cannot be used due to larger piping or over-sized wall sleeves, alternative devices approved by the installing contractor or design engineer may be used to secure the piping from movement.