Wash. Rev. Code § 13.22.020
(2) A juvenile may only be placed in isolation or room confinement in a detention facility or institution as authorized in this section.
(a)
(i) Total isolation and room confinement of a juvenile shall be limited in duration to no more than four hours in any twenty-four hour period. Detention facilities and institutions can exceed those four hours, including if the extension is necessary due to subsequent or multiple incidents, if the following requirements are met:
(d) When a juvenile is placed in isolation or under room confinement, the juvenile must have access to:
(e) Staff must remove the juvenile from isolation and room confinement when one of the following requirements is met:
(f) Isolation can be used when:
[ 2020 c 333 s 3.]