Drain Kit for use on "J" series wall cases. Routes condensate to the exterior or to the interior of the building through the wall case. Suitable provision (field applied) should be made to connect the drain tube to a drain system in the building. Drain tube assembly is 1/2" O.D. copper. NOT compatible with the RAD4A1 EXTERNAL drain tube; use of this grille would require the use of the INTERNAL TUBE configuration to drain the unit

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