For Two Hour Rated Enclosures Please Contact Us.
 
FRPS one hour fire rated wall enclosure is used to protect fixtures including washer boxes, shower valves, dryer exhausts, and recessed icemaker water valves for refrigerators. I.D. dimensions for this one hour fire rated enclosure are 13.50" x 13.50" x 3.00" deep. FRPS one hour fire rated wall enclosures are compatible with all makes and models of plumbing fixtures. 
 
for more information please visit the FRPS website