| 摘要 |
A tub box, for use in enclosing a drain trap and a portion of a sewer-line pipe connected to the drain trap, includes a closed hollow one-piece housing adapted to receive the drain trap and sewer-line. The housing has opposite first and second end walls, and a compressible continuous side wall having a plurality of collapsible parallel folds attaching the end walls. A knock-out part has a base portion extending outwardly from the housing and a crown portion extending from the base portion. The base and crown portions are of different diameter so that removal of the crown portion creates a crown hole sized for a pipe of a given diameter while removal of the base portion creates a base hole sized for a pipe of a different diameter. A stake fastener, adapted to be secured about a stake, is located on the housing.
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