Drainage manifolds and buildings

Abstract

In a resin-made drainage manifold, a configuration is achieved that can further suppress axial displacement of the sound-insulating cover relative to the pipe body. [Solution] The drainage manifold pipe 1 is installed so that the pipe body 10 penetrates the floor slab X of the building T. The drainage manifold pipe 1 is made of resin. The drainage manifold pipe 1 has a sound-insulating cover 12 located on the outer circumferential surface of the pipe body 10, and a first cover member 18 located on the outer circumferential surface of the pipe body 10 in one axial direction relative to the sound-insulating cover 12. The sound-insulating cover 12 has a projection 1221 that protrudes radially inward from the inner circumferential surface of the outer casing 122 of the sound-insulating cover 12. The sound-insulating cover 12 is fixed to the first cover member 18 such that the projection 1221 contacts the axial ends 1801, 1802 of the first cover member 18 and does not move axially relative to the first cover member 18.

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