Does the downspout drain into the floor drain trap?

Exterior · Gutters and Downspouts · printed page 344 (PDF page 345)

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Book index entries

Draining into Floor Drain Traps Downspout – and Gutter Gutter and Downspout

Text in the illustration

downspout
basement
foundation wall
waste stack (cast iron)
clay downspout extension
floor drain
cool draft
clay drain pipes
leaves and other debris can clog the trap
cross section

Generated explanation

A cross section through a basement shows an exterior downspout connected to a buried clay extension beside the foundation wall. The extension turns beneath the basement floor and connects to the floor drain above its trap. The trapped drain connects to clay drain piping that also receives discharge from a cast-iron waste stack. Arrows at the floor drain indicate a cool draft, and debris is shown collecting in the trap. The illustration highlights the risk of leaves and other downspout debris clogging the floor drain trap.

Related illustrations

1646

Downspout connection upstream of trap

· p. 291

The cross section shows a basement floor drain with a below-slab trap connected to clay drain pipes serving a cast-iron waste stack. An exterior downspout enters a clay extension that runs down beside the foundation wall

1911

Downspouts discharge into floor drain

· p. 344

This cross section shows an exterior downspout connected to a clay extension that descends alongside a basement foundation and runs beneath the floor to the floor-drain piping. The underfloor clay drainage system also co