Drain pipe should face down

Exterior · Garages and Carports · printed page 336 (PDF page 337)

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Drain Pipe Face Down Drain Pipe in Catch Basins Face Down

Text in the illustration

check for grates to reduce debris entering catch basin
with straight pipe, debris can easily enter and clog outlet
outlet with elbow is much less likely to clog with debris
outlet pipe
clog
debris
water
garage/driveway drain
straight pipe
outlet pipe (with elbow)
pipe diameter should be minimum 3"
elbow

Generated explanation

Two cross-sectional drawings compare outlet arrangements in grated garage/driveway catch basins. The left basin has a straight outlet pipe at the water surface, allowing floating debris to enter and clog the outlet; only drops discharge from the pipe. The right basin has a downward-facing elbow with its opening below the floating debris layer, reducing the likelihood of blockage and allowing water to discharge. Both basins are shown with concrete walls and top grates, with an annotation advising checks for grates to reduce debris entry. The illustration specifies a minimum outlet pipe diameter of 3 inches.

Related illustrations

1891

Catch basins - drain pipe should face down

· p. 341

Two cross-sections compare catch basin outlet configurations beneath surface grates. The left basin has a straight outlet pipe at the water surface, where floating debris enters and clogs the outlet, restricting discharg