Catch basins - drain pipe should face down

Exterior · Gutters and Downspouts · printed page 341 (PDF page 342)

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Book index entries

Catch Basins Exterior – Grading Grading – Exterior Lot Grading

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
catch basin
straight pipe
outlet pipe (with elbow)
pipe diameter should be minimum 3"
elbow

Generated explanation

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 discharge. The right basin has a downward-facing outlet elbow with its intake below the floating debris layer, allowing water to discharge with less likelihood of clogging. Annotations recommend checking for grates to reduce debris entry and specify a minimum pipe diameter of 3 inches.

Related illustrations

1864

Drain pipe should face down

· p. 336

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