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EERE » BTO » Building America » Solution Center Home » Drain tile surrounded with ≥ 6 in. of ½ to ¾ in. washed or clean gravel, with gravel layer fully wrapped with fabric cloth.

Drain tile surrounded with ≥ 6 in. of ½ to ¾ in. washed or clean gravel, with gravel layer fully wrapped with fabric cloth.

See the following guides for relevant information.

Footing Drain Pipe
Below-Grade Water Management for Urban Sites