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MCDDC - Our Drainage Coalition - Now Seeking Flooding Relief for All of Houston. Recent Gray Matters Editorial by RAF Board Members. Right now, too many real-estate developments do not detain storm water run-off from th.

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Down spouts into 4 inch solid corrugated drain pipe. Reasons for routing gutter runoff into underground drain pipe away from building. Eliminate tripping hazards along walks, patios and drives. Down spout adapters are available for both 2x3 inch and 3x4 inch down spouts. Down spout adapters fit to 4 inch corrugated solid drain pipe. Downspout adapters designed to fit between existing home gutters and 4 inch corrugated drain pipe. 3x4 inch down spout to 4 inch corrugated drain pipe.